What is meant by the speed of a car? ?

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal 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.

Sound is a disturbance that travels through a medium as a

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?