Rust forms from the reaction of a metal with oxygen; this is an example of a
synthesis reaction.
true
false

Abox that has self-contained cable clamps holds two light switches. a two-wire no. 12 cable with ground feeds the box, and a pair of two-wire no. 12 cables (four conductors) with ground wires leaves the box to feed the light fixtures. the second switch is fed by a no. 12 jumper wire from the first switch. which one of the following box combinations would furnish the minimum allowable volume? a. two 3-inch × 2-inch × 21⁄2-inch gangable device boxes b. two 3-inch × 2-inch × 11⁄2-inch gangable device boxes c. two 3-inch × 2-inch × 23⁄4-inch gangable device boxes d. two 3-inch × 2-inch × 21⁄4-inch gangable device boxes

Electromagnetic force is present when electromagnetic fields a.become charged as they lose electrons. b.become stable as they come in contact with other forces. c. interact with charged particles. d.gain energy from other forces.

Which of the following is used to answer scientific question? a. intuitionb. opinion pollsc. experimentd. imagination