15 multiple choice questions
1. protons are concentrated in a small area at the center of an atom: he discovered the nucleus.
a. atomic mass number
b. rutherford's model
c. subatomic particles
d. bohr's model
2. an uncharged particle in the nucleus mass: 2,000
a neutron
b. nucleus
c. proton

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

Which sound characteristic is not affected by the relative motion of an object