What did early South American civilization do to promote farming

Which of the foolwing best define net force?

If a glass rod is rubbed with a dry cloth, what kind of charge would it be: A) positive, due to extra protons B) negative, due to protons lost C) positive due to electrons lost D) negative, due to extra electrons

In Pensacola in June, high tide was at noon. The water level at high tide was 12 feet and 2 feet at low tide.

In which situation is chemical energy being converted to another form of energy? A. A lamp plugged into the electric grid. B. A fluttering flag. C. A floating wooden log. D. A burning candle.

Definition of artficial and natural radioactivity

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?