Sound travels faster through solids and liquids than it does through gases because particles are together in solids or liquids than in gases. sound also travels fastest through elastic materials.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

3. a lunar exploration vehicle was created by a research team. it weighs 3,000 kg on the earth. it needs an acceleration of 10 m/s2 on the moon. in order to have the same acceleration, what will be the net force acting on the vehicle on the earth?

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly