PS Exam #3

Three fundamental states of matter are represented in the diagrams. What is the order of the diagrams if arranged from low kinetic energy to high kinetic energy?

• I, II, III
• II, III, I
• II, I, III
• III, II, I

Which statement best compares a single burning match to an entire box of matches burning together?

• The single match will produce the same temperature and the same amount of heat as the box of matches will produce.
• The single match will produce the same temperature and a lot less heat than the box of matches will produce.
• The single match will produce a much lower temperature and the same amount of heat as the box of matches will produce.
• The single match will produce a much lower temperature and a lot less heat than the box of matches will produce.

A wedge and a screw are variations of what type of simple machine?

• pulley
• lever
• wheel and axle
• inclined plane

Emily is riding her bicycle. Which best explains why only some of the energy used to pedal her bicycle is transferred into forward motion of the bicycle?

• The energy of the bicycle tire is applied in a circular motion.
• The energy of the bicycle is transferred to only one wheel.
• The gears and chain of the bicycle are covered with oil.
• The gears and chain of the bicycle generate friction.

When a rock is dropped from a height of one meter, the gravitational potential energy of the rock is converted to kinetic energy. When the rock hits the floor and does not bounce, what happens to the kinetic energy of the rock?

• The energy is converted to heat and sound.
• The energy is destroyed and cannot change form.
• The energy is converted to chemical energy.
• The energy is returned to gravitational energy.

A bicyclist at the top of a hill begins to coast without pedaling. The bicycle speeds up as it descends to the bottom of the hill and then slows down as it continues up a second hill, where it stops. Which of these sequences best describes the energy change of the bicycle from the top of the hill until it stops?

• potential — kinetic — kinetic
• kinetic — potential — potential
• kinetic — potential — kinetic
• potential — kinetic — potential

Light rays are focused by the lens of a camera through the process of

• reflection.
• refraction.
• dispersion.
• diffraction.

When a light bulb is used to light a room, which of the following is transferred by the light waves from the bulb to the surfaces of the room?

• mass
• charges
• energy
• electrons

Two waves have the following waveforms. Which conclusion can best be supported by the illustrations?

• Wave A has higher frequency.
• Wave A is an ultraviolet wave.
• Wave B has greater energy.
• Wave B is a visible light wave.

As Wave 1 moves to the right, what will the boat do?

• move up and to the left
• move up and then down
• move to the top of the wave and stay there
• move to the right and stay in front of the wave