Ametal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0
degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion
for this metal?

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?