I really need help please and thank -you which two countries has dominated space exploration during the space race from 1955 to 1975 ​

The msds for glacial acetic acid says that it is a flammable liquid that can severely burn any human tissue it comes in contact with. it reacts with bases, various metals, and strong oxidizing agents. its vapors can form explosive mixtures with air.

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction

What is happening when the water inside a kettle heats up and begins to boil