Chemical, potential energy is stored in a battery.
the negative end of a battery is connected to a wire.
the wire loops numerous times around a piece of steel.
the wire returns to the positive end of the battery.

what happens to the piece of steel?
a) it begins to spin.
b) it gains a negative charge.
c) it gains a positive charge.
d) it moves toward a piece of iron.

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.

Which symbol in the first law of thermodynamics represents the sum of the chemical and thermal energy stored in atoms and molecules? a. q b.w c.v d.u