Coins were developed as a medium of exchange because other items like cows, grain, and land were more difficult to move from place to place.

According to the law of conservation of energy what ultimatly happens to the total amount of energy in the universe?

An argument against the validity of evolutionary theory says that there are too few transitional forms representing the gap between any two living species that supposedly share a common ancestor.

A wave that moves its medium parallel to its direction of travel is a

The frequency of a wave is 560 Hz. What is it's period

A normal walking speed is around 2.0 m/s. how much time t does it take the box to reach this speed if it has the acceleration 5.54 m/s2 that you calculated above?

Write two examples (mathematical expression) of physical laws that change inversely with the square of the distance.

What units must be used to express the temperature in the equation for the ideal gas law? explain?

Which region of the Sun is typically about 6,000 C?

How well does the infographic ""Plastics in the Ocean"" present a solution to the problem it describes?

Which of the following would be a good question that could be scientifically investigated? what is the best advice a parent can give a child what is the most appropriate number of dogs per household do cherry popsicles freeze slower than orange