Which of the following produces the highest pitch? A sound wave with a frequency of 20 Hz
A sound wave with a frequency of 200 Hz
A sound wave with an amplitude of 2 m
A sound wave with an amplitude of 0.2
None of the above

If a clock aboard a space ship traveling at 0.900 c of the speed of light relative to earth chimes once at the beginning of the hour and again when it reads one hour later, how much time would an observer on earth say elapsed between the two chimes?

Who was the first scientist to measure speed as distance over time?

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3