A double-paned window has two glass panes separated by a layer of air. Why

is air, rather than glass, used to fill this space?

What is the number of complete wave cycles per unit time

Nydia noted all the information below. Which statement gives quantitative data? Some of the growth rings are wider than others. The tree was 20 years old when it was cut down. A forest fire burned the tree during the years that it was alive.

An idea based on observations with no experimental evidence is a:a. Hypothesisc. Theoryb. Modeld. Law

How do the circulatory system and the respiratory system work together?

Michael has a substance that he puts into Container 1. The substance has a volume of 5 cubic meters. He then puts the substance in Container 2, and it now has a volume of 10 cubic meters. In which phase (s) is the substance

A wave with a frequency of 30 Hz has a wavelength of 40.5 m. How fast is the wave traveling?

A soccer ball is sitting in the middle of a soccer field during a game. When the referee blows his whistle, one of the players runs toward the ball and kicks it as hard as he can.

A body with v=20m/s changes its speed to 28m/s in 2sec. its acceleration will be

Charge: A piece of plastic has a net charge of + 2.00 μC. How many more protons than electrons does this piece of plastic have? (e = 1.60 * 10-19 C)

How much heat is needed to raise the temperature of 6g of water by 18oC?