Why do opposite charges attract and like charges repel?

A coffee-maker contains a heating element that has a resistance of 28 Ï. this heating element is energized by a 120-v outlet. what is the current in the heating element?

What would happen to the gravitational force upon the earth if the sun were replaced by a 1 solar mass black hole?

if a distant star is 20 light years away how long wil it take us to travel there moving at the speed of light?

The combined weight of the vessel and its engine should not exceed what percentage of the trailer's recommended load capacity?

What is the name of the body cavity of a sponge

How does the planet Venus look to a person standing on the Earth? A. Venus looks like a small moon. B. Venus is bright like the Sun. C. Venus looks like a star. D. Venus cannot be seen from Earth.

Which statement is a description of Charles's law? The temperature and volume of a gas are directly proportional when pressure is constant. The temperature and volume of a gas are inversely proportional when pressure is constant.

Which boundary is likely to form mountains why?

What is the conversion of celcius to kelvin?

Why does the percentage of water vapor vary?