Abaseball player throws a baseball. the ball traveled 35 yards before it landed on the ground. the ball stayed in the air for 3.8 seconds. what is the average speed of the ball?

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

3. a lunar exploration vehicle was created by a research team. it weighs 3,000 kg on the earth. it needs an acceleration of 10 m/s2 on the moon. in order to have the same acceleration, what will be the net force acting on the vehicle on the earth?