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neonofarm [45]
3 years ago
13

Compare and contrast power and work.

Physics
1 answer:
cestrela7 [59]3 years ago
6 0

Answer:

<u>Comparison</u>

Displacement and force are factors of both work and power

Work=<u>Force× Displacement</u>

power=(Force×Displacement)/time

Therefore power is the derivative of work with respect to time.

<u>Contrast</u>

Work is defined as a product of force and distance while power is the rate at which the work is done.

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7 0
3 years ago
How a measuring scale measure our weight
Aloiza [94]

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5 0
3 years ago
An ultrasound unit is being used to measure a patient's heartbeat by combining the emitted 2.0 MHz signal with the sound waves r
alexandr402 [8]
Hi there, 
for this question we have:
Signal 2.0 MHz = Emitted so we can call it f_e
and we need the Reflected = f_{r}
In this question, we have a source which goes to the heart and a reflected which comes back from the heart and we need the speed of the reflected.
So you should know that the speed of reflected is lower than the source(Emitted). 
we also know: ΔBeat frequency(max) = 560 Hz = f_{b}
so we have: 
f_{e} - f_{r} = f_{b}
so frequency of Reflected is: 
2.0 × 10^6 Hz - 560 Hz = 1.99 × 10^6 Hz = f_{r}
now you know that Lambda = v/f 
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Lambda = 1540(m/s) / 2.0 × 10^6 Hz = 7.7 × 10^-4 m 
=> v_{max} = (lambda)(f_{r} 
=> 7.7 × 10^-4m (1.99 × 10^6Hz) = 1532 m/s 
so the v_{max} is equal to 1532 m/s :)))
This question is solved by two top teachers as fast as they could :))
I hope this is helpful
have a nice day

8 0
3 years ago
What is the best description of a mechanical wave?
gizmo_the_mogwai [7]

Answer:

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Explanation:

8 0
3 years ago
Which is an action/reaction force pair? check all that apply.
Vesna [10]

Answer:

According to Newton's third law, for every action force there is an equal (in size) and opposite (in direction) reaction force. Together, these two forces exerted upon two different objects form the action-reaction force pair.

Explanation:

Sana makatulong ^_^

3 0
2 years ago
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