IPC Year End

A positively charged object is placed a short distance from a negatively charged object. What would happen to the objects if the distance between them doubled? The objects would —

• Attract each other with less force

• Repel each other with greater force

• Attract each other with the same force

• Have no effect on each other

Two students on skateboards push on each other and find that they move in opposite directions.

If Student A has a mass twice that of Student B, which of the following best describes the resulting acceleration?

• Student A will have a larger acceleration than Student B

• Both students will have the same acceleration

• Student B will have a larger acceleration than Student A

• Student A will not accelerate at all

A bus travels 50.0 km/hr for 3.80 hours. The distance traveled will be -

• 150 km

• 180 km

• 190 km

• 200 km

What is one way to witness a chemical property?

• Observe how the substance reacts with another substance

• Measure the temperature of the substance

• Determine the color of the substance

• Weigh the substance before and after a reaction

A student wants to place a ball on an inclined plane where it will have the greatest potential energy. Where on the inclined plane will the student place the ball?

• A (the top)

• B (the middle)

• C (the bottom)

• D (the side)

Which of the following energy conversion patterns might occur to provide you with electricity?

• The chemical energy in batteries is converted to electrical energy.

• The thermal energy from burning coal is converted to mechanical energy.

• The mechanical energy of the wind turns wind turbines that convert the mechanical energy to electrical energy.

• The gravitational potential energy of water is converted to thermal energy.

A teacher asks students to decrease their kinetic energy. What could the students do in order to decrease their kinetic energy the most?

• Sit down and stop moving

• Run in place

• Jump up and down

• Wave their arms around

A car is an example of which energy conversion?

• Chemical energy to mechanical energy

• Electrical energy to thermal energy

• Mechanical energy to kinetic energy

• Solar energy to chemical energy

The following is not an effect of acid rain?

• It encourages the growth of plant life.

• It damages buildings and monuments.

• It harms aquatic life in rivers and lakes.

• It reduces soil fertility.

Which of the following systems has kinetic energy?

• I. water flowing down a river

• II. a bowling ball rolling down an alley

• III. atoms inside a rock which is sitting on a cliff

• All 3