Suppose you have two toy cars. each has a mass of 0.04 kg . the cars have tape on their bumpers that will cost them to couple together. one car is stopped on the track. the other car, traveling at a velocity of 4 m/s, hits the first car. what is the momentum of the coupled cars? answer asap!

What type of nuclear decay causes the atomic number of an element to increase by 1?

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 .

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.