What type of reaction is 2Na+2H2O?2NaOH+H2+heat

Which of the fundamental forces explains the structure of atoms and molecules?

Two blocks connected by a rope of negligible mass are being dragged by a force at a 22° angle above horizontal (see figure below). Suppose F = 89.0 N, m1 = 14.0 kg, m2 = 22.

What is the period for one wing flutter in seconds? Round your answer to two significant figures.

Which would cause more damage - a bus moving at 25 mph or a small car moving at 25 mph?

Why does the percentage of water vapor vary?

If you have a beam perfectly balanced on a fulcrum and put a weight at the very end of one side, is there a way to know where you should put a heavier object on the other end?

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