How does the gravitational potential energy of the water ball released compare with the gravitational potential energy of the water balloon
when it returns almost to its release position? Record your evidence.

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

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.

The force it would take to accelerate an 900-kg car at the rate of 6m/s2