In order for a combustion reaction to occur, like the burning of fossil fuels, what element is required?

Sulfur

Hydrogen

Oxygen

Helium

You need to make mashed potatoes, so you buy a 19 pound bag of Russet potatoes from the grocery store. To the nearest tenth of a kilogram, how many kilograms of potatoes are in the bag? Take a kilogram to be equivalent to 2.21 pounds.

Which of the following is an accurate statement? A. AC Generators produce current that is pulsating, but always remains positive. B.

What is an organ that has villi to absorb the nutrients

What two aspects of a force do scientists measure? A. Position and Size B. Size and Stability C. Magnitude and Direction D. Strength and Magnitude

Tiffany leaves several balloons filled with helium gas inside her car on a sunny day. When she returns to her car, some of the balloons are much larger and a few have popped. Explain what happened.

under what conditions could the angular momentum of the closed system of isolared student, stool, and masses change

Which of the following statements about psychodynamic perspective is not true?

Explain how to run off water could pollute streams and rivers

Explain teen pregnancy from a sociological perspective.

Imagine you are on a roller coaster, riding a skateboard, or running across the ball field. What are some clues that you are moving?