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77julia77 [94]
3 years ago
7

What is the best explanation of work?

Physics
2 answers:
9966 [12]3 years ago
7 0

Answer:

In  physics, work is defined as a  force  causing the movement—or displacement—of an object. In the case of a constant force, work is the scalar product of the force acting on an object and the displacement caused by that force.

Contact [7]3 years ago
7 0

Answer: option D

Explanation:  In physics, you say that a force is "doing work" when the force is acting on an object and causes a movement in the said object. This means that if you start pushing a wall, and the wall does not move, there is no work generated, indifferent of the amount of force applied.

Under this viewpoint, the right option is D.

"Work occurs when a force acts on an object and causes a displacement of that object."

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Find the current passing through each of the 3 resistors connected parallel to each other as shown in the figure (i1, i2, I3). S
Thepotemich [5.8K]

Answer:

I1 = ε/R1

I2 = ε/R2

I3 = ε/R3

Explanation:

From the image, we see that the resistors are connected in parallel. This means that the voltage passing through them is the same.

Now, formula for current is; I = V/R

In this case, V which is voltage is denoted by ε.

Thus;

I1 = ε/R1

I2 = ε/R2

I3 = ε/R3

3 0
3 years ago
If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have
velikii [3]

Correct answer choice is:

D. A frequency higher than the original frequency.

Explanation:

This is a true case of Doppler's effect. The Doppler effect can be defined as the effect originated by a traveling source of waves in which there is a visible higher variation in pulse for observers towards what the source is progressing and a visible descending shift in rate for observers from what the source is dropping.

8 0
3 years ago
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A greyhound's velocity changes from rest to 19 m/s in 2 seconds. What is the greyhound's average acceleration?
Andrew [12]

It should be b)9.5m/s2

6 0
3 years ago
For your senior project, you would like to build a cyclotron that will accelerate protons to 10% of the speed of light. The larg
viva [34]

Answer:

The magnetic field is 1.16 T.  

Explanation:

speed, v = 10% of speed of light = 3 x 10^7 m/s

diameter, d = 54 cm

radius, r = 0.27 m

charge, q = 1.6 x 10^-19 C

mass, m = 1.67 x 10^-27 kg

Let the magnetic field is B.

The centripetal force is balanced by the magnetic force.  

qvB=\frac{mv^2}{r}\\\\B =\frac{mv}{qr}\\\\B =\frac{1.67\times 10^{-27}\times 3\times 10^{7}}{1.6\times 10^{-19}\times 0.27}\\\\B =1.16 T

6 0
2 years ago
Answer all these questions
Kazeer [188]

Answer:

mechanical waves,

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If the amplitude increases the volume increases and vice versa.

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The type of medium affects a sound wave as sound travels with the help of the vibration in particles.

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The higher the frequency, the shorter the wavelength.

Explanation:

5 0
2 years ago
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