Explain the relationship between brightness and distance. Explain by relating the brightness of the light to the energy of the light waves.

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

Avector of magnitude 2 cannot be added to a vector of magnitude 3 so that the magnitude of the resultant is a. zero b. 1 c. 3 d. 5 e. 7

Of is j/kg·k. if a 2.6 kg of isk to k,is ?