After two hours, 1/16 of the initial amount of a certain radioactive isotope remains undecayed. The half-life of the isotope is:

Non-moving electrical charges are often called A. current. B. voltage. C. static electricity. D. electrical field lines.

Which kind of mechanical wave needs a source of energy to produce it?

A wave has wavelength of 4.8 meters and frequency of 2.5. what is the speed? Velocity = Frequency x Wavelength A. 12 B. 15 C. 1.9 D. 0

What energy transformations from eating an apple to riding your bike?

What force does a trampoline have to apply to a gymnast to accelerate her straight up at? Note that the answer is independent of the velocity of the gymnastâshe can be moving either up or down, or be stationary.

Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?

If you had a positive 8 score on the sit-an-reach test you

65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large deposit of dust that contained substances only found in asteroids.

Near which location in New York State would a geologist have the greatest chance of finding dinosaur footprints in the surface bedrock?

E=mc^2 solve for c E/m m/E sqrt (E/m) sqrt (m/E) E - m sqrt (E-m)