1. consider these three patterns of water waves: a b c a. describe the similarities and differences of the three patterns of water waves. b. experiment to make similar patterns, then explain how you can use the simulation to make each. 2. experiment to make waves of different interference patterns with water, sound, and light. explain how you created an interference pattern with two sources, and ways that you changed the pattern. include a few captured images from the simulation to demonstrate.

Answers

Answer 1

The motion of the water atoms in a wave is orbital. When the depth exceeds 50% of the wave's wavelength, the wave is said to be in deep water.

Are longer wavelengths common in all water waves?

Wavelengths vary wildly between different types of waves. Surf waves in the ocean have a wavelength of 30–50 m, but tsunamis have significantly longer wavelengths (about 100km). Humans can hear sounds with wavelengths between 70 mm and 70 m, depending on the pitch of the sound.

Which three wavelengths are these?

The medium (such as air, water, or a vacuum) through which a wave travels determines its wavelength. The periodic electrical signals in a conductor, sound waves, light waves, and water waves are all examples of waves.

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Related Questions

what is the debroglie wavelength in picometers (10-12m) of an electron that is traveling at 79.1% of the speed of light?

Answers

The debroglie wavelength in picometers (10-12m) of an electron that is traveling at 79.1% of the speed of light is  2.8 × [tex]10^{-12}[/tex]

Mass of electron m = 9.1 × [tex]10^{-31}[/tex]kg

speed of electron v = 3 ×[tex]10^{8}[/tex] m/s * (79.1/100) = 2.37 × [tex]10^{8}[/tex] m/s

debroglie wavelength λ = h/mv

λ = 6.626 [tex]10^{-34}[/tex]/9.1 × [tex]10^{-31}[/tex] × 2.37 × [tex]10^{8}[/tex]

λ  = 2.8 × [tex]10^{-12}[/tex]

In many branches of physics, the speed of light in a vacuum, commonly abbreviated as c, plays a crucial role. Exactly 299,792,458 meters per second is the speed of light, or c. [Note 3] The speed at which common matter or energy can travel through space (and, consequently, any signal carrying information) is limited to c, according to the special theory of relativity.

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an object moves halfway around a circle of radius r. an inward radial force of magnitude f is exerted on it. the work done on the object by the radial force being exerted on it is

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The item moves halfway around a circle of radius r. an inward radial pressure of magnitude f is exerted on it. the paintings done on the item through the radial force being exerted on it is zero.

In physics, paintings is the power transferred to or from an object via the software of pressure along a displacement. In its most effective form, for a consistent strain aligned with the direction of motion, it equals the fabricated from the force strength and the gap traveled.

The work modifications the quantity of mechanical and internal electricity possessed with the aid of devices. whole paintings is carried out on a gadget or object, power is added to it.

The individual of labor accomplished can be categorised in three instructions. they're +ve paintings, -ve paintings and 0 work. The character of work is based upon at the attitude amongst stress and displacement..

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Can someone please help meeeeeeee! I’m so bad at these stuff. Ill give brainliest too

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1.) The Northern Hemisphere refers to the half of the planet that is north of the equator, while the Southern Hemisphere is all of the planet south of the equator.
2.) the rate of decrease is larger the higher the latitude.
3.) 9 hours, 46 minutes
4.) Key West, FL 78.1°F
5.) Russian city of Yakutsk
Last one don’t know how to answer sorry

g an apple pie in a 9.00 in diameter plate is placed upon a rotating tray. then, the tray is rotated such that the rim of the pie plate moves through a distance of 158 in. express the angular distance that the pie plate has moved through in revolutions, radians, and degrees.

Answers

The angular distance should be the angular distance that the pie plate has moved through in revolutions, radians, and degrees are 5.59 revolution and  2012.4° respectively.

In revolution, θ = 8.24 revolution.

In radian = θ = 57.78 rad.

In degree θ = 2966.4°.

Calculation of the angular distance:

Since

Pie diameter = 9 in

So,  the circumference of the pie should be

P = πd = 9π in

And, rim of the pie rotates 158 in,

So,

1 Revolution of the pie is 9π in,

So, for 158 it should be

= 158 in / 9π in revolution

= 5.59 revolution

Now in the case when

1 revolution is 2πrad

So,

5.59 revolution = 5.59 × 2π = 87.79 rad.

And also, 1 revolution is 360°

5.59 revolution = 5.59 × 360 = 2012.4°

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let's say you use a heat pump to pump heat from room a to room b. the temperature in room a is 18.6 oc and in room b is 27.3 oc. if your goal is to cool space a, what is the theoretical cop limit?

Answers

The theoretical Coefficient of Performance (COP) to cool the room A is 33.52.

Temperature in room A = T₁ = 18.6 oc

Temperature in room B = T₂ = 27.3 oc

To convert temperatures in Kelvin,

= T₁ = 18.6 + 273 =

= T₁ = 291.6 K

and,

=  T₂ = 27.3 + 273

=  T₂ = 300.3 K

The COP value to cool room A =

= COP = T₁ / (T₂ - T₁)

= COP = 291.6  / (300.3 - 291.6 )

= COP = 291.6 / 8.7

= COP = 33.52

The theoretical coefficient of performance to cool room A is 33.52 when the temperature of room A is 18.6 oc and that of room B is 27.3 oc.

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A student has an ohmic lightbulb connected to a battery that has significant internal resistance. As the student connects other identical lightbulbs in parallel to the first lightbulb, which of the following would be a reasonable observation about the brightnesses of the lightbulbs?
a. Each lightbulb gets brighter as more lightbulbs are added.
b. Each lightbulb gets dimmer as more lightbulbs are added.
c. When each lightbulb is added, it is the same brightness as the first lightbulb, which remains the same brightness throughout.
d. The first lightbulb remains the same brightness, but each added lightbulb is brighter than the original.
e. The first lightbulb remains the same brightness, but each added lightbulb is dimmer than the original.

Answers

Based on the information provided regarding the parallel circuit, reasonable observation about the brightness of the lightbulbs would be that when each lightbulb is added, it is the same brightness as the first lightbulb, which remains the same brightness throughout. (Option C)

A parallel circuit refers to a circuit that comprises of branches so that the current divides and only part of it flows through any branch. The voltage, or potential difference, across each branch is the same. Two or more bulbs in a simple parallel circuit have full voltage of the battery, hence the brightness of each bulb remains unchanged.

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A bowler uses a lane with a coefficient of kinetic friction of 0.211. The bowler releases her 5.20 kg bowling ball with a translational speed of 2.35 m/s. At the moment of release, the ball is not rotating. As the ball slides, it begins to rotate.

What is the work nc done by friction on the ball before it transitions to rolling without slipping? Use =9.81 m/s2 for the acceleration due to gravity.

Answers

The work done by friction on the ball before it transitions to rolling without slipping is 7.04 J.

What is the final velocity of the bowling ball?

The final velocity of the bowling ball is calculated by applying the principle of conservation of angular momentum as follows;

Li = Lf

mv₁r = mv₂r + Iω

where;

I is the moment of inertia of the bowlω is the angular velocity of the ballv₁ is the initial velocity of the ballv₂ is the final velocity of the ball

mv₁r = mv₂r + (²/₅mr²)ω

mv₁r = mv₂r + (²/₅mr²)(v₂/r)

mv₁r = mv₂r + (²/₅mr)(v₂)

r(mv₁) = r(mv₂ + ²/₅mv₂)

mv₁ = mv₂ + ²/₅mv₂

v₁ = v₂ + ²/₅v₂

v₁ = 7v₂/5

7v₂ = 5v₁

v₂ = 5v₁/7

v₂ = (5 x 2.35 m/s)/7

v₂ = 1.678 m/s

The work done by friction on the ball before it transitions to rolling without slipping is calculated as follows;

work done by friction = change in kinetic energy of ball

ΔK.E = ¹/₂m(v₂² - v₁²)

ΔK.E = ¹/₂ x 5.2(1.678² - 2.35²)

ΔK.E = -7.04 J

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Answer:

-7.03266 N

Explanation:

Work = Final kinetic energy - initial kinetic energy

[tex]W_{nc} = K_{f} - K_{i}[/tex]

Finding initial kinetic energy:

[tex]K_{i}=\frac{1}{2}mv^{2}= \frac{1}{2}(5.2)(2.35)^{2}=14.3585\\[/tex]

Finding final kinetic energy:

We have mass, but don't have final velocity. Have to find [tex]v_{f}[/tex] next.

We can use the kinematics equation combined with the fωorce equation. The force that slow the ball down is friction force. [tex]v_{f}=v_{0}+at=v_{0}+\frac{F}{m}t=v_{0}-\frac{f}{m}t[/tex]

Finding f/m

f=μmg ⇒ (f/m)=μg=0.211(9.81)=2.06991

Plug that back into the equation

[tex]v_{f}=2.35-2.06991t[/tex]

Now to find time, we can use angular velocity

τ=fR and α=τ/I and [tex]I=\frac{2}{5}MR^{2}[/tex], so [tex]\alpha =\frac{fR}{\frac{2}{5} MR^{2}}=\frac{5ug}{2R}[/tex]

ω=αt=(5μg)(t)/(2R)=5.174775(t/R)

v=rω=5.174775t

Therefore, [tex]v_{f}=2.35-2.06991t=5.174775t[/tex]

t=0.32437

Plug time back into the v_f equation.

[tex]v_{f}=2.35-2.06991(0.32437)=1.67858[/tex]

Plug v_f back into the K_f equation

[tex]K_{f}=\frac{1}{2}mv^{2}= \frac{1}{2}(5.2)(1.67858)^{2}=7.32584[/tex]

Work done by friction

[tex]W_{nc} = K_{f} - K_{i}=7.32584-14.3585=-7.03266[/tex]

calculate the work w done by the gas during process 1→3→6 . express your answer in terms of p0 and v0 .

Answers

6P₀V₀ is the work done by the gas during process 1→3→6.

What is work done by gas?

The work performed by a gas expanding against an external pressure is negative, analogous to the work performed by a system on its surroundings. In contrast, when a gas is compressed externally, V₀ and the work is positive because the environment exerts force on the system.

The gas must release some energy into the environment when it expands in response to an external pressure. The overall energy of the gas is thus reduced as a result of the negative work. When a gas is compressed, energy is transferred to it, increasing its energy as a result of positive work.

Let's consider,

Work done = -W (As the energy is released)

External pressure = P₀

Volume of gas = V₀

So, the work done can be calculated as follows:

W = P x (dV)

-W = P₀ × V₀

Now according to the process given:

1→3→6

Energy flow increases up to 6.

Hence, the energy of the system (work done) is:

-W = 6 × P₀ × V₀

-W = 6P₀V₀

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would the balloon hit the ground before or after 1.0 s of falling? which equation did you use to decide, and what comparison did you make to determine that it would or would not hit the ground by then?

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The first equation will be used  to determine that it would  hit the ground  after 1.0s of falling (in 1.56 s).

Equation of motion are a mathematical formula that describes the position, velocity or acceleration of a body relative to a given frame of reference

The first equation to be used will be second equation of motion

x = v₀t + 1/2at²

where, x = distance

a = uniform acceleration

t = time

12 = 1/2*9.8 *t²

24 = 9.8 * t²

t = 1.56 s.

The balloon will hit the ground after 1.0s of falling.

The 1st equation was used because of the values provided which included the distance and the acceleration due to gravity. The 2nd equation has final velocity and initial velocity which couldn't be compared from the data given.

The given question is incomplete complete question is:

A student holds a water balloon outside of an open window and lets go. The window is 10 meters above the ground, and the balloon is falling under the acceleration of gravity, which is 9.8 m/s2. There are two equations that can be used to describe its motion over time:

x=x0+v0t+12at2

v=v0+at

Would the balloon hit the ground before or after 1.0 s of falling? Which equation did you use to decide, and what comparison did you make to determine that it would or would not hit the ground by then?

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Nuclear decay occurs according to first-order kinetics. How long will it take for a sample of titanium-45 to decay from 65. 0 grams to 25. 0 grams? the half-life of titanium-45 is 3. 08 hours.

Answers

It will take 4.24 hours for a sample of titanium-45 to decay from 65. 0 grams to 25. 0 grams.

Half life of first order reaction is given by: [tex]t_{1/2}[/tex] = 0.693/k

Given half life is 3.08 hours.

So k = 0.225

Rate of first order reaction is given by: [tex]kt = 2.303 * log(R'/R)[/tex]

Where k = rate of reaction = 0.225

t= time taken

R' = final amount = 25g

R = initial amount =65g

Putting these values we get t=4.24 hours.

So it will take 4.24 hours for a sample of titanium-45 to decay from 65. 0 grams to 25. 0 grams.

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suppose that a disk of indefinite radius is rotated at an angular velocity w in a large volume of liquid

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The central angle relating to an object's position on a circle changes as it moves along a circular path.The rate at which this angle changes with respect to time is known as the angular velocity, denoted by the symbol w.

A Ferris wheel, for instance, might rotate pi / 6 radians every minute.

If a disk of indefinite radius is rotated at an angular velocity $w$ in a large volume of liquid, the liquid will experience a force known as the centrifugal force.

This force is directed radially outward from the axis of rotation and is given by the equation $F = mrw^2$, where $m$ is the mass of the liquid, $r$ is the distance from the axis of rotation, and $w$ is the angular velocity.

The magnitude of the force increases with the mass of the liquid, the distance from the axis of rotation, and the angular velocity of the disk.

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when a rigid object rotates about a fixed axis, what is true about all the points in the object? (there could be more than one correct choice.)

Answers

When a rigid item rotates along a fixed axis, the following occurs:

They are all moving at the same angular speed.

They are all moving at the same angular velocity.

When a rigid item rotates along a fixed axis, the following occurs:

They are all moving at the same angular speed.

They are all moving at the same angular velocity.

When a rigid item rotates along a fixed axis, all of its angular speeds are the same.

All of the particles in the rotating object have the same angular speed.

They are all moving at the same angular velocity.

All of the particles in the rotating object have the same angular acceleration.

All of this stems from the following relationships:

v=wR

a = alpha*R

where w is the angular velocity and alpha is the angular acceleration.

tangential velocity and acceleration depend on the distance from the axis, whereas angular velocity and acceleration are the same for all the points on the rotating body.

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explain the relationship between diffraction angle and wavelength using the two dimensional diffraction relationship n

Answers

Diffraction is defined as the bending of waves through an aperture or around the edges of an obstruction into the vicinity of the barrier and The wavelength's length directly affects the angle of diffraction.

Why is it called wavelength?

When electromagnetic radiation such as radio waves, light waves, or infrared (heat) waves travel through space, they leave behind distinctive patterns. The wave has a distinct size and shape. Wavelength is the separation between peaks (high points).

What occurs if the wavelength is boosted?

A wavelength's frequency plus energy (E) drop as it gets longer. You may conclude from these formulas that the length gets shorter as the frequency rises. The wavelength lengthens as the frequency drops.

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Figure 1-1 shows how a steel ball moved during an experiment. Average speed is calculated by dividing total distance by time. Did the steel ball speed up, slow down, or remain at the same speed throughout the experiment?

Answers

The ball is seen to be speeding up as the distance increases with time.

What is speed?

We know that speed is the ratio of the distance to the time that is taken by the object. We know that when an object is speeding up, the distance of the object is going to increase linearly with the time taken.

If we look at the graph that has been shown in the image that is attached to this answer, we would notice that the distance that is covered is increasing with time.

The speed can then we obtained from;

Speed = [tex]y_{2} - y_{1}/x_{2} - x_{1}[/tex]

= 80 - 0/6.5 - 0

= 12.3 m/s

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what would be the effect on the motion of the cross if the center of mass of the body were to one side of the axis of rotation

Answers

Never does a free body revolve around its center of mass ( the instantaneous axis of rotation never passes through the center of mass).

Explain about the axis of rotation?

Being a hypothetical object, the axis of rotation might be a challenging notion to understand. An imaginary line that extends through the joint's pivot or rotation point is referred to as the axis of rotation in terms of human anatomy (for example, the axis of rotation for flexing and extending the arm projects through the elbow joint).

The intersection of these three axes, which are the longitudinal, lateral, and vertical ones, each of which is perpendicular to the others, occurs at the center of gravity of the aero plane.

Position, momentum, and angular momentum make up an object's motion when it is rigid. Therefore, the "axis of rotation" is the unit vector, which is the object's angular momentum vector divided by the angular momentum magnitude (and therefore undefinable in the absence of angular momentum).

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a 40kg child takes a ride on a ferris wheel that rotates fouyr times each minute and has a diameter of 18m what is the centripetal acceleration

Answers

The centripetal acceleration is [tex]1.58m/s^2[/tex]

What is centripetal acceleration?

Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any object moving in a circle with an acceleration vector pointing in the direction of the circle's center.

It is calculated by

ac = rω^2

where

ac = centripetal acceleration

r = radius

ω = angular velocity

Given,

ω = 4 revolution,  

diameter = 18m so, radius r = 9m

Subsituting the values in equaion

ac =  [tex][9m] [[4.0\frac{rev}{min} ][\frac{2\pi rad}{rev} ][\frac{1 min}{60s} ]]^2[/tex]

ac = [tex]1.58m/s^2[/tex]

The centripetal acceleration is [tex]1.58m/s^2[/tex]

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the ring and the disk shown above have identical masses, radii, and velocities, and are not attached to each other. if the ring and the disk each roll without slipping up an inclined plane, how will the distances that they move up the plane before coming to rest compare?

Answers

The ring will move farther than will the disk.

The torque required to achieve a desired angular acceleration about a rotational axis depends on the moment of inertia of a rigid body.

The moment of inertia of a ring is given by the following equation [tex]I=mr^{2}[/tex]

similarly, the moment of inertia of a disk is [tex]I=m\frac{r^{2} }{2}[/tex]

Where, m and r is the mass and the radii of the ring and the disc.

The body's mass distribution and the axis selected to affect the moment of inertia, with larger moments requiring more torque to change the rotation rate. The object with the lowest moment of inertia will descend to the bottom first because it is resistance to rotational motion.

Therefore the disc will reach the bottom first, but due to the higher moment of inertia than the disc the ring will move farther than the disc.

The question is incomplete. The correct question is

A ring and a disk have identical masses, radii and velocities and are not attached to each other. If they each roll without slipping up an inclined plane, how will the distances that they move up the plane before coming to rest compare?

a. The ring will move farther than the disk.

b. The disk will move farther than the ring.

c. The ring and the disk will move equal distances.

d. The relative distances depend on the angle of elevation of the plane.

e. The relative distances depend on the length of the plane.

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a long straight wire carries current to the right. above the wire is a square wire loop. if the loop moves away from the long ,straight wire what is the direction of the induced current in the loop?

Answers

The loop's induced current flows counterclockwise because a long, straight wire carries current in that direction (to the right). There is a square wire loop above the wire. if the loop departs from the lengthy.

The loop's magnetic flux will decrease as the current in wire AB in the wire drops. Therefore, to counteract the drop in magnetic flux, the current introduced into the loop must be counterclockwise. Induced current definition The current that results from electromagnetic induction is known as the induced current. The production of electric power relies heavily on electromagnetic induction. Typically, metal is drawn through a hole in a die or draw plate to create wire. There are numerous standard sizes for wire gauges.

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The physician who was inspired by traveling mesmerists and who coined the term hypnosis was ____________. A. Franz mesmer b. James braid c. Jean martin charcot d. Sigmund freud please select the best answer from the choices provided a b c d.

Answers

James braid, a physician, is credited with coining the term hypnosis after becoming mesmerized while traveling. Hence, the relevant option is option (b).

Who was James braid?

James Braid was born on June 19, 1795, and passed away on March 25, 1860. He was a well-known Scottish surgeon who was also a gentleman scientist and natural philosopher. According to Braid, hypnotic suggestion can be an effective treatment for nervous system functioning problems. Comparative anatomy has been defined as the study of similar body features in various animal species in order to suggest or comprehend modifications that have to occur underground during the course of evolution from very similar predecessors.

The research that compares the structural differences between various animal species in order to comprehend the changes that each species went through during the stage of evolution from their common ancestors. James braid, a physician, is credited with coining the term hypnosis after being mesmerized while traveling.

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46. what minimum friction force must exist between the tires and the road to prevent the car from skidding as it rounds the curve?

Answers

Daniel G. A=v2r calculates centripetal acceleration. The recommended minimum friction coefficient is 0.4.

How much friction must there be at a minimum for the car to stay on the road?

Of course, the car won't slide if the coefficient of friction is higher than 0.141; this is the minimum value. The frictional force is parallel to the velocity, as you can see.

What level of frictional force is needed to prevent the car from swerving?

A car needs a centripetal force of mV2/R, where m is the mass of the vehicle, V is the speed, and R is the radius of the circular portion of road, in order to maintain its position on the road without skidding. Fs/Fl = 4mV2/R / 2mV2/R is obtained by dividing Fs by Fl.

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Scientists at a metallurgic factory are testing different metals to study the strength of the electrical forces between their atoms. They determined the force needed to bend a sheet of each metal and found that metal a requires 50 n of force, metal b requires 30 n, metal c requires 70 n, and metal d requires 100 n. Which metal will have the lowest melting point?.

Answers

The metal that has the lowest melting point must be the metal that has the lowest density and therefore is easiest to bend. That is metal B.

The melting point of the metal depends upon the types of bonds between the metal atoms. The relationship between the melting point of a substance and the strength of the intermolecular force of that substance is directly proportional. That means that the stronger the intermolecular forces of the substance, the higher the melting point of the substance.

Tungsten has the highest melting point of any metal in the periodic table is 3422 °C.

As the strength of the intermolecular forces increases, more energy is needed to disrupt the attraction between these molecules. As a result, increasing intermolecular forces results in a concomitant increase in melting point.

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A helium-neon laser emits light with a wavelength of 633 nm. What is the frequency of this light.

Answers

Answer:

The frequency of light beam is 4.74 x 10^(14) s^(-1)

Explanation:

In this problem we use the formula C=F x ( lamda )

here c= the speed of light

f =the frequency of light beam

lamda = wavelength

c=3 x 10^8 m/s ( universally same)

lamda = 633nm = 633 * 10^(-9) m

Therefore f = c/ ( lamda )

or; f = 3 x 10^8 /  633 * 10^(-9)

f= 4.74 x 10^(14) s^(-1) .

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An engineer is investigating potential energy with two identical magnetic roller coaster cars on different sides of a center magnet that cannot move. To test her ideas, the engineer will move one car one space. Which movement will result in the largest increase in potential energy?.

Answers

Movement that will result in the largest increase in potential energy : All the movements will result in the same change in potential energy because they each move a roller coaster car for the same distance.

Which movement  will result give largest increase in potential energy?

Since they move in the same direction, therefore share the same magnetic qualities and move one unit identically.

The potential energy increases because train moves against the magnetic force and potential energy does not change because the magnets in the system do not change. Engineer is experimenting with two identical magnetic roller coaster cars on the different sides of a center magnet that cannot move.

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In a canoe race, team a is traveling 6 miles per hour and is 2 miles ahead of team b. Team b is also traveling 6 miles per hour. The teams continue traveling at their current rates for the remainder of the race. Using d for distance (in miles) and t for time (in hours), write a system of linear equations that represents this situation.

Answers

Linear equation for team a; d = 6t + 2 and Linear equation for team b;

d = 6t.

What is the relationship between speed, distance and time?

To find speed, divide the distance of the journey by the time it took to travel. To calculate the time, divide distance by speed and to get the distance, multiply  speed by time.

Given that in a canoe race, team a is traveling 6 miles per hour and it is 2 miles ahead of team b.

Team b is traveling 6 miles per hour. The teams continue the traveling at their current rates for the remaining race.

We know that speed= distance/time

Linear equation for team a;

d = 6t + 2

Linear equation for team b;

d = 6t

d is distance and t is time.

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consider a wave passing through a single slit. what happens to the width of the central maximum of its diffraction pattern as the slit is made half as wide? it becomes one-fourth as wide. it becomes one-half as wide. its width does not change. it becomes twice as wide. it becomes four times as wide.

Answers

Wave passing through a single slit  it becomes twice as width of the central maximum of its diffraction pattern as the slit is made half as wide.

The central maximum lies between the first-order minima defined by the relation sinθ dark =mλ/a=λ/a. Because the angle is small, sinθ dark  ≈tanθ dark  =y dark/L, so the width of the central maximum is proportional to Lλ/a. Thus, the central maximum becomes twice as wide if the slit width a becomes half as wide.

In order to enter the region of geometric shadow cast by the obstruction or aperture, waves must interact with one another or bend around its edges, which is referred to as diffraction. A secondary source of the wave that is propagating is in fact created by the diffracting item or aperture. The term "diffraction" was originally used in 1660 by the Italian scientist Francesco Maria Grimaldi, who was also the first to make precise observations of the phenomena.

On the registration plate, an infinite number of spots (three are illustrated) along length d project phase contributions from the wave front, resulting in a constantly changing intensity.

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a laser emits photons continuously at a rate of 6.8*1016/s. if the wavelength of the photons is 641 nm, what is the laser power in mw?

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The laser power is 27,69 mW.

Power= energy/sec = J/s

Photon energy= hf= hc /wavelength

# of photons/sec = power/ photon energy= rate of emission

Photon Energy= ( 6.63 × [tex]10^{-34}[/tex]) × 3×[tex]10^{8}[/tex] / 6.8×[tex]10^{16}[/tex] ≈ 3.147 ×[tex]10^{-42}[/tex] J

This should be ignored. It is part of the units and not the equation.

Power/3.147 × [tex]10^{-42}[/tex] = 8.8 × [tex]10^{26}[/tex] [tex]s^{-1}[/tex]

Power= 8.8 × [tex]10^{-26}[/tex]- 3.147 × [tex]10^{-42}[/tex] J= 0 .02769 W = 27.69 mW

How is laser power determined?

The energy levels of the electrons in the atoms of the material used to create the laser beam—often referred to as the "lasing" material—determine the intensity of the laser beam. The wavelength of the light generated by the lasing material has an inverse relationship with the energy level of the photons that are created by it.

Can a laser's power be increased?

The intensity of the light increases with the amount of energy used to excite those atoms in the laser. It almost resembles dialing up the sound system's volume control. However, if you turn that level up too loud, you run the danger of harming your hearing or the sound system itself.

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the technology that allows engineers to penetrate rock at multiple angles instead of simply a straight line is called(1 point)

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The method used by engineers to pierce rock at angles other than just a straight line is known as directional drilling.

What is method?
A procedure connected to a message and an object is referred to as a method throughout object-oriented programming (OOP). An object is made up of state information and behaviour, which together make up the interface that outlines how any of the object's various consumers may use it. A method is indeed a consumer-parametrized behaviour of an object. Behaviors have been represented as methods, while data is represented as an object's properties. For instance, a Window object may have properties like open and close as well as methods like open and close, and its state (whether it is opened or closed at any given time) would be a method.

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A diver in the pike position (leg? straight _ hands on ankles) usually makes only one or onc-and-a-half rotations. To make tWO Or three rotations_ thie cliver goes into tuck position (knees bent , body curled up tight) . Why? 12.62 A 120-Cm-wide sign hangs from 5.0 kg; 200-cm-long pole cable of negligible maSS supports the end of the rod as shown in the figure_ What is the HaXimu maSS of the sign if the maxinm tension in the cable without breaking is 300 N? Note: You will be graded On your use of all elements from Dynamics Worksheet Problem 2. Cable 250 cm 200 cm PATSIES SHIPPE 80 cm

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It's crucial to understand that when a diver leaps off a springboard, their angular momentum stays constant until they touch the water's surface.

Despite acting on the diver, gravity does not exert a net positive or negative torque on the diver since it passes through the diver's center of mass. The diver can make two to three rotations when in the tuck position, but only one or two rotations when in the pike position. The moment of inertia of the two places is the cause. The moment of inertia of the diver in the tuck position can be lower. Given that the diver's angular speed is inversely proportional to the moment of inertia, she will make more rotations for the constant angular momentum.

I1w1 =I2w2

w1/w2 = I1/I2

I1 = mr1^2

I2 = mr2^2

r2<r1

then I2<I1

w1/w2<1

w1<w2

From the above analysis we can say that the angular velocity is less in the first case than in the later case which means the number of rotations made in the tuck position is more than number of rotations made than that in pike position.

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what is the minimum angular spread of a 633-nm wavelength he-ne laser beam that is originally 1.00 mm in diameter? (answer in degrees)

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The diffraction-induced minimum angular spread is 633 10 9 meters.

What is diffraction-induced propagation?

When the hole is illuminated by a parallel ray of light of wavelength lambda, it is believed that the dispersal of the spot (gotten on the left wall of the video) equals the sum of its geometrical dispersal and the spread induced by diffraction.

Diffraction is the term used to describe the spreading out of waves when they pass through an apertures or around objects. It occurs when the aperture's or obstruction's size and the incident wave's wavelength are of same magnitude. At very small aperture diameters, the most of the wave is blocked.

Briefing : Minimum angular spread due to diffraction (θ) =  λ/b

Given.

Wavelength = 633nm = 633×10⁻⁹m

Beam diameter is 1mm.

Minimum angular spread due to diffraction (θ) =  633×10⁻⁹m/1

Minimum angular spread due to diffraction (θ) =  633×10⁻⁹m.

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an infinite moderator contains unifonnly distributed isotropic sources emitting s neutrons/cm3 -sec. detennine the steady-state flux and current at any point in the medium.

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The steady-state flux and current at every location in the medium are given by Ф ≅( S(2^1/2)/π*d)* e^-a/(2)^1/2*L. Since there are isotropic sources that are equally distributed and emit s neutrons per cm3/s

According to Fick's first law, which stipulates that diffusion flow is proportional to concentration gradient, steady-state flux diffusion processes are identified by this property. Diffusion coefficient or diffusivity are other names for the proportionality constant, D. It is expressed in m2/sec. J x can be used to represent the one-dimensional case for steady-state flux. The movement of electrical charge carriers like electrons is known as current. Positive and negative locations both experience current flow. The ampere is the SI unit for calculating electrical current (A). The movement of electrical charge carriers like electrons is known as current. Positive and negative locations both experience current flow.

Ф ≅( S/4*π*d)* e^(r/l)/r

Ф ≅( S/4*π*d)* e^-a/(2)^1/2*L

Ф ≅( S(2^1/2)/π*d)* e^-a/(2)^1/2*L

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