What causes something to speed up as it rolls down a hill

Water droplets tend to have a spherical, round shape. Explain this fact in terms of the polar nature of water molecules.

What would the potential of a standard hydrogen electrode (s. h. e.) be under the given conditions? [h+]=0.46 mph2=1.9 atmt=298 k?

Kevin, whose mass is 80 kg, is moving along at a velocity of 4 m/s. He doubles his velocity by going down a hill. How much kinetic energy does he have after going down the hill? J

A disgruntled autoworker pushes a small foreign import off acliff with a height of h. the vehicle lands a distance away fromthe cliff. Determine how fast the vehicle was pushed off thecliff.

How to detect an acid / base?

Which of the following elements is the most reactive? Beryllium Calcium Magnesium Barium

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is: