your weight is the result of a gravitational force of the earth on your body. what is the corresponding reaction force?

Adding additional bulbs to a series circuit increases the resistance of the entire circuit.

The correct option is A.

An easy circuit that enables electrons to move between a or more resistors is called a series circuit. A resistor is anything that consumes energy from a cell (battery). The resistor in a circuit is typically a light bulb. A series circuit offers exactly one route for electric current to go between any two places. These networks have the benefit of making each constituent very reliant on other components.

In a series circuit, the amount of voltage is the total of the single value drops across each component, and also the current flowing through each component is the same.

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The temperature of the junction H2 is and the heat currents flowing in these three rods is H1 = 2KA/3L (Ti - To).

The thermal conductivity of a fabric is a degree of its capability to behavior warmth. it's miles usually denoted by k, lambda, or kappa. warmth switch occurs at a decrease rate in materials of low thermal conductivity than in materials of excessive thermal conductivity.

Calculation:-

H2 = H1/2

K A ( T initial - T final)/L

= 2KA ( T i T f)/L

T = (T1 + 2To)/3

H1 = 2KA/3L (Ti - To)

By symetry and law of comservation of energy.

H1 + H2 + H3 = O

H1 = H2 + H3

H2 = H3. (same properties)

H1/2 = H2 + H3

Rod 1

H1 = K(T i - T j)/L

Rod2

H2 = KA(T j - T o )/L

Thermal conductivity is a belongings that describes how properly warmness flows thru a substance. The better the thermal conductivity, the higher a substance conducts warmness.

The lower the thermal conductivity the higher, because the material conducts much less heat strength. Thermal conductivity is a assets of the cloth and does not consider thickness. Different thicknesses of the identical fabric nevertheless have the identical λ-fee.

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If it takes 4.0 N to stretch a spring 6.0 cm and if the spring is then cut in half, then force it takes to stretch one of the halves 3.0 cm is also 4N.

When a spring is stretched, its length changes by an amount x from its equilibrium length, and it exerts a force F = -k x in a direction towards its equilibrium position.

Given, F= 4 N

x= 6 cm

As we know that, F= k x

4= k * 6

k = 4/6

when , x = 3 cm, K become 2 times= 2 x

Now, Force= 2* 4/6 * 3

Force to stretch= 4 N

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If the moon were five times more distant from earth than it is now, the gravitational force would decrease.

How are distance and gravitational forces related?

Inversely related to the square of the distance between the two objects is the gravitational force, which is directly proportional to the masses of the two objects.

In other words, as objects get heavier, their gravitational pull is stronger; however, as objects get farther apart, their pull is weaker.

Gravity's pulling power weakens as a pair of objects are separated by more space.

As one gets farther away from a planet, the gravitational field weakens.

Distances measured from the Earth's centre have a clear inverse square relationship with the dilution of gravity that occurs as you move away from the planet's surface.

For, masses, M₁ and M₂,  the gravitational constant G, and the increasing distance R ,the gravitational force F is given by, F = G[(M₁*M₂)/R²]

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17.1 W is the power dissipated in the wire.

Power is the amount of work completed in a given amount of time, or time spent working. The joules per second (J/s)-based SI unit of power is the Watt (W).

In light of the fact that the potential difference is V = 1.5 V.

The wire is l = 1.5 meters long.

The area of the cross-section is A = 0.6m.

The wire has a 5.25 resistance.

R=ρ l/A

=5.25×10^(-8)×1.5/(0.6×10^(-6) )

=0.13125Ω

The formula to calculate power is

P=V^2/R

Substituting the values, the power will be

P = ((1.5)^2)/0.13125

P = 17.1  W

Thus, the power dissipated in the wire is 17.1 W

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If a ceiling fan's 18-inch blades rotate at a rate of 45 revolutions per minute, its linear speed in feet per hour would be 5400 rad per hour.

Thus, the angular speed times the distance r gives the linear speed of a point on the object. The units of measurement are meters per second and meters per second. where = speed in radians/sec

The pace at which the object rotates is its angular speed, which is measured in rotations per minute, degrees per minute, radians per hour, etc. The linear speed is the rate at which a point on the edge of an object moves in a circle around the item's center.

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The rate at which velocity changes is called acceleration. (Attensity exists when velocity varies.) If a moving object changes speed.

A motion's acceleration is the rate at which it changes from one velocity to another. A velocity's rate of change with respect to time is referred to as its acceleration. The amount and direction of acceleration are both properties of a vector quantity.

A velocity change's acceleration is measured. Acceleration is the measure of how quickly a velocity changes with time. The acceleration measure used in SI is M/s2.

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The percentage of mechanical energy of the oscillator lost in each cycle is 5.91 %.

The formula for mechanical energy in an oscillator is given by

E = 1/2 kA²

It is the sum of elastic potential energy and kinetic energy.

Amplitude is nothing but the maximum displacement moved by a point on vibrating body.

It is given that the amplitude A decreases by 3%, then

(E₂ - E₁) / E₁ = [1/2 k (A₂²- A₁²)] /(1/2 k A₁²) = (A₂²- A₁²)/ A₁² = (97² - 100²)/ 100²

⇒ 5.91% of the mechanical energy is lost in each cycle.

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Precisely, water has to absorb 4,184 Joules of heat for the temperature of one kilogram of water to increase 1°C. Conduction equations can be used to model heat transfer between a fluid and a solid wall.

The linear temperature profile of a stationary layer of liquid clinging to the wall is considered to be the sole cause of the temperature differential between the fluid and the wall. Heat is transmitted between hot and cold fluids through a solid wall in a heat exchanger. Process streams or separate sources of heat, like fluids or sources of refrigeration, may be the fluids. Corrosion, deposits of reaction products, or organic growths can all eventually decrease heat transfer. Fouling resistances provide a quantitative explanation for these phenomena. combining various film coefficients to create an overall heat transfer coefficient.

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The yellow red stain that occurs on some rock surfaces is the result of Oxidation Form of weathering

A molecule, atom, or ion undergoes oxidation when it loses electrons as a result of a process.

When a molecule, atom, or ion's oxidation state is raised, oxidation takes place. When there is an increase in electrons or a drop in an atom, molecule, or ion's oxidation state, the process is known as reduction.

According to the given information

When you see crimson stains on rock, you are looking at the results of oxidation, which is when oxygen causes chemical changes. Steel and other iron-containing materials oxidise, which sets off a chemical reaction that causes the material to rust. Similar chemical weathering occurs in rocks.

The yellow red stain that occurs on some rock surfaces is the result of Oxidation Form of weathering

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The statement that does not describe fission is: Stable, lightweight nuclei start the process.

What is Fission?

A bigger atom undergoes fission when a neutron collides with it, causing it to excite and split into two smaller atoms, also referred to as fission products. This process is also known as Nuclear Fission. Additionally, additional neutrons are emitted, and these can start a chain reaction. Each atom splits, releasing a huge quantity of energy.

Hence, The statement that does not describe fission is: Stable, lightweight nuclei start the process.

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The statement that does not describe fission is: Stable, lightweight nuclei start the process.

What is Fission?

A bigger atom undergoes fission when a neutron collides with it, causing it to excite and split into two smaller atoms, also referred to as fission products. This process is also known as Nuclear Fission. Additionally, additional neutrons are emitted, and these can start a chain reaction. Each atom splits, releasing a huge quantity of energy.

Hence, The statement that does not describe fission is: Stable, lightweight nuclei start the process.

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The initial velocity of the car when the brake was initially applied is 6.3 m/s.

option D is the correct answer.

The velocity of the car when the brake was initially applied is calculated as follows;

Mathematically, kinetic energy formula is given

K.E = ¹/₂mv²

where;

mv² = 2 K.E

v² = ( 2 K.E ) / ( m)

v = √ [  ( 2 K.E ) / ( m) ]

Substitute the given parameters and solve of the initial velocity of the car when the brake was applied.

v = √ [  ( 2 x 23,180 ) / ( 1168) ]

v = 6.3 m/s

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The complete question is below:

A 1,168-kg car comes to a stop without skidding. The car's brakes do -23,180 J of work

to stop the car.

Which of the following was the car's velocity when the brakes were initially applied?

A. 3.2 m/s

B. 1.7 m/s

C. 5.1 m/s

D. 6.3 m/s

the average power input to the wheel during this time interval, power  P = I ω f  2 /2 T

What is average power?

It is the average amount of work done or energy converted per unit of time. The average power is often simply called "power" when the context makes it clear. The instantaneous power is then the limiting value of the average power as the time interval Δt approaches zero.

Power  P = torque * average angular speed

             = I α ( 0 + ω f ) / 2

where  I = moment of inertia

         α= angular accleration = ω f / T

So, power P = I ω f  2 /2 T

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When [tex]x=0.33A[/tex] the system's potential energy is 1/9 of the total mechanical energy.

Explanation:

In a simple harmonic motion the mechanical energy is conserved and is expressed by the relation

      Em = ½ k A²

At all points of movement the mechanical energy and

      Em = K + U

remember that potential energy is

      U = ½ k x²

they ask us for the point where

       U = 1/9 Em

 we substitute

      ½ k x² = 1/9 (½ k A²)

      x = √1/9     A

      x = 0.33 A

Energy may take on a variety of shapes. Examples of these include: electrical energy, sound energy, chemical energy, nuclear or atomic energy, light energy, heat energy, mechanical energy, gravitational energy, and so on. Each form has the ability to shift or transform into the others.

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The maximum magnetic field strength is 6.22 × 10⁻⁴ T. The result is obtained by dividing the maximum electric field strength by the speed of the wave.

The ratio of electric field strength to magnetic field strength in any electromagnetic wave is equal to the speed of light.

E/B = c

Where

If the speed of the medium wave is 0.75c and the maximum electric field strength is 140 kV/m. The maximum electric field strength would be

B = E/0.75c

B = 140.000/0.75c

B = 140.000/(0.75 × 3 × 10⁸)

B = 14×10⁻⁴/2.25

B = 6.22 × 10⁻⁴ T

Hence, the maximum electric field strength in the electromagnetic wave is 6.22 × 10⁻⁴ T.

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The projectile hit the ground 3,992.97 m in front of the release point.  The projectile speed when it hits the ground is 438.5 m/s

When a level-flying aircraft fires a projectile horizontally in the direction of travel, it means:

v₁ = speed of the plane = 500 km/h

v₁ =500 x 1000 km = 138.89 m/s

                3600s

v₂ = velocity of bullet with respect to plane = 290 m/s

v = projectile velocity relative to the ground

v = v₁ + v₂ = 428.89 m/s

The projectile moves horizontally, but has projectile motion that moves horizontally and vertically along a parabola curve.

In the vertical direction, the projectile moves with un uniform motion.

uy = initial vertical velocity = 0 m/s

h = height = 850m

g = gravitational acceleration = 9.8 m/s²

2h = 1/2 gt²

2 × 850 = 9.8 × t²

t = √1,7009.8

t = 9.31 seconds

The projectile moves horizontally with constant velocity.

distance

d = vt

d = 428.89 × 9.31

d = 3,992.97m

when the projectile almost touches the ground

vertically

maximum speed

vy = gt = 9.8 × 9.31 = 91.24 m/s

horizontally

vx = v = 428.89 m/s

projectile final velocity

v² = vx² + vy²

v² = 428.89² + 91.24²

v² = 183,946.63 + 8,324.37

v² = 192,271.004

v = 438.5 m/s

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The pressure reading of the pitot tube is 12.0 mm hg at a speed of at 830 km/h will be 187.45 mm of Hg.

It is given that,

The pressure reading of the pitot tube =12 mm of Hg

[tex]$\mathbf{p}_1=12 \mathrm{~mm}$[/tex] of Hg

Velocity at this height [tex]$\mathrm{v}_1=210 \mathrm{~km} / \mathrm{h}$[/tex]

Pressure reading at height [tex]$\mathrm{h}_2=$[/tex]

Velocity at this height [tex]$\mathrm{v}_2=830 \mathrm{~km} / \mathrm{hr}$[/tex]

Now applying the concept of the Bernoulli principle

[tex]$$\mathrm{p}_1+\frac{1}{2} \rho \mathrm{v}_1^2+\rho \mathrm{gh}_1=\mathrm{p}_2+\frac{1}{2} \rho \mathrm{v}_2^2+\rho \mathrm{gh}_2$$[/tex]

From the above equation it is clear that

[tex]$$\begin{aligned}\Delta \mathrm{p}_1^2 & =\frac{1}{2} \rho \mathrm{v}_1^2 \\\Delta \mathrm{p}_2 & =\frac{1}{2} \rho \mathrm{v}_2^2 \\\frac{\Delta \mathrm{p}_2}{\Delta \mathrm{p}_1} & =\frac{\frac{1}{2} \rho \mathrm{v}_2^2}{\frac{1}{2} \mu \mathrm{v}_1^2} \\\frac{\mathrm{p}_2}{\mathrm{p}_1} & =\frac{\mathrm{v}_2^2}{\mathrm{v}_1^2}\end{aligned}$$[/tex]

Hence, the value of the Pressure is given in terms of mm of Hg will be:

[tex]$$\begin{aligned}& \frac{\mathrm{h}_2}{\mathrm{~h}_1}=\frac{\mathrm{v}_2^2}{\mathrm{v}_1^2} \\& \mathrm{~h}_2=\mathrm{h}_1\left(\frac{\mathrm{v}_2^2}{\mathrm{v}_1^2}\right) \\& \mathrm{h}_2=\frac{12(830)^2}{210^2}=187.45 \mathrm{~mm} \text { of } \mathrm{hg}\end{aligned}$$[/tex]

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A chemical reaction took place absorbing thermal energy from the pack

Ligaments, which are tenacious bands of fibrous tissue that hold two bones together in your joints, can be stretched or torn during a sprain. An ankle sprain is the most typical type of injury. The first course of treatment entails rest, ice, compression, and elevation.

A direct or indirect injury (trauma) that misaligns the joint, overextends it, and occasionally tears the supporting ligaments results in a sprain. A sprain can result from various injuries, for instance: rolling your ankle while running, switching directions, or coming down from a jump

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The building process until planetesimals were formed. This process is called accretion.

What is accretion?
In physics and astronomy, accretion is indeed the process by which more matter, usually gaseous matter, inside an accretion disc, is gravitationally drawn into a massive object. The majority of astronomical objects, including planets, galaxies, and stars, are created through accretion processes. Otto Schmidt first put forth the idea that Earth and other terrestrial planets created from meteoric material in 1944. William McCrea then advanced the protoplanet theory in 1960, and Michael Woolfson later advanced the capture theory. The modern Laplacian theory was created in 1978 by Andrew Prentice, who revived the original Laplacian ideas regarding planet formation.

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The gases in the cell is under 8333.3 Pa of pressure.

Pressure is the term used to describe the physical force exerted on an object. Per unit area, a perpendicular force is delivered to that same surface of the objects. F/A is the primary formula for tension . Pascals are a unit of pressure (Pa). Relative, atmospheric, disparity, and gauge pressures are various types of pressure.

Briefing:

By using the first law of thermodynamics, we can find the work done by the gas:

ΔU = Q -W

where in this problem:

ΔU = 530kJ  is the change in internal energy of the gas

 Q = 830KJ is the heat absorbed by the gas

W is the work done by the gas (positive if done by the gas, negative otherwise)

Therefore, solving for W,

W = Q - ΔU

   =  830 - 530

   =  300KJ

   =  [tex]3.00 .10^{5}[/tex] J

So, the gas has done positive work: it means it is expanding.

Then we can rewrite the work done by the gas as

[tex]W = p(V_{f} -V_{i} )[/tex]

where:

[tex]V_{i} = 52 m^{3}[/tex] is the initial volume of the gas

[tex]V_{f} = 88 m^{3}[/tex] is the final volume

P is the pressure

And solving for P, we find

[tex]V_{f} = V_{i} + \frac{W}{P}[/tex]

[tex]88 = 52 + \frac{3.00.10^{5} }{P}[/tex]

[tex]88-52 = \frac{3.00.10^{5} }{P}[/tex]

[tex]36 = \frac{3.00.10^{5} }{P}[/tex]

[tex]P = \frac{3.00.10^{5} }{36}[/tex]

[tex]P = 8333.3 Pa[/tex]

Therefore , the pressure of the gas is 8333.3 Pa

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The difference in height of the liquid surface on two sides of the U-tube is 24 cm.

Oscillating U-tube is a method for calculating fluid densities. It has a measuring scale and a U-shaped glass tube. The principle behind this method is that when pressure is applied to one side of the tube, it causes the liquid to move.

Let h be the difference in the height of the liquid surface and H is the height of the oil. We know that the pressure at all horizontal points in a line is the same.

Therefore, pressure at point A = pressure at point B. Then, equation 1 is [tex](H+h)\rho_wg=H\rho_{\text{oil}}g[/tex]

Here, ρ(w) is the density of water, and ρ(oil) is the density of oil. Then, the density of oil is,

[tex]\begin{aligned}\rho_{\text{oil}}&=80\%\times \rho_w\\&=0.8\rho_w\end{aligned}[/tex]

Substitute the above equation in equation 1.

Then,

[tex]\begin{aligned}(H+h)\rho_{w}g&=H\times0.8\rho_{w}g\\H+h&=0.8\times H\\h&=0.8H-H\\&=-0.2H\end{aligned}[/tex]

The negative sign in the above equation indicates that the oil surface is at a higher height.

Given, the volume of oil is V(oil)=120mL=120×10⁻⁶ m³. Area is A=1 cm² = 10⁻⁴ m². Also, the volume of oil = volume of cylinder = AH

Then,

[tex]\begin{aligned}120\times10^{-6} &=AH\\H&=\mathrm{120\times10^{-2}\;m}\\&=\mathrm{1.2\;m}\\|h|&=0.2\times\mathrm{1.2\;m}\\&=\mathrm{0.24\;m}\\&=\mathrm{24\;cm}\end{aligned}[/tex]

The answer is 24 cm.

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Your mass would be the same on the moon as it is on Earth, which is 60 kg. Despite the moon and Earth having different gravitational fields, mass is a constant indicator of the quantity of matter present.

This suggests that option b) is the proper one.

What is the gravitational difference between the moon and the earth?

The moon won't draw things toward itself with the same force as the Earth since it has a lot less mass than the latter. In other words, even if your mass stays the same, you would weigh less if you traveled to the moon!

The average gravity at Earth's surface is 9.8 meters per second. For example, when something is thrown over the top of a building or the edge of a cliff, it falls at a speed of 9.8 meters per second each second. The surface gravity of the Moon is around 1/6th as strong, or 1.6 meters per second every second.

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I understand that the question you are looking for is:

If your mass is 60 kilograms on earth, what would your mass be on the moon?

a) 10 pounds

b) 60 kilograms

c)60 pounds

d)10 kilograms

e)360 kilograms

The nuclear equation for Uranium-235 decays into thorium-231 is as follows:

²³⁵U₉₂ → ²³¹Th₉₀ + ⁴He₂

Helium also known as alpha particle is been emitted during the decay.

Radioactive decay is the release of energy in the form of ionizing radiation. Because ionizing radiation can affect the atoms of living organisms, it poses health risks by damaging genetic tissue and DNA. Emitted ionizing radiation may contain alpha particles. Atoms decay radioactively if there is a low-energy nuclear configuration available for transition. The actual decay events of single atoms occur randomly and are not the result of the atom's age or aging. Some known radioactive decay is:

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The phrase LASER is an acronym of mild Amplification by way of stimulated Emission of Radiation. it's miles a device to provide a sturdy, monochromatic, collimated and tremendously coherent beam of mild. it really works in the phenomenon of 'stimulated emission'.

Laser light is exceptionally monochromatic.

Laser resurfacing can lessen the advent of high-quality lines inside the face. it may also treat loss of skin tone and improve your complexion. Laser resurfacing cannot cast off immoderate or sagging pores and skin.

(ii) Laser light is fairly coherent.

since the emission of all photons are in section, the laser beam is coherent.

(iii) Laser mild is relatively extreme

The depth of laser beam may be very high due to the fact all the photons within the beam are coherent.

(iv) Laser light is highly directional.

A laser beam is fantastically directional. mild from other assets can be made parallel beam by using a lens or a reflect,but the beam divergance is an awful lot more than that for laser light.

Those properties of laser mild enables it for use in surgical treatment and cut via metals.

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In each trial the material and hence the index of refraction in the region between the barrier and the screen is 487.8 nm

Given D=2.05,d=5

m=1,Y1=20cm

we have d sinθ = mλ

λ=dYn/mD=

5*10⁻⁶*20*10⁻²/1*2.05

λ=487.8 nm

In physics, refraction is the direction change brought on by a wave's speed change as it passes through one medium and enters another. In deep water, for instance, waves move more quickly than in shallow water. When two materials with different densities, such as air and glass, are in contact, light waves change their speed. Refraction is the term for the resultant change in direction that results.

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The lateral string has a tension of 1.89*10⁻³N, the vertical string has a tension of 7.84 * 10⁻⁴ N, and indeed the ratio of both strings is 2.41.

The force produced that whenever a load is placed at a few of the ends of a fabric in a direction away from the material's cross-section is known as the tension force. It's common to describe a strain as a "grabbing" force.

(a). The net force acting on the strand is T =mg

Here,

T = Tension in the strand

m = mass of the spider

g = acceleration due to gravity

Substitute 8.00×10⁻⁵ kg for m and 9.8m/s² for g in equation.

T = mg

T = 8.00×10⁻⁵ * 9.8m/s²

T = 7.84 * 10⁻⁴ N

Hence, the tension in the vertical strand is 7.84 * 10⁻⁴ N

(b). The net force in the vertical direction is-

2Tsin∅ = mg

Here, g seems to be the acceleration caused by gravity, r is really the stiffness with in strand, m is the spider's mass, and ∅ is the angle the strand is making.

Substitute 8.00×10⁻⁵ kg for m, 9.8m/s² for g and 12º for ∅ in equation.

2Tsin∅ = mg

2T (sin12º) = 8.00×10⁻⁵ kg * 9.8m/s²

T = 8.00×10⁻⁵ * 9.8/ 2sin12º

T = 1.89*10⁻³N

Hence, the tension in the horizontal string is 1.89*10⁻³N.

The ratio of vertical and horizontal string is,

= 1.89*10⁻³N/7.84 * 10⁻⁴ N

= 2.41

Hence, the ratio of vertical and horizontal string is 2.41

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The complete question is-

(a) Calculate the tension in a vertical strand of spider web if a spider of mass 8.00×10⁻⁵ kg hangs motionless on it. (b) Calculate the tension in a horizontal strand of spider web if the same spider sits motionless in the middle of it much like the tightrope walker in Figure 4.17. The strand sags at an angle of 12º below the horizontal. Compare this with the tension in the vertical strand (find their ratio).

The Electric force between electron and proton is 0.25 x 10⁻¹⁰ N.

Even though these forces (electrons repelling one another, electrons being drawn to the nucleus, etc.) exist within an atom, they are in equilibrium in the absence of any other external influences.

If the charges were incompatible, i.e. Two charges will attract one another if there is one positive and one negative.

Consider the two charges to be a proton and an electron that are equally spaced apart. The amount of charge on an electron is equivalent to the charge on a proton.

This means that unless a change occurs, no movement is produced solely by electrostatic force.

[tex]F=-K[X-x][/tex]

F=-0.5 [1.0 -0.5]x 10⁻¹⁰

F=0.25 x 10⁻¹⁰ N

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Buildings can affect the surface albedo.

The surface is the outermost or uppermost layer of a physical item or area. it is the element or place of the object which could first be perceived by an observer through the usage of the senses of sight and contact and is the component with which other materials first engage.

A surface is the outermost layer of any physical object. it is the part of the object that may be perceived by an observer using their experience of sight and touch and is the portion with which surrounding substances first engage.

The chemical and mechanical residences include chemical composition, grain, hardness, energy, and inhomogeneities.

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The average speed of 121 cars traveling on to an interstate in a random sample was 65 mph. The same values (60.688, 69.312) are used to calculate the 95 percent confidence range for the value of.

The pace at which a distance changes over time is referred to as speed. It has a dimension of time-distance. As a result, the fundamental unit of time as well as the basic unit for length are combined to form the High silica content of speed.

You can determine an object's speed if you know how far it moves in a given amount of time. For instance, an automobile is moving at 70 miles per hour if it covers 70 miles in an hour.

Briefing:

The sample size is n= 121

The sample's average speed is 65 mph.

σ = 22mph

100 should be the new sample size other factors remain unchanged so,

given The sample size is n= 100

σ = 22mph

The 95 % of confidence interval for is calculated as follows:

(65 - 4.312 ,65 +4.312)

(60.688 , 69.312) ≅(61 ,69)

similar to (61.08, 68.92) ≅(61 ,69)

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Purple colored pattern results when Ninhydrin binds with amino acid within fingerprint residue which allows for fingerprint development. 5th option.

Ninhydrin reacts with the amino acid in the fingerprint deposit to produce a dark-purple product (eccrine secretion). Amino acid helps for the development of fingerprints on paper. It turns dark purple when deposited on paper.

Ninhydrin is a chemical reagent and is most widely used for fingermarks detection on porous surfaces like cardboard and paper. The purple product is often referred to as Ruhemann's purple. It was used in early times for criminology.

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