A 39 kg boy runs with a velocity of 3.8 m/s. How much kinetic energy does he have? Then he grabs on to a rope that is hanging from the ceiling, and swings from the end of the rope. How high off the ground will he swing?

Which of the following quantities are units of momentum? (there could be more than one correct choice.) a)n m b) kg s/m c) kg m/'s d)n-s 12 points] e) kg m2/s2

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 .

What can you increase the strength of an electromagnet by