What is the gravitational potential energy of a book with a mass of 0.30 kg on a 1.0 m high desk?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Calculate the capacitance of a system that stores 2.0 x 10^-10c of charge at 100.0 v. use c=q/v. a. 2.0 x 10^-12 f b. 2.0 x 10^-8 f c. 5.0 x 10^11 f d. 5.0 x 10^7 f

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation