What is the frequency of a wave when it has a wavelength of 2.17 m and is travelling across a rope at a speed of 31 m/s? a 10.1 Hz
b 14.3 Hz
c 11.7 Hz
d 16.2 Hz

A wave oscillating on a string has a wavelength of 0.25 m and a frequency of 1.85 Hz. What is the speed of this wave?

a. 1.210 m/s
b. 2.050 m/s
c. 0.2915 m/s
d. 0.4625 m/s

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix. b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds. c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer. d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.