What would be an example of kinetic energy 4 questions

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

When you turn on a battery-operated device, an electrical circuit is

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.