Amy counts the wave crests traveling down a stretched string. five wave crests pass amy in two seconds. what is the frequency of the wave?
a. 5.0 hz
b. 2.5 hz
c. 10 hz
d. 2.0 hz

Which of the following represents an upside-down image? o a. +doo b. -doo c. +mo d.-m

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j