The ratio of the magnitude of the charge of a proton compared to the magnitude of the charge on an electron is A 1:1
B 1:3
C 1:1.63 E18
D 1:1.67 E-27
E 1:9.11 E-31

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

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