Calculate the kinetic energy of a 2kg ball moving at 5m/s

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

The mini-refrigerator fire was most likely caused by what type of wiring?

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?