# How to evaluate how fast water in a bottle is heating when moved rapidly?

Let's assume I have a bottle of cold (> 0°C, but close) water and the environment has about 25°C.

I am eager to drink this water and I am moving the bottle to reach at least 15°C. I am thinking about the following related to temperature increase:

• water inside gets some kinetic energy from movement and its slowing down should generate some heat (I cannot figure out what else happens to the energy lost due to slowing down)
• water hits the somewhat warmer bottle walls and should get some heat

I am interested if this phenomena contribute to the heating of the water and if this can significantly help the water heat up (e.g. it may help reach the desired temperature two times faster than just let the water heat up due to environment).

Question: How to evaluate how fast water in a bottle is heating when moved rapidly?

Note: I am not interested in exact equations, but rather in physical phenomenon explanations and some order of magnitude.

• You need to be more specific on move rapidly. Temperature is a measure of random kinetic energy. – paparazzo Jan 25 '18 at 18:34
• @Paparazzi - by "rapidly" I mean as fast as possible a human being can perform without using a device. – Alexei Jan 25 '18 at 18:46
• Apparently you did not get the random point. Can't help you. – paparazzo Jan 25 '18 at 18:48