Two sources of sound, Sį and S2, emit sound waves in phase at a frequency of 1000 Hz. They are separated by a distance d 2.0 m. If you were to move a detector along the x-axis starting at S1, how far would it have to be moved before it detects no sound at all? Take the speed of sound to be 343 m/s.

Answers

Answer 1

If we were to move a detector along the x-axis starting at S1, it would have to be moved 11.6m far before it detects no sound at all.

A sound wave is what?

A sound wave is a pressure wave, which may be conceptualized as variations in pressure over time. Transverse waves include sound waves. The tines of a tuning fork must transfer air from the fork to one's ear in order for one to hear the sound of the fork. The majority of sound waves, although not all of them, are produced by some sort of vibrating object.

What two forms of sound waves are there?

The characteristics of sound waves should be the starting point for studying sound. Transverse and longitudinal waves are the two fundamental forms of waves, and they are distinguished by how they move through space.

Given,

The two sources, [tex]S_{1}[/tex] and [tex]S_{2}[/tex] separated by a distance is d = 2.0m

[tex]S_{2}P = \sqrt{x^{2} +2.0^{2} }[/tex]

       = [tex]\sqrt{x^{2} +4}[/tex]

For destructive interference

[tex]S_{2}P - S_{1}P[/tex] = λ/2                                                    

 λ=ν/f

Given:

frequency  f = 1000hz

speed of sound ν = 343m/s

   =[tex]\frac{343}{1000} = 0.343m[/tex]

[tex]\sqrt{x^{2} +4} -x[/tex] = [tex]\frac{0.343}{2}[/tex] = 0.1715

⇒ [tex]\sqrt{x^{2} +4}[/tex] = 0.1715 + x

⇒ [tex]x^{2}[/tex]+4 = [tex](0.1715+x)^{2}[/tex]

           =      [tex](0.1715)^{2} + x^{2} + 2(0.1715)(x)[/tex]

⇒ 4 = [tex](0.1715)^{2}[/tex]+ 0.343 [tex]x[/tex]

⇒ [tex]x = \frac{4-0.1715^{2} }{0.343}[/tex]

       = 11.6m

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Related Questions

sort the galaxy rotation curves according to whether they would support or refute the hypothesis that galaxies are made up only of visible matter.

Answers

The claim is refuted -rotation curve 1, -rotation curve 3, -rotation curve 2 -supports Rotation Curve 4, Rotation Curve 6, and Rotation Curve 5

Curves is a particular kind of workout.

You can work every significant muscle area with Curves since it combines stretching, cardio, and upper- and lower-body strength training routines. It may be done by people of all fitness levels and employs hydraulic resistance gym equipment created specifically for ladies.

To Curves, may guys go?

Although males are permitted to join in some jurisdictions, Curves fitness and weight reduction facilities are focused solely on and built for women. Competitors of the clubs include Spa Lady and Lucille Roberts, two chains that cater only to women.

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Nuclear decay occurs according to first-order kinetics. What is the rate constant for radon-220, which has a half-life of 55. 6 seconds?.

Answers

The rate constant for radon-220, which has a half-life of 55. 6 seconds is 0.012.

We know that half life of first order reaction is : [tex]t_{1/2} = 0.693/k[/tex]

where k = rate of reaction.

Given half life = 55.6 sec

Putting this value in above equation we get k = 0.012

i.e. The rate constant for radon-220, which has a half-life of 55. 6 seconds                is 0.012.

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a proton is at rest at the plane vertical boundary of a region containing a uniform vertical magnetic field b. an alpha particle moving horizontally makes a head-on elastic collision with the proton. immediately after the collision, both particles enter the magnetic field, moving perpendicular to the direction of the field. the radius of the proton's trajectory is 4.0 r. find the radius of the alpha particle's trajectory as a factor of r. the mass of the alpha particle is four times that of the proton, and its charge is twice that of the proton.

Answers

The radius of the alpha particle's trajectory is 4.0 r.

What is elastic collision?

An elastic collision is one in which the system does not experience a net loss of kinetic energy as a result of the collision.

Given:  the mass of the alpha particle is four times that of the proton, and its charge is twice that of the proton.

After elastic collision, the speed of the  proton and the alpha particle will be in a ratio of 2: 1.

Let, the speed of the proton be2 v then the speed of the alpha particle be v.

So, the proton's trajectory is = 2mv/qB = 4.0 r

Hence, alpha particle's trajectory is = (4m×v)/(2qB)

=2mv/qB  

=4.0 r

= 4.0r.

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two particles of mass m and 3m are moving with the same speed v in a vacuum at right angles with the particle of mass m moving in the x-direction and the particle of mass 3m moving in the negative y-direction. a

Answers

The kinetic energy of the two particles will be equal if they are travelling at the same speed in a vacuum. The equation: gives the particle's kinetic energy.

KE = (1/2)mv^2

m is the particle's mass, v is its speed, and KE is its kinetic energy.

In this instance, the particle with mass m will have the following kinetic energy:

KE = (1/2)m*v^2

And the kinetic energy of the particle with mass 3m will be:

KE = (1/2)3mv^2

     = (3/2)mv^2

The two equations may be made to equal one another and we can solve for v because the particles have the same kinetic energy.

(1/2)mv^2 = (3/2)mv^2

(1/2)*v^2 = (3/2)*v^2

1/2 = 3/2

Since there is no solution to this equation, two particles travelling in a vacuum cannot be moving at the same speed if one of them has a mass.

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calculate the maximum force, in newtons, exerted by the blood on an aneurysm (a ballooning in a major artery), given that the effective area of the aneurysm is 18.5 cm2.

Answers

36.99N

Given

Maximum blood pressure  P = 150 mm

Effective area of the aneurysm a = 18.5 cm2.

Expression for the maximum force exerted by blood on an aneurysm is,

f =P * a = (150 mm Hg* (133.322 N/m²/ 1 mmHg)) * ( 18.5 cm² * (1 m² /10000cm²)) = 36.99N

The pressure is computed as the ratio of acting force on an object and the surface area of the object where the force is directed. The pressure is usually measured in terms of Pascal and blood pressure in mm of Hg.

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determine the moments of inertia of the rectangular area about the x- and y-axes and find the polar moment of inertia about point o.

Answers

The definition of moment of inertia allows for the following results for the moment of inertia with respect to each axis:

1-Iₓ = m r²

2-Iy=9m r²

3-Iz=10m r².

What exactly is moment interia?

The expression yields the moment of interia as a scalar quantity.

Sol-

I =∫ r² dm

Where I is the moment of inertia, m is the body's mass, and r is the distance from the axis of rotation.

In the case of point particles, the expression is as follows:

I = m r²

In this case, we calculate along each coordinate axis.

a) The distance is x = r with respect to the x axis, and the moment of inertia is

Iₓ = m r²

indicate the distance in relation to the y-axis

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energy conservation with conservative forces: a 60-kg skier pushes off the top of a frictionless hill with an initial speed of 4.0 m/s. how fast will she be moving after dropping 10 m in elevation? air resistance is negligible.

Answers

As stated in the query, 14.57 m/s is the velocity at which one would go after descending 10 m in height.

What exactly is a frictionless encounter?

A Frictionless Guest Experience: What Is It? Any stage in a customer's relationship with a business where they experience friction is when they run into a roadblock that brings them down or makes them unhappy. Customer gives seamless service, in the simplest fundamental way, entails monitoring their path and improving their encounter.

Briefing:

Here we can use the concept of mechanical energy conservation

Ui + KEi = Uf + KEf

mgh₁ + 1/2 mv²i = mgh₂ + 1/2 mv²f

Now we know that,

vi = 4m/s

m = 60kg

h₁ = 0m

h₂ = -10m As its going down

now from above equation we will have

n + 1/2(60)(1)² = (60)(9.81)(-10)+1/2(60)v²f

180 = -5886 + 30v²f

v²f = 212.2

vf = 14.57m/s

So his speed will be 14.57m/s

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given a diffraction grating with 300 lines per mm, what is the spacing d between lines? as- suming that the lines in the grating are manufactured with a tolerance of 1%, what is the estimated uncertainty in the line spacing d

Answers

The spacing between the lines is 3.33 X 10⁻³ mm and the estimated uncertainty in the line spacing is 3.33 X 10⁻⁵ mm.

Diffraction grating = 300 lines/mm

Thus,

The spacing between the lines = d =

= d = 1/300 lines/mm

= d = 3.33 X 10⁻³ mm

A grating consists of many slits, or lines, close together. In a grating, the spacing between adjacent lines is constant. Gratings are also used to produce interference patterns. When waves are incident on a grating all of the lines act as coherent sources of the waves.

Now, the uncertainty in the lines spacing is = Δ d =

= Δd = d (tolerance)

= Δd =  3.33 X 10⁻³ X 1%

= Δd = 3.33 X 10⁻⁵ mm

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a noisy machine in a factory produces a decibel rating of 72 db. how many identical machines could you add to the factory without exceeding the 85 db limit?

Answers

There are 10 identical machines could you add to the factory without exceeding the 85 dB limit.

Calculation:-

sound leve in decibel is:

β dB = 10 log ( I / Io )

where I is the intensity of sound

It is the relative intensity

72 = 10 logs ( I /10⁻¹²)

8  = log ( I /10⁻¹²)

10⁸  =  I / 10⁻¹²

I  =  10⁸ . 10⁻¹² =  10⁻⁴  W /m2

If the sound level is 85 dB, the number of identical machines is n.

85 = 10 logs ( n I / Io )

=  10 logs ( n . 10⁻⁴ / 10⁻¹² )

9  =  log ( n . 108 )

10⁹ = n. 10 8

n = 10.

so  n  = 10 .

Sounds below 70 dB are considered safe for hearing. This is the sound of a normal conversation between two people. A noise level of 80 or 85 dB will damage your hearing over time. 70 decibels is as loud as a washing machine or dishwasher. Medium noise level. 70 dB of noise is not considered harmful to human hearing.

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A long narrow uniform stick of length D and mass ms = m lies motionless on frictionless surface of ice puck of mass Mlp m slides without spinning on the ice with a velocity Vo toward the stick; collides elastically with one end of the stick, and rebounds in the opposite direction with velocity Vf After the collision, the center of mass of the stick moves with velocity V$, and the stick rotates about the center of mass with angular velocity Ws . Throughout the process, from finite time before the collision to finite time after the collision, the angular momentum of the rod and puck system is constant bout which of the following points? Select that apply; The center of mass of the rod-puck system The center of mass of the rod The center of mass of the puck The fixed point on the ice where the center of mass of the system was located when puck collided with the rod Any fixed point in space Angular momentum is not constant around any point

Answers

Throughout the process, from a finite time before the collision to a finite time after the collision, the angular momentum of the rod and puck system is constant about any fixed point in space.

The condition of conservation of angular momentum of a system about a point is that net torque about that point of the system must be zero. The point that has zero net torque is any fixed point in space.

τ = I α

I = L / ω

τ = L ω / ω t

τ = L / t

Since L is constant, τ = 0

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is the total momentum before the collision equal the total momentum after the collision. if not, what are the possible differences as to why

Answers

The overall momentum of the system can be thought of as being conserved because the total momentum before and after the collision is the same. As a result, the system receives no net external impulse.

Momentum is a vector quantity that is influenced by the object's direction. During collisions between objects, momentum is a relevant concept. The total momentum before a collision between two objects equals the total momentum after the impact (in the absence of external forces).

The law of conservation of momentum is this. It holds true in every collision. According to the principle of momentum conservation, momentum is only modified by the action of forces as they are outlined by Newton's equations of motion; momentum is never created nor destroyed inside a problem domain.

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he three blocks (from left to right in the figure) have masses of 3.38 kg, 0.702 kg and 7.80 kg. the leftmost block has a velocity of 3.51 m/s toward the right, the center block is stationary, and the rightmost block as a velocity of 2.79 m/s toward the left. assuming movement toward the right is positive, what is the velocity of the center-of-mass of this system as pictured (prior to collision)? give your answer with the appropriate sign.

Answers

-0. 833m/s is the velocity of the centre-of-mass of this system, prior to the collision.

What is Centre-of-mass?

The unique location where the weighted relative position of the distributed mass accumulates to zero is known as the centre of mass of a distribution of mass in space (also known as the balance point). At this location, a force can be applied to produce a linear acceleration alone, not an angular acceleration.

What is Collision?

In physics, the abrupt, violent meeting of two bodies in direct contact is referred to as an impact. Examples of such bodies are two pool cues, a golf club and a ball, a hammer and a nail head, two railroad cars when linked, or a falling object and a floor. The force and the amount of time the objects are in touch, in addition to the materials the two objects are made of, have an impact on the outcome of the impact. It is generally knowledge that a hard steel ball dropped on a steel plate would rebound almost to the original position from where it was dropped, while a ball made of putty or lead will not.

What are the Calculations?

There are typically 3 masses named

m1= 3.38kg

m2= 0.702kg

m3= 7.80kg

Here m2 stays stationary hence its velocity (v2= 0)

Let the final velocity be V

Value of m1 + m2 + m3 = 3.38 + 0.702 + 7.8 = 11.882kg

A/Q V= m1v1/11.882 + m2v2/11.882 + m3v3/11.882

m1v1/11.882= 3.38 * 3.51/11.882= 0.998

m3v3/11.882= 7.8 * (-2.79) /11.882= -1. 831 ( here -ve sign is taken as the velocity of m3 is towards the left which is negative)

Hence, after simplifying V= m1v1/11.882 + m2v2/11.882 + m3v3/11.882 the final answer is -0. 833m/s

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a 1,325 kg car rolls from rest down a 10.0 m tall hill. it then moves across a level surface and runs into a spring-loaded

Answers

To find maximum spring compression we assume no energy losses due to friction.

Here, the initial and final kinetic energy of the car is zero.

We know that, Total Energy= kinetic energy+ Potential Energy

Since the initial and final kinetic energy of the car is zero, here initial potential energy of the car-spring-earth system completely converts to elastic potential energy.

By the law of conservation of energy,

K1 +U1 = K2 + U2

i.e, (KE+PE, + PE) = (KE + PEg+PES) =

Here KE=0 and Potential energy after reaching ground(PE, = 0) =  

0 + mgh + 0 = 0+0+1/2kx- 0

mgh = (1/2kx2) =

2= 2mgh/k

mg = 1325.(9.8) = mg = 1325.(9.8) = 12985N ) = =

We can round off 12985N to 13000N for easy calculation.

-2 2 = 2 * 13000 * 10 1.0 * 106 0.51m

(b) To find the maximum acceleration of the car after contact with the spring,

We apply Newton's 2nd law,

ma= (-kx = )

​​​​​​a = (-kx/n -m)  

Multiply the above equation with g/g

a = a= (-kug/mg) = (-kxg/u

a = -(1.0 * 10%) * (0.51) * (9.8)/13000 = -380m/s? = *

a = 380m/s

A level curve is a plane curve where f has a constant value. A plane is a surface in XYZ space where f has a constant value. A level curve or surface is sometimes called a level set. The plane is the equipotential surface of the Earth's gravitational field. It is a curved surface and all its elements are perpendicular to the vertical line.

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the resistance in a series rcl circuit is doubled. (a) does the resonant frequency increase, decrease, or remain the same? (b) does the maximum current in the circuit increase, decrease, or remain the same?

Answers

The resistance in a series rcl circuit is doubled.:

(a) The resonant frequency will decrease. The resonant frequency of an RLC circuit is inversely proportional to the total resistance. As the resistance increases, the total resistance increases and the resonant frequency decreases.

(b) The maximum current in the circuit will remain the same. The maximum current in an RLC circuit is determined by the magnitude of the source voltage and the total resistance. As the resistance increases, the total resistance increases, but the source voltage remains the same, so the maximum current remains the same.

What is resistance?
The opponents to current flowing through an electrical circuit is measured by resistance. The Greek letter omega (Ω) represents the unit of measurement for resistance, known as ohms. Georg Simon Ohm (1784–1854), a German physicist who investigated the connection between voltage, current, and resistance, is the name given to the unit of resistance. Ohm's Law is attributed to him as its creator.

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initially, the translational rms speed of a molecule of an ideal gas is 461 m/s. the pressure and volume of this gas are kept constant, while the number of molecules is doubled. what is the final translational rms speed of the molecules

Answers

The stated statement states that the molecules' final maximum rate of translation is 270 m/s.

What does physics define as speed?

The rate at which the position of an object shifts in any direction. Speed is described as the ratio of the area traveled to the time required to cover that distance. Time is a scalar number since it just has a heading but no magnitude.

Briefing:

temperature at the start = T

v = √(3RT/M) = 467 m/s

temperature = T' later

note PV = mRT/M = NRT/NA

so NT = constant,

now N is tripled, T reduces to T' = T/3

so v will change to v' = √(3RT'/M) = v*√(T'/T) =v*√(1/3) = 270 m/s

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g a 4 kg ball is thrown straight up in the air. what is the net force acting on the ball when it reaches its maximum height? what is the ball's acceleration at this point?

Answers

The weight of the ball is the only force pushing down on a ball that has been tossed into the air approximately half its maximum height.

How does science define force?

At this point, referring to a force as a push or a pull is perfectly appropriate. An object does not "have in it" or "contain" a factorOne thing experiences a force from another. The idea of a force encompasses both living and non-living things.

What is an example of force?

An illustration would be to push or forcefully shove a door. As a vector quantity, effort has both magnitude and a direction.. According to Newton's second law, force equals the "net of a body's natural mass and acceleration."

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What best describes the greatest height a ball will bounce off the ground after being dropped from a height of 60 centimeters?

Less than 60 centimeters, as the ball transforms a part of its potential energy into heat energy
Less than 60 centimeters, as the ball transforms some of its heat energy into potential energy
More than 60 centimeters, as the ball transforms some of its heat energy into potential energy
More than 60 centimeters, as the ball transforms some of its potential energy into heat energy

Answers

The statement that best describes the after effect of the ball is that the ball would be Less than 60 centimeters, as the ball transforms a part of its potential energy into heat energy. That is option A.

What is law of conservation of energy?

The law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another.

There are various types of energy which include the he following:

chemical energy, mechanical energy, nuclear energy, gravitational energy, light energy, radiant energy, sound energy, motion energy,heat energy, and electrical energy.

Potential energy is defined as the type of energy that is found in the body that is at rest. Therefore when the ball is dropped from a height, it would bounce with less than 60 centimetres as the potential energy is transformed to heat energy.

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A glass has some ice and some liquid water in it. What happens if this glass is heated?.

Answers

If this glass is heated ice will turn into water

Explain forms of water.

Ice, water, and gas are all forms of water that can exist (vapour or gas). Ice, a solid, can melt into water with the addition of heat (a liquid). Ice forms when heat is removed from water, a liquid (a solid). We refer to a shift in a substance's state as occurring when liquid water becomes a solid or a gas. The molecules of the water don't change, even when its physical appearance does.

Solid water is what an ice block is. The ice turns into liquid water when heat (an energy source) is introduced. It's melted since it's at 0 degrees Celsius. If you keep heating the water, it will transform into water vapour, which is water that has turned gaseous.

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What can your employer do to protect you from overhead power lines? select the 3 answer options that apply.

Answers

To protect you from overhead power lines:

Keep a safe distance away from lines when working.

Ask the power company to ground and de-energize the electrical lines.

The only way to avoid being electrocuted is to wear PPE.

Have insulated sleeves, commonly referred to as "eels," installed over electricity wires by the utility provider.

What exactly do overhead power wires mean?

To carry electrical energy across long distances, an overhead power line is a structure used in electric power transmission and distribution. For three-phase power, it typically consists of one or more uninsulated electrical cables suspended from towers or poles.

The more precautions taken, the better in order to prevent the employee from being electrocuted by the electricity lines. The safety of the personnel must be ensured by taking all necessary precautions. Particularly when it comes to electrical wiring, problems might arise in a variety of ways.

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Calculate the average time for the tablet to dissolve in
room temperature water. Record the average time in
Table A.



Trial 1


50.00



Trial 2

52.00

Trial 3

51.00
What is the average time it took for the tablet to dissolve
in room temperature water?
seconds

Answers

In water that was 22 °C in temperature, a tablet took an average of 28.3 seconds to dissolve.

What is a drug?

Drugs are any chemicals that have an impact on how living creatures and the microbes that infect them (such as bacteria, fungi, and viruses) operate. The study of pharmaceuticals, or pharmacology, covers all facets of a drug's use in medicine, such as its mechanism of effect, physical & chemical characteristics, metabolism, treatments, and toxicity.

A drug is any substance that, when eaten, affects an organism's physiology or psychology. Foods and other items that aid in nourishment are typically kept apart from medications. Drugs can be ingested orally, smoked, injected, inhaled, applied topically with a patch and suppository, or broken down sublingually.

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Answer:

51 seconded

Explanation:

if the root-mean-square speed of the gas molecules is 162 m/s , what is the pressure of the gas? express your answer in pascals.

Answers

The force that the gas applies to the container boundaries is known as the gas's pressure. Along the given volume, the gas molecules move at random.

Explain about the pressure of the gas?

They bump into the ground and each other as they move. The pressure of a gas is therefore a measurement of the average linear momentum of the moving molecules in a gas because the impact of each individual gas molecule is too minute and challenging to observe. The pressure exerted on the wall is normal to it and acts perpendicularly; the gas's viscosity affects the force's tangential (shear) component.

The quantity of gas particles, the capacity of the container, and the temperature of the gas all affect how much pressure is applied to a contained gas. The pressure will rise as the volume of gas particles in a container increases. The pressure will rise as a container's volume increases.

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a projectile is thrown upward with speed v by the time its speed has decreased to 3v/4 it has risen a height h what is the maximum height reached by the projectile if it is projected at an angle of 60 with the horizontal

Answers

The maximum height attained by the projectile in terms of h is 12h/7.

What is the maximum height reached by the projectile?

The maximum height attained by the projectile is calculated by applying the following formula as shown below.

H = v² sin²θ / 2g

where;

v is the initial speed of the baseballg is the acceleration due to gravityθ is the angle of projection of the ball

H = ( v² ( sin 60 )² ) / 2g

H = ( v² x ³/₄ ) /2g

H = 3v² / 8g

To solve for the maximum height attained by the projectile in terms of h is calculated as follows;

vf² = vi² - 2gh

2gh = vi² - vf²

h = (vi² - vf²) /2g

where;

vi is the initial velocity of the projectile = vvf is the final velocity of the projectile = 3v/4g is acceleration due to gravity

h = (v² - (3v/4)²) / 2g

h = (v² - 9v²/16) / 2g

h = (7v²/16) / 2g

h = 7v² / 32g

7v² = 32gh

v² = 32gh/7

The maximum height becomes;

H = 3v² / 8g

H = 3(32gh / 7) / 8g

H = (3 x 32 gh) / (7 x 8g)

H = 12 h / 7

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what step in the laser printing process is responsible for conditioning the imaging drum in preparation for receiving an electrical charge?

Answers

Yes this information is correct about electrical resistance.

What is electrical resistance?

Electrical resistance is a force that counteracts the flow of current.

Sol- when two lamps are connected in parallel to a battery, the total electrical resistance that the battery senses is more than the resistance of either . Beacuse In a parallel circuit each bulb is in its own circuit. As bulbs are added the resistance in the circuit decreases since each circuit is another pathway for electrons to move from one end of the circuit to the other.when two lamps are connected in series to a all the  battery the electricals resistance that the battery's senses is the more than the resistence of either lamp.

As each bulb is connected in parallel to the battery of the , each has thatbsame potential difference across by to the it as the all of  voltage of across the battery of to the terminals. All of other to the potential by  differences are zero, as we know all the wires have to the zero resistance.

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if a household appliance is operating on 110 volts and electricity is flowing with a current of 0.2 amperes in this appliance, how many watts are consumed?

Answers

The electric power consumed by the household appliance is determined as 22 watts.

What is the electrical power consumed in the household?

The electrical power consumed by the household appliance that is operating on 110 volts and whose electricity is flowing with a current of 0.2 amperes is calculated as follows;

P = IV

where;

I is the current flowing in the household applianceV is the voltage supplied to the household appliance

P = 0.2 A  x  110 V

P = 22 W

Thus, the electric power consumed by the household appliance is a function of current and voltage.

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what would a permanent magnetic substance be called? a. soft magnet c. hard magnet b. fast magnet d. quick magnet please select the best answer from the choices provided a b c d

Answers

A permanent magnetic substance be called a hard magnet.

Option C is correct.

What is a hard magnet?

Hard magnets, also referred to as permanent magnets can be described as those magnetic materials that retain their magnetism after being magnetized.

Examples of magnet function include the following:

Mechanical to mechanical attraction and repulsion.Mechanical to electrical, such as generators and microphones.Electrical to mechanical also found in motors, loudspeakers, charged particle deflection.Mechanical to heat found in as eddy current and hysteresis torque devices.

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a 4 kg ball is thrown straight up in the air. what is the net force acting on the ball when it reaches its maximum height?

Answers

A 4 kg ball is launched vertically into the air. The net force exerted on the ball at its highest point is 39.24N.

What is  net force?

In mechanics, the net force is the vector sum of forces acting on a particle or object. The net force is a single force that replaces the effect of the original forces on the particle's motion.

Given data

Ball mass m=4 kilogram

Gravitational acceleration is 9.81 m/s^2 , or g.

The location of the ball has no bearing on the net force applied to it in vertical projectile motion. As a result, the ball experiences a net downward force throughout its travel, and the size of this force is equal to the mass times the acceleration caused by gravity.

[tex]\begin{aligned}& F_{\text {net }}=m g \\& F=4 * 9.81 \\& F=39.24 N\end{aligned}[/tex]

Therefore, the ball is subject to a net force of 39.24 N.

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What can one say about the size of the magnification of a single convex mirror?
It is greater than one It is equal to one. It is less than one.

Answers

A convex mirror can never provide more than one in magnification effect. This is so because a convex mirror's image of the thing is smaller than the object itself.

When an object is held 30 cm away from a convex mirror, the image it creates is half the size of the actual object. A convex mirror is a kind of spherical mirror in which the reflecting surface is the protruded portion of the sphere; in other words, the reflecting surface of these mirrors protrudes outward in the direction of the incident light source. Enlarging something's seeming size—rather than its actual size—is known as magnification. A calculated value known as "magnification" is used to measure this enlargement.

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(a) is positive or negative work done by a constant force f with arrow on a particle during a straight-line displacement d with arrow if the angle between f with arrow and d with arrow is 27°?

Answers

The work done by a constant force f with arrow on a particle during a straight-line displacement d with arrow if the angle between f with arrow and d with arrow is 27° is positive.

Paintings done are elaborated in one way it consists of both forces exerted on the frame and the whole displacement of the frame. This block is preceded via a steady pressure F. The cause of this force is to move the frame a sure distance d in a direct route in the direction of the force.

To express this concept mathematically, the paintings W is identical to the pressure f times the gap d, or W = fd. If the force is being exerted at an attitude θ to the displacement, the paintings completed is W = FD cos θ.

The paintings accomplished through pressure are described to be the product of thing of the pressure inside the route of the displacement and the value of this displacement. formula. work can be calculated with the aid of multiplying force and Distance in the route of pressure as follows. W = F × d.

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The distance between two consecutive crests in a wave train produced in a string is 5 cm. If two complete waves pass through any point per second. The velocity of the wave is15cm^-110cm^-12.5cm^-15cm^-1

Answers

The velocity of the wave is 10m/s .

A wave's velocity is determined by multiplying its frequency by its wavelength. The wavelength of a wave is defined as the space between two successive crests or troughs, and the frequency is the reciprocal of the wavelength in time.

We are given that,

The distance between two consecutive wave = λ = 5cm

The no. of waves = n = 2

The velocity of the wave can be calculated by the formula,

ν = nλ

v = 2 ×​ 5 = 10cm/sec

Therefore the velocity of the wave would be 10 m/s .

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Two units of measurement for energy are calories and joules. The measurement of 355 J is the same amount of energy as ___________.

Answers

Two units of measurement for energy are calories and joules. The measurement of 355 J is the same amount of energy as 84.84 calories.

Energy in physics is the ability to perform work. Different shapes, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc., may be assumed by it. Other examples of energy being transferred from one body to another include heat and work. Energy is always distributed after it has been transported in accordance with its type. Thus, heat transfer could result in thermal energy, whereas work could result in mechanical energy.

Motion is a trait shared by all forms of energy. For instance, if a body is moving, it has kinetic energy. Due to the object's design, which incorporates potential energy, a tensioned object, like a spring or bow, has the ability to move even when at rest.

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