A. for a beam of light of wavelength 650 nm, what is the energy of a single photon in the beam?

What is the temperature in degrees celsius of a substance with a tempature of 49k

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?

Aball horizontally thrown from a cliff at 8m/s