What would happen to the speed of a sound wave if it moved from a cooler room to a warmer one

Of is j/kg·k. if a 2.6 kg of isk to k,is ?

During a car accident, a 125kg driver is moving at 31m/s and in 1.5s is brought to rest by an inflating air bag. what is the magnitude of the change in momentum to the driver

Aplane's average speed between two cities is 600 km/h. if the trip takes 2.5 hours, how far does the plane fly?