Special cases: 23 initially stationary cart: suppose the second cart is initially stationary, v2i = 0 and the first cart comes in with a velocity v1i = vwhat are (v1f/v) and (v2f/v) in each of the following cases? type of collisionm 1=m 2m 1 ˃˃ m 2m 1˂˂m 2 head-on collision: suppose the two carts collide with velocity v, v1i = v and v2i = − v. what are (v1f/v)and (v2f/v) in each of the following cases? type of collisionm 1=m 2m 1 ˃˃ m 2 elastic? ? inelastic? ?

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?