Select the correct answer. A student has a piece of aluminum metal. Which is the most reasonable assumption the student could make about the metal?

A.
It would only conduct electricity if it were melted.
B.
It could melt and boil if thrown into a campfire.
C.
It would break if it were hit with a hammer.
D.
It will always have the exact same shape.
E.
It could be stretched into a thin wire.

Find the mass in grams of 1.37x1020 particles of h3po4

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.