What is a pure substances

You took a running leap off a high diving platform. You were running at 3.1 m/s and hit the water 2.4 seconds later.

The force of gravity on a person or object at the surface of a planet is known as?

Is it possible to walk for ten seconds at high speed and have 0 velocity? If so, provide an example. If not, explain why.

Which of these would be best explained by the Doppler effect? A) the change in frequency as you shorten a guitar string. B) the change in pitch heard as an ambulance approaches you. C) the change in volume as a train pulls away from the station.

If we consider a gallon of gas as having 100 units of energy, and 25 of those units are used to move the car, what law of thermodynamics accounts for the other 75 units of energy? Answer the first law the second law

Two fire trucks with sirens speeds towards and away from an observer. Which statement is true involving the Doppler effect observed by the observer?

What warm ocean currents keep the NC coast warm, even if it is winter

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.

What would happen if water could not condense into the atmosphere

How did rutherford's experiment show that thomson's plum pudding model was incorrect?