Question 5 of 10 Two billiard balls, each with a mass of 0.21 kg, collide with each other on a
pool table. Before the collision, one ball is moving north at 1.7 m/s and the
other ball is moving south at 2.6 m/s. What is the momentum of this system
after the collision?
A. 0.19 kg-m/s south
B. 0.19 kg-m/s north
O C. 0.90 kg-m/s north
D. 0.90 kg-m/s south

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.

What organization and environment is described above?

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.