Mike (m = 40 kg) is riding his bike (m = 15 kg) at a velocity of +4.0 m/s. Mike decides to jump off his bike and achieves a new velocity of +5.0 m/s. Calculate the velocity of the bike after the collision.

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.