What is the wavelength of a sound wave with a speed of 331 m/s and a frequency of 500 Hz?

Aroller coaster car moving at a velocity of 30 meters/second has a momentum of 2.5 x 10^4 kilogram meters/second. what is its mass?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates