Consider this statement: Air is matter. Which facts best support the statement?

An electric current that changes directions at regular intervals is called a. directional current. c. reversible current. b. alternating current. d. fluctuating current.

How much heat is absorbed by a 71g iron skillet when its temperature rises from 11oC to 29oC?

If 57,909,000 is distance from sun (in km) what is the distance in scientific notation

A metal ball is just able to pass through a metal ring. When Anette increases the temperature of the ball, however, it will not pass through the ring.

Which response accurately describes a balanced force? Question 7 options: a. A 25-N force acts on the left side of the marble at the same time as a 25-N force acts on the right side of the marble. b.

What is the correct formula for Na + and (SO4) 2 - ? A. Na2SO4 B. Na2 (SO4) 2 C. NaSO4 D. NaSO6

which of the following objects is considered negatively charged A - one with excess electrons on the surface B - one with excess neutrons on the inside C - one with excess protons on the inside D - one with excess protons on the surface

In general, how do the densities of a material in solid and liquid form compare?

Alana summarized what happens when a ball sitting on top of a grassy hill rolls down the hill. The motionless ball has potential energy. Once the ball starts to roll down the hill, new kinetic energy is made.

What unit is commonly used when measuring the energy rating of an electrical appliance