Whose contributions to astronomy explained how planets were held in their orbits?

A. Aristotle

B. Copernicus

C. Ptolemy

D. Newton

E. Brahe

F. Kepler

What two forces are balanced in what we call gravitational equilibrium?

Explain why a construction worker who uses a jackhammer on a rock does not produce a metamorphic rock.

Which possible discovery would be attributed to an inorganic molecule? a protein that contains more energy than lipids a fireproofing spray used in firefighting a new energy-efficient fuel source a synthetic polymer that resists degrading

Around midcourse, a velocity adjustment is performed to eliminate the small errors introduced when departing from Earth's orbit. This adjustment is performed using one of the onboard thrusters.

The moment of inertia of a body is 3.0 kg x m^2. when its angular velocity is 6.0 rad/s, its rotational kinetic energy in j is

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

Rasheed runs a football 10 meters east, turns and runs the football 6 meters west. If his velocity during this run is found to be 3 meters/second, how long does this take Rasheed to complete this run?