Muscles in animals are often found in pairs, because

A. muscles can only produce a force as they relax.

B. muscles can only pull.

C. muscles need to be able to both push and pull.

D. muscles can only push.

a 2000-kilogram car uses a breaking force of 12000 newton's to stop in 5 seconds. what impulse acts on the car?

An atom of sodium has a larger mass than an atom of neon. How is this possible when neon has so many more valence electrons? What particles make up most of the mass of an atom? What takes up most of the volume of an atom?

Which type of heat source is the cleanest? A. open fireplace B. wood stove C. hot water radiant heat

The transfer of excess charge through a conductor to earth is called?

The momentum of a 0.1 kg object traveling at 2000 m/s is 20,000 kg·m/s. True or False

A baseball flying through the air has kinetic energy because of its motion. true or false?

How many poles does Jupiter's magnetosphere have? a. 2 c. 8 b. 4 d. 9

Which describes nuclear fusion? The nuclei of two atoms combine to form a larger nucleus. The nucleus of one atom splits to form two smaller nuclei. The electrons of two atoms combine to form a cluster of electrons.

In a class debate, a student argues that the big bang theory is "just a theory." What is most likely to be this student's understanding of scientific theories? A. Theories agree with observations of nature. B. Theories are just guesses. C.

Look at the advertisement. A poster that reads, "There's more to resistors than resistance. If you're really serious about cost, be serious about quality." with tools. Which persuasive media technique is used in this advertisement