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

What best defines anthropology? A. study of past cultures B. science of people C. study of differences between people

Which orbital would the electron of a ground state hydrogen atom occupy? 1s 1p 2p none of the above 0s?

Do you know how to do this? if you have 4 grams of carbon-14, how much carbon 14 remains after 11,460 years? the half life is 5,730 years.

Why is the process of chemiosmosis also called the light dependent reactions

What are the similarities between low mass stars and high mass stars

The data below were collected for the following reaction at 500 ∘C: CH3CN (g) →CH3NC (g) Time (h) [CH3CN] (M) 0.0 1.000 5.0 0.794 10.0 0.631 15.0 0.501 20.0 0.398 25.0 0.

How do i convert 3.00 moles H2 to molecules?

How can you use the chemical formulas for sucrose (C6H, 20,) and rust (Fe, O,) to classity them ionic or molecular compounds?

What is true of energy as is passes through an ecosystem? a. All of the energy in an organism is used by the animal that eats it. b. Any stored energy in an organism is used by the animal that eats it. c.

Which can associate a suspect and the firing of a gun? (its not b) A) markings on the gun's exterior B) markings on the casing C) markings on the bullet D) powder residues