Carbon-14 has a half-life of 5730 years after how many half lives will 120 g of carbon-14 decay to 15 g

A. One

B. Two

C. Three

D. Four

Energy that is caused by an object's position or motion is called

A man does 500 J of work pushing a car a distance of 2 m. How much force does he apply? Assume there is no friction. A. 250 N B. 1000 N C. 125 N D. 500 N

You buy a 75 watt light bulb. the label means that

Which scientists supported the heliocentric model of the solar system? Check all that apply. a. Aristotle b. Copernicus c. Galileo Kepler d. Ptolemy

When an object is totally immersed in water, it's weight is recorded as 3.1N if it's weight in air is 4.9N calculate the upthrust acting on this object

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read more, less or the same weight when you are standing on one foot?

The period T of a simple pendulum depends on the length L of the pendulum and the acceleration of gravity g (dimensions L/T^2). (a) Find a simple combination of L and g that has the dimensions of time.

What is an example of the theory that the best adapted organisms for an environment are the ones most likely to survive

What does not affect the apparent brightness of a star?