Determine the mechanical energy of this object: 1-kg ball rolls on the ground at 2 m/s a. the ball is on the ground, so the mechanical energy is zero b. 2 j c. 1 j d. 4 j

Which one of the following research methods can show cause and effect

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon