For stars to form, the temperature of the hydrogen in a nebula must be more than 14 million Kelvin. How did gravitational attraction help achieve these high temperatures?

Will you chech and finish these for me, because i am stumped with them.

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

Which of the following is an example of units for speed