An ice skater glides for two meters across ice is work done or no work done

A water pump pumps 3 kg of water every second from the bottom of a well to the top of the well 50 m above. If the pump uses 2000 W of electrical power to accomplish the task, what is the efficiency of the pump

A material used for electrical wiring must have what?

A cannon, located 60.0 m from the base of a vertical 25.0-m-tall cliff, shoots a 15-kg shell at 43.0° above the horizontal toward the cliff.

Liquid water has surface tension, has a high specific heat, and functions effectively as a solvent for polar covalent and ionically bonded molecules. What feature of water imparts these properties?

If a 20 gram bird qnd a 0.001 gram mosquito are moving at the same speed, which has a higher kinetic energy? Why?

Which of the following is a true statement? * Waves do not transport matter through which they travel Waves can transport matter through solids, liquids and gases, but not through empty space.

What happens to the amplitude of a sound wave when energy transfer is increased? A As the transfer of energy is increased, the amplitude increases causing the sound to get louder.

Why do two hydrogen atoms bond to form a hydrogen molecule

Suppose the gravitational force between two spheres is 100 N. If the distance between the spheres is halved, what is the new gravitational force between them?

Ilya and Anya each can run at a speed of 8.00 mph and walk at a speed of 3.20 mph. They set off together on a route of length 5.00 miles.