Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals that scientists describe as which of the following?

A.

revolutionary

B.

rotational

C.

periodical

D.

elliptical

The truck is going to be packed with washing machines. These measure 5 ft. by 5 ft. by 6 ft. How many washing machines can fit into the truck?

Which of the following gases moves the fastest? A. Neon B. Argon C. Oxygen D. Helium

When a substance goes directly from solid state to a gaseous state as dry ice does?

Differentiate between compound and mixture.

What is the [H3O+] of a solution with a pH of 8.43?

NaOH+HCl--> NaCl+H2O what is the total number of grams of H2O produced when 116 grams of the product, NaCl, is formed?

Is a sample of liquid nitrogen more dense than a sample of nitrogen gas

You have a balloon containing 1 L of air at STP in a vacuum chamber. What will the volume of the balloon be when you reduce the pressure by half and increase the temperature to 373 K?

Which method will correctly determine whether the forces on an object are balanced or unbalanced? A. Multiply the forces in the horizontal direction by the forces in the vertical direction. B.

Carbon is found in all known forms of life. Which statement best describes why carbon is uniquely suited to forming macromolecules such as those found in living organisms? A. Carbon forms large compounds that are not chemically reactive. B.