Two kids are roller skating. amy with the mass of 55kg, traveling at 3m/s. jenny who has a mass of 40kg is traveling at 5m/s in the opposite direction. they crash into each other and hold onto each other so now they are skating together, how fast are they traveling? t

m1v1+m2v2=(m1+m2)=v
is the equation needed for this, i need with how to do the steps, it's on my review, and you!

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?