In order for fusion to begin during the birth of a star, there needs to be a certain amount of A. mass. B. charge. C. density. D. volume.

James Joule (after whom the unit of energy is named) claimed that the water at the bottom of Niagara Falls should be warmer than the water at the top, 51 m above the bottom.

If you ride your bicycle down a straight road for 500 m then turn around and ride back your distance is your displacement a. Greater than b. Equal to c. Less than d. Cant determine

Which of the following is NOT a scientific hypothesis that can be studied? 1. The Earth's wind is caused by the Sun. 2. The Earth orbits around the Sun. 3. Tides are caused by the moon. 4. Chlorophyll makes grass green. 5.

Many meteorites appear to have formed very early in the solar system's history. How do these meteorites support our theory about how the terrestrial planets formed

What is the relationship between the poles of a magnet? which direction does the magnet field move?

Part C At what speed does the wreckage move if one car was driving north and one east? Express your answer to two significant figures and include the appropriate units. ! HA C ? Value Units Submit Request Answer Provide Feedback

Which person below is experiencing a delusion? A. Imani, who reads a lot and thinks she will go to an Ivy League school O B. Nia, who thinks that she is the daughter of the president and an extraterrestrial O C.

Large amounts of water that quickly infiltrate soil on a sloped surface can A. slow down the effects of mass movement by making the soil thicker and more resistant to flow B. hold soil particles together and reduce the stress on the soil C.

Our Sun radiates 4 X 10^26 Joules of energy each second it shines. Calculate how many 50 megaton hydrogen bomb explosions would be needed to produce the same 4 X 10^26 Joules of energy that the Sun radiates in one second.?

What was Operation Overlord? a. the code name for the Allied invasion of Normandy b. the code name for the Axis invasion of France c. the code name for the project to build atomic bomb d.