Where does the energy in the ecosystem start?

Tracy scuffs her socked feet across a carpet. When she touches a doorknob, she gets a small shock. How did Tracy become charged?

On a hot summer day, you need to leave your house for 30 minutes. To use the least amount of energy, should you turn off your air conditioning system, turn up the thermostat, or leave it set at your normal temperature?

A moving car decelerates for 5.0s and comes to a complete stop. It travels 75m in the process. a) determine its initial speed b) determine its rate of deceleration

Which of the following states of matter has no definite shape but does have a fix volume

In which item is energy stored in the form of gravitational potential energy A) a slice of bread B) a compressed string C) an apple on a tree D) a stretched bow string

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?