If the two objects stick together after the collision, will they be moving to the right, to the left, or not at all?

If the two objects stick together after the collision, will they be moving to the right, to the left, or not at all? Explain your answer.A friend is standing on a giant skateboard that is initially at rest. If you ignore frictional effects with the floor, what is the momentum of the skateboard if your friend walks to the right on the skateboard with a momentum of 150 kg.m/s? What is the momentum of the skateboard-person system?What happens to the average speed of the molecules of a gas as it is heated?Is a sauna at a temperature of 190 F hotter or colder than one at 85 C?