Neglecting air resistance, a 8 kg bowling ball released from rest from a building and falls for 45 m. What is the magnitude of the ball's velocity as it is about to hit the
sidewalk.

Select all the correct answers. which three statements about electromagnetic radiation are true?

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)

The center of the milky way most likely contains a. empty space. b. a red giant star. c. a globular cluster. d. a supermassive black hole.