13. A burglar alarm is wailing with a frequency of 1200. hertz. What
frequency does a cop hear who is driving towards the alarm at a speed of
40.0 m/s? The air temperature is 35.0 oC.

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

Which of the following is the best name for mgcl2