What term refers to the gases that are produced by combustion in a rocket engine and leave the rocket engine through a nozzle? A. surplus gases
B. ignition gases
C. exhaust gases
D. waste gases

An astronomer at the equator measures the doppler shift of sunlight at sunset. from this, she calculates that earth’s tangential velocity at the equator is 465 m/s. the centripetal acceleration at the equator is 3.41  10 2 m/s 2 . use this data to calculate earth’s radius.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above