3. In which process do substances have to be in direct contact when heat moves from areas of more heat to areas of less heat?

conduction

convection

radiation

none of the above

The measurement 6.4x10^3 g also could be writen as

Assume a person has defective carrier molecules for a given substance. explain what effect this would have on a person's cells

I'm an electrically neutral atomic any element, there are equal numbers of

A jar contains a certain substance. Which observation would show that the substance must be either a solid or a liquid?

How are particles in a gas like people outside of a movie theater?

Why does the body of the bird covered with feathers?

One molecule of caffeine contains 8 atoms of carbon, 10 atoms of hydrogen, 2 atoms of oxygen, 4 atoms of nitrogen. write the formula for caffeine with the elements in the order they are given.

A piece of magnesium metal is heated in the presence of chlorine gas, and a reaction takes place. What compound will most likely be produced? A. Mg2C1 B. MgCl3 C. MgCl2 D. MgCI

What is the pressure of the gas in this mercury manometer if h = 81 mm and atmospheric pressure is 749 mmHg

A microscope containing two or more lenses is an