What kind of energy transformation occurs when the skaters board falls back to the ramp

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.