Stars contain enough hydrogen for nuclear fusion to happen for of years. what word completes the gap? 1. Thousands
2. Hundreds
3. Millions​

What is binding energy and separation energy

When an object moves in uniform circular motion, the direction of its acceleration is a) in the same direction as its velocity vector. b) in the opposite direction of its velocity vector c) is directed toward the center of its circular path. d) is directed away from the center of its circular path. e) depends on the speed of the object.

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