A 90.0 kg man climbs hand over hand up a rope to a height of 15.2 m. How much potential energy does he have at the top? (PE=mgh)

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Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 10 m/s²

From the question we have

PE = 90 × 10 × 15.2

We have the final answer as

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The "Water boils at the same temperature value on both the Kelvin and Celsius scales# statement is false

Explanation:

1.- The degree symbol is not used on the Kelvin scale because this is an absolute scale, the other scales are relative scales because they used reference points to measure temperature (as water boiling point)

2.- Both scales increases the same temperature as one degree increases.

3.- Kelvin scale doesn't count negative temperatures because it is an absolute scale, which means, the zero is absolute, the coldest temperature you can reach, at this point the molecules stop moving completely, nothing can be more stationary than something that is stopped.

4.- In kelvin water boils at 373, and int celsius at 100°, they are using different reference point to measure temperature