A science student drops a rock a mine shaft. If it takes 3.0 seconds for the rock to hit the bottom of the shaft, what is the speed of the rock just before impact? (Acceleration of the falling object is 9.8 m/s^2

Why might compound gear trains be better than two gears alone?

Energy from various sources is considered to have been derived from sun. Do you agree? Do justify.

George created an advertisement for a retail store that sold clothes. He added a discount in the form of a coupon that the customers had to redeem at the store within the next week. Which advertising feature did George use in his advertisement?

S the right ascensions of two stars at a location. Name of star Right ascension Star 1 2 hours Star 2 4 hours 20 minutes What is the degree difference between the two stars that rise at the location?

Electricity is the flow of?

Light, dry snow is called powder. Skiing on a powder day is different than skiing on a day when the snow is wet and heavy.

Light from the sun reaches the earth in 8.3 minutes. In how many minutes does the light from the sun reach venus

For a fixed amount of gas, if the absolute temperature of the gas is doubled, what happens to the pressure of the gas?

Which actions most likely cause the domains in a ferromagnetic material to align?

A ball is thrown horizontally from the top of a tower at the same instant that a stone is dropped vertically. Which object is traveling faster when it hits the level ground below if neither of them experiences any air resistance?