Would it be more efficient to warm your bed on a cold night with a hot water bottle that contains 1 kg of water at 50 degrees C? Or with a 1-kg gold bar at 50 degrees C? Why?

Explanation:

Heat necessary to raise the temperature of a substance by unit mass of a given substance by a given amount is known as specific heat.

It is known that relation between heat energy, specific heat, and mass is as follows.

           q =

As the specific heat of water is 4.18 and the specific heat of gold is 0.129 . Since, the specific heat of water is greater than the specific heat of gold.

Therefore, we can conclude that water is more efficient to warm your bed on a cold night with a hot water bottle that contains 1 kg of water at 50 degrees C.

he would use the colour black

if you're asking what comes out, it's steam.