which two of these heats of reaction would be easiest and safest measure in the laboratory in which two are better obtain through reference sources? why?

What is the effect of returning nuclear reactor cooling water back into bodies of water?

What happens after sound waves create vibrations in the ear?

Type the correct answer in each box. use numerals instead of words. the distance between earth and the moon is about 384,400 kilometers. the distance can be written in scientific notation as a × 10b kilometers, where a = and b = .