Why does a person's heart rate increase during exercise?

(1) Less oxygen is needed.

(2) More oxygen is needed.

(3) Less carbon dioxide is needed.

(4) More carbon dioxide is needed

Where does the most geologic activity (including volcanos and earthquakes) occur

A 60.0 N performer performs a high wire act of 5.0 m above ground. About how much gravitational potential energy does the performer have?

What is the mass of air occupying the same volume? The density of air at room temperature is 1.20 g/L.?

What is the maximum number of p orbitals in any single energy level in an atom?

Match the following definition to the type of solution it describes. unsaturated solution saturated solution supersaturated solution A. The amount of solute dissolved is less that the maximum amount the solution can hold. B.

How many cups are in a 5-lb. bag of flour?

How is oxygen separated from other substances nearby?

What is the definition of solution in chemistry

One important difference between covalent and ionic bonds is that a. in covalent bonds two atoms share electrons, whereas in ionic bonds one atom gives one or more electrons to the other atom. b.

When u mix oxygen and nitrogen together what do u end up with?