A subway car whose mass is 52,000. kg is traveling with a velocity of 3.4 m/s due north and collides with a second subway car whose mass is also 52,000. kg and is at rest. If the two cars stick together after the collision, what is the velocity of the two cars?

The specific heat of silver is 0.057 calories/gram°c. if 10.0 grams of silver were heated and the temperature of the sample changed by 20.0°c, how many calories of heat energy were absorbed by the sample?

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?

Convection occurs when thermal energy is transferred by the movement of