Author Question: You roll a ball off a table and at the same time drop a second ball straight down from the edge of ... (Read 38 times)

biggirl4568 · **on:** Jul 28, 2018

You roll a ball off a table and at the same time drop a second ball straight down from the edge of table. The second ball reaches the ground ____________ the first ball reaches the ground.
a. before
b. at the same time that
c. after
d. before or after, depending on the masses,
e. cannot be determined

Question 2

A schematic of a simple laser is shown here. Which of the following are characteristics of light produced by a laser?
a. Very narrow range of wavelengths.
b. Highly directional beam.
c. Very intense beam.
d. Light that is coherent.
e. All of the above.