A150 kg mass is on a cliff 50 m high. what is its potential energy? 9 how much work is done moving a 2.5 kg book to a shelf 3.0 m high? 10. a 150 pound man runs up a stairway 25 feet above ground level in 10 s. how much work did the man do?

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

An atom that has gained or lost electrons is called an _