What is the height of the building if the gravitational potential energy is 800 J and the person standing on the top of the building weighs 50 N? GPE = w x h

Modify the equation fδt=δ (mv) to find the force of friction.

Astronomers discover an exoplanet (a planet of a star other than the sun) that has an orbital period of 3.87 earth years in its circular orbit around its sun, which is a star with a measured mass of 3.59 x 1030 kg. find the radius of the exoplanet's orbit.

Protons and neutrons are found within the nucleus of an atom