(b) What is the magnitude and direction of its velocity after collision? (c) Calculate the change in momentum of the molecule during the collision if it has a mass of 80 x 10 LE- (d) 3.0 x 10* particles of mass 4.0 x 10% Ag strike a glass window at a velocity of 500 mr If they all make clastic collisions with the window in a time of 30mrs, calculate the pressure they exert on the window if it's area is 2m