Cosmologists hypothesize and form theories to explain areas of the universe that are currently

Impossible to explore based on the Dark Matter Principle,

False

True

When a nuclear power accident occurs: all of the effects are seen immediately. the effects are powerful yet fleeting. only a small radius surrounding the accident is affected. radiation may stick around for a long time and cause cancer.

Describe J. J Thomson's plum pudding model, and explain how it compares to the modern day atomic theory.

Which of the choices describes an action-reaction force pair for a space station containing astronauts in orbit about the earth? (A) The weight of the astronauts and the centripetal force on the space station.

A 45 kg student runs up a flight of stairs that are 3.2 m high in 2 seconds. How much power did the student use during this time? 706 W 288 W 72 W 7.0 W

CE 36. A 50,000 kg plane is flying at a constant velocity of 130 m/s. What is the net force that is acting on it?

You travel an an average speed of 20 km/h in a straight line to get to your grandmothers house. It takes you 3 hours to get to her house. How far away is her house from where you started?

A boat with an anchor on board floats in a swimming pool that is somewhat wider than the boat. Does the pool water level move up, move down, or remain the same if the anchor is (a) dropped into the water or (b) thrown onto the surrounding ground

In July 2005, NASA's "Deep Impact" mission crashed a 372-kg probe directly onto the surface of the comet Tempel 1, hitting the surface at 37,000 km/h.

What conversion factor is needed to change from kilometres to meters

What does the law of universal gravitation state?