Fill in the blank. i'm to tired to finish.

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?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

What are igneous intrusions and extrusions