At the particle level, the weakest of the fundamental forces is:

gravity

electromagnetic forces

strong force

weak force

Why do optical astronomers often put their telescopes at the tops of mountains, whereas radio astronomers sometimes put their telescopes in deep valleys?

Define acid and base in terms of pH in a paragraph

What is the potential energy of a 900 kg rock positioned on a cliff 30 m above the ground?

Write 5 sentences about what you already know about kinetic energy.

A straight road to the top of a hill is 2500 feet long and make of 12°with the horizontal. find the high of the hill

A situation that restricts something

Why is the sky blue all the time

Where did the rotational kinetic energy of the earth come from?

What is the mass in kg of a leopard in a tree if the tree branch is 36 m up and the leopard's gravitational potential energy is 29988 J?

Venus's average distance from the sun is 0.72 AU and Saturn's is 9.54 AU. Calculate the orbital velocity of Venus and Saturn around the sun. (The mass of the sun is 1.99 X 10^30 KG. an AU is 1.50 X 10^11 M.