1. explain how applied heat works between and at critical temperatures. 2.explain how a refrigerator works to cool down warm objects that would otherwise be room temperature.

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?