List two useful properties of current electricity and explain why.

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A ball of mass 2.0 kg falls vertically and hits the ground with speed 7.0 ms-1 as shown below. The ball leaves the ground with a vertical speed 3.0 m/s. The magnitude of the change in momentum of the ball is A. zero. B. 8.0 Ns. C. 10 Ns. D. 20 Ns.

Which describes the motion of the media for a surface wave? A. The motion is parallel to wave direction B. The motion is both parallel and perpendicular to wave direction. C. The motion is perpendicular to wave direction.

A solid rubber stopper has a mass of 33.0 grams and a volume of 30.0 cm3. What is the density of rubber?

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Most of the Earth's volcanoes occuWhen fossils or minerals form, certain unstable elements are sometimes locked into them.

a man is standing on the edge of a 20.0m high cliff. he throws a rock vertically with an initial velocity of 10.0m/s. how high does the rock go?

The slope of a velocity time graph over any interval of time gives the during that interval

if light travels in a vacuum at 3.00 x 10^8m/s and its frequency is 7.44 x 10^7 what is its wavelength

the half-life of carbon - 14 is 5730 years. What fraction of carbon-14 would remain after 11,460 years?