When the universe was 380,000 years old, its thermal radiation spectrum consisted mostly of When the universe was 380,000 years old, its thermal radiation spectrum consisted mostly of

Which of the following are appropriate acceleration units?

The energy equivalent of the rest mass of an electron is

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