An electric buzzer is activated, then sealed inside a glass chamber. when all of the air is pumped out of the chamber, how is the sound from the buzzer affected?

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

Which governments provide garbage collection services to homes and businesses

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?