Quiz EOY Review 2nd Semester

The picture shows two forces incident on a toy car. Which of the following best describes the resulting motion of the toy car?

• It travels to the right at an increasing speed.

• It travels to the left at an increasing speed.

• It travels to the right at a constant speed.

• It travels to the left at a constant speed.

The graph represents the motion of a car. Based on the graph, the car is most likely—

• driving up a steep hill

• speeding up

• driving at constant speed

• slowing down

Which calculation is used to determine acceleration?

• divide change in velocity by change in time

• multiply average velocity by change in time

• divide average velocity by mass

• multiply change in velocity by distance traveled

The majority of the electrical power plants in the U.S. are powered by fossil fuels. A smaller number of power plants are generating electricity from nuclear energy. Using nuclear energy has a major advantage over the use of fossil fuels in that —

• the carbon dioxide emitted is reduced

• lower cost for construction is necessary

• no hazardous waste products are produced

• it is easier to find a construction site

What is the relationship between mass and the force of gravity?

• Lower gravitational pull creates more mass.

• Higher gravitational pull creates more mass.

• Lower mass creates higher gravitational pull.

• Higher mass creates higher gravitational pull.

A spaceship takes off and travels away from the surface of Earth. Which of these describes how the gravitational force changes between the spaceship and Earth as it travels further away from Earth?

• The gravitational force is directly proportional to the distance between the spaceship and the center of Earth.

• The gravitational force is directly proportional to the square of the distance between the spaceship and the center of Earth.

• The gravitational force is indirectly proportional to the distance between the spaceship and the center of Earth.

• The gravitational force is indirectly proportional to the square of the distance between the spaceship and the center of Earth.

Two boxes filled with books have the same mass and are placed 4 meters apart. If the books are removed from each box to reduce the mass to one-half the original mass, how far apart must the boxes be placed to keep the gravitational force between the two boxes constant?

• 1 meter

• 2 meters

• 8 meters

• 16 meters

A telescope is a tool that helps people observe distant objects. In the simplest telescope design, incoming light hits a lens and is focused to a single point. This focused image is then magnified by a second lens so that it is roughly the same size as an observer's pupil. Which of the following wave behaviors plays the most important role in the functioning of this type of telescope?

• Reflection

• Interference

• Refraction

• Resonance

After working on a project in a science lab, a student drew this illustration of a device in his lab notebook. The coil in the diagram was a coil of copper wire, and it was connected to the battery using metal paper clips and copper wire. When the circuit was connected, the coil began to spin on the axis formed by the wires. Which device is depicted in the student's illustration?

• Capacitor

• Generator

• Motor

• Transformer

Two electrically opposite charges are separated by a fixed distance. Which action will provide the greatest increase in the force of attraction between the charges?

• Double each charge and double the distance between the charges.

• Double each charge and halve the distance between the charges.

• Halve each charge and double the distance between the charges.

• Halve each charge and halve the distance between the charges.