What are 2 key differences between electric force and gravitational force?

Who was the first person to observe a sign of molecular motion?

The resistivity of iron is 1 x 10 - 7 Ωm. The resistance of a iron wire of particular length and thickness is 1 ohm. If the length and the diameter of wire both are doubled, then the resistivity in Ωm will be

A student and a physics teacher hold opposite ends of a horizontal spring stretched from west to east along a tabletop. Identify the directions in which the student should vibrate the end of the spring to produce transverse periodic waves.

Fusion would be a better energy source than fission because it: yields less radioactivity is explosive conserves waterways prevents smog

Given three objects with same size and shape, but different masses, when dropped, would the heaviest fall the fastest? If so, would this mean that the acceleration due to gravity depends on mass? or could there be another factor involved? B.

If the volume of a container increases, then the pressure will: A. first increase and then decrease. B. increase. C. stay the same. D. decrease.

How does the theory of natural selection explain the diversity of life?

What law states that when matter undergoes a physical or chemical change, no atoms are created or destroyed?

Which statement would be a valid argument in favor of using nuclear power? There are few negative impacts from mining the fuel. Reactors are safe from natural disasters. There are little to no waste products from fission.

How would you convince somebody that the momentum of an isolated system is constant?