How would the light spectrum of Hydrogen on a distant star be described?

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?

Aballet student who learns with the of his instructor is demonstrating learning.