Answer:
(a) 441 W (b) 0.59 hP
Explanation:
Given that,
Mass of a woman, m = 60 kg
Height of a staircase, h = 15 m
Time, t = 20 s
(a) We need to find the power she expend. Work done per unit time is called power. It is given by :

( b) Since, 1 hP = 745.7 W
P = 0.59 hP
Hello!
I included a link that might help you in terms of how the problem is broken down.
https://www.slader.com/discussion/question/a-tank-is-shaped-like-an-upside-down-square-pyramid-with-base-of-4m-by-4m-and-a-height-of-12m-how-fa/
However, the answer is:
The height increases at 3/2 m/sec
Answer:
B. Wave B has greater intensity and transfer more energy.
Explanation:
Amplitude of wave B is more and it seems to be compact in less period of time as compared to Wave A.
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Please clarify the question, and add more information before I can answer that, I’d need to know the amount of carbon atoms.
The correct option is A) work.
Work is said to be done by a force when a force is exerted on an object and the the object on which the force is exerted moves in the direction of the force.
The amount of work done is given by the product of the force and the displacement made by the object.
Option (B) is incorrect, since Watt is the unit of power.
Option (C) is wrong, since joule is the unit of work or energy.
Option (D) is wrong, since power is the rate at which work is done.