Which of the following are vectors?
check all that apply.
a. distance
b. force
c. acceleration
d. energy
e. time
f. speed
g. momentum
h. velocity

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

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.

2. which of the following does not affect the electrical resistance of a body? a. material composing the body b. bodies directly surrounding the body c. length of the body > d. temperature of the body