All group i metals react with h2o to a form a metal hydroxide and hydrogen gas. which of these will react the fastest?

The density of a liquid could be found by using

The material that keeps its new shape after it is stretched is called?

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?