A perpetual motion machine can never be bill because it is not possible to eliminate

a. momentum

b. inertia

c. elasticity

d. friction

Which of the following does not exist in a command economy A: goods B: individuals C: collectivization D: consumer sovereignty

Both X-rays and gamma rays have higher frequencies than ultraviolet rays True or False

Astrophysicist Neil deGrasse Tyson steps into an elevator on the 29th floor of a skyscraper. For some odd reason, there is a scale on the floor of the elevator.

1) Calculate the torque required to accelerate the Earth in 5 days from rest to its present angular speed about its axis. 2) Calculate the energy required. 3) Calculate the average power required.

Which statement best describes a relationship amongst hypotheses, theories, and laws? A hypothesis is used to explain laws and theories. A law is used to explain a hypothesis and theories. A hypothesis combines several theories.

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)

For resonance to occur, the object must experience a frequency equal to its what? amplitude period wavelength natural frequency