All compounds are made of

A.) atoms of two or more elements

B.) two or more atoms of the same element

C.) atoms arranged in a crystal

D.) atoms joined by covalent bonds

I think its D.) but im not sure.!

Which is true of a radioisotope that is used to date rock formations? It has a long half-life. It is a plentiful isotope. It has a short half-life. It is a rare isotope.

Is Mars luminous?

You are in a room in a basement with a smooth concrete floor (friction force equals 40 N) and a nice rug (friction force equals 55 N) that is 3 m by 4 m.

What process is used when the sun transfers light to plants A. conduction B. radiation C. convection D. all of these

Porque flotamos en el espacio?

A ball hits a wall. What is true about the magnitude of the force experienced by the ball compared with the force experienced by the wall? OA. The ball experiences more force than the wall. OB. The ball experiences less force than the wall.

A swimmer jumps from a waterfall thats is 8.5 m high from the lake below. How fast must he run horizontally to dive 2.5m away from the base of the waterfall?

What happens (as far as energy goes) when a molecule of gas strikes the wall of a container?

The boom of a fire truck raises a fireman (and his equipment - total weight 280 lbf) 60 ft into the air to fight a building fire.

Two masses are separated by 1 m. suppose the masses are moved so they are 2 m apart how will the gravitational force change