All reactions require activation energy. a. trueb. false

Aparticle travels in a circular orbit of radius 21 m. its speed is changing at a rate of 23.1 m/s2 at an instant when its speed is 37.2 m/s. what is the magnitude of the acceleration (in m/s? ) of the particle?

Energy is the ability to do work which measures what

If the new moon happens on january 15th, what shape will it be on february 6th?