A student is shaking one end of a small rug with a ball on top of it. The wave that is produced travels through the rug and moves the ball upward, as shown in the diagram below.

 

 

Which type of wave is produced in the rug?

A student has a circuit that is missing a component at location X, as shown in the diagram below.

 

 

The student wants component Y to warm up after the switch is closed. Which of the following components should the student add to the circuit at location X?

An object is traveling in a straight line. The graph below shows the object’s velocity over time.

 

 

Which line segment shows the object traveling with a constant, positive acceleration?

A person is driving north in a car at a constant speed. A police officer is driving south toward him at a constant speed. The police officer uses a radar unit to measure the speed of the person’s car. The radar unit sends out waves of a certain frequency toward the person’s car. The waves reflect off the person’s car and travel back to the radar unit in the police car.

 

What happens to the frequency of the waves detected by the radar unit?

 

A student slowly heats a beaker of a liquid on a hot plate. The liquid has a boiling point of 78°C. The student makes the graph shown below from the data she records as the liquid is heating.

 

 

Which of the following statements best describes what happens to the molecules of liquid between 5 and 10 minutes of heating?

A neutral balloon is rubbed with a piece of wool cloth. As a result, the balloon has a negative static charge. Which of the following statements best

explains why the balloon has a negative charge?

The human ear is most sensitive to sound that has a frequency of about 4000 Hz. Assume that the speed of sound in air is 340 m/s. What is the wavelength of a sound heard in the air with this frequency?

The diagram below represents a block sliding across a table at a constant speed. All forces are shown except the frictional force.

 

 

What is the magnitude of the frictional force on the block?

Which of the following graphs best represents how the force between two identical electric charges varies as the charges move away from each other?

a. Draw a schematic diagram of the student’s original circuit with the 42-ohm resistor. Be sure to label the battery and the resistor.

b. Describe in words the relationship between current and resistance as voltage is held constant.

The student will investigate these relationships further using a different experiment.

 

c. Write a procedure the student could use to test the relationships among voltage, current, and resistance if the only materials available for use are three 3.0 V batteries, one 30-ohm resistor, wire, and an ammeter.

d. Make a data table similar to the Student’s Data table above to show the expected current measurements for your procedure from part (c).

a. At which position does the person have maximum kinetic energy? Explain your answer.

b. Neglecting friction, describe the energy conversion as the person travels from position X to position Y.

c. The person is 1.0 m above the ground at position Y and 1.5 m above the ground at position Z. Neglecting friction, calculate the change in gravitational potential energy as the person swings from position Y to position Z. Show your calculations and include units in your answer.

d. Neglecting friction, calculate the speed of the person at position Y. Show your calculations and include units in your answer.