A man climbs a ladder.which quamtities can be used to calculatethe useful power of the man
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Ответ:
Explanation:
Power is the rate at which work is done. It is expressed as:
Power =
To find the power of the man climbing the ladder, we must know the work he is doing and the duration of the work done.
Work done = force x distance
Since he climbs,
Force = weight = mg (mass x acceleration due to gravity)
distance = height = h
Power =![\frac{mgh}{t}](/tpl/images/0930/2461/632f2.png)
t is the time
If we know these parameters, we can find the power.
Ответ:
32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.
33: answer is c
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