Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.
From: www.middleschoolchemistry.com
7.5 is the answer. You have to move the decimal 2 places to the right.
Answer:
It is a satellite that collects data about rain and snow.
• Its orbit covers 90 percent of Earth's surface.
• The sensors measure microwaves.
Explanation:
Correct on edge
Answer:
a. because it is an element
Explanation:
its pure because it only has one type of atom, making it an element
Answer: calories?
Explanation: but isn’t it 1 calorie = 4.184 joules of energy
