The diagram shows a simple circuit.

 

 

Which of the following could be added at point W to increase the brightness of

the light bulb in the circuit?

A device is used to detect cars that are stopped at a traffic light. The device

emits infrared light and then detects returning infrared light, as shown.

 

Which of the following best describes how this device works?

A free-body force diagram for a 2 kg object is shown.

 

 

What is the magnitude of the object’s acceleration?

An airplane is traveling at a velocity of 80 m/s when it lands on the ground. As soon as the airplane touches the ground, it undergoes a constant acceleration of −5.0 m/s² and its velocity decreases to 10 m/s in 14 s.

 

Which of the following equations can be used to determine the distance the airplane travels as it slows from 80 m/s to 10 m/s?

 

Which of the following best describes the energy involved in process 1?

 

Which of the following best explains why a photon is emitted during process 2?

Two bar magnets, X and Y, are initially placed 0.01 m apart with their north poles facing each other. Magnet Y is then rotated so its south pole faces the north pole of magnet X. The diagrams show the initial setup and the final setup, after magnet Y is rotated?

 

Which of the following best describes how the force exerted on magnet X is affected when magnet Y is rotated?

Two beams of light, X and Y, shine on a metal surface and eject electrons from the surface. Light X ejects electrons that have a greater amount of energy than the electrons light Y ejects.

 

Which of the following best compares light X and light Y?

A positively charged particle and a negatively charged particle that are surrounded by an electric field are shown in the diagram. Three locations in the electric field are labeled X, Y, and Z.

 

Which of the following best describes the strength of the electric field for two locations?

       

 

Part A. A generator converts

Questions 13-16. The following section focuses on an investigation about collisions.

 

Read the information below and use it to answer the selected-response questions and constructed-response question that follow.

 

A group of students conducted an investigation to learn about collisions. The students used an air track and two gliders, X and Y. Friction was negligible on the air track. The investigation had the following steps:

 

 

The diagram shows glider X moving toward glider Y after glider X was pushed by the spring.

 

 

 

The students recorded the data from three trials of the investigation. A negative velocity indicates that the glider moved to the left, and a positive velocity indicates that the glider moved to the right. The data are shown in the table. No velocity data were recorded for glider Y after the collisions.

 

 

 

In trial 1, which of the following best explains what happened to the kinetic energy of glider X after it collided with glider Y?

The students made an incomplete model of the momentum of each glider before and after the collision in trial 2. In the model, the length of each arrow represents the magnitude of the momentum.

 

Which of the following arrows best completes the model?

The graph shows the velocity of glider X as it moved 0.7 m toward glider Y.

 

 Time Velocity Which of the following graphs shows the position of glider X as it moved the 0.7 m toward glider Y?

During trial 1, glider X was moving to the right before the collision with glider Y, and then moved to the left after the collision with glider Y.

 

Part A. Based on the data table, calculate the momentum of glider X before the collision in trial 1. Show your calculations and include units in your answer.

The circuit shown has a total current of 0.3 A.

 

A resistor is added to the circuit so that the total current in the circuit is 0.7 A. Which diagram shows the new circuit with a total current of 0.7 A?

The efficiencies of two devices, device X and device Y, are shown in the table.

 

If 95.0 J of energy is added to each device, what will be the difference in the output energies from the devices?

This question has four parts.

 

Homemade ice cream can be made using a metal container in a bucket. The metal container is filled with the ice cream ingredients (cream, sugar, and flavoring). The bucket is filled with salty water and ice cubes. The ice cream ingredients are stirred using a handle. The diagram shows the ice cream maker.

 

 

Part A. The parts of the ice cream maker system have different initial temperatures.

 

• The metal container and the ingredients both have an initial temperature of 10°C.

• The salty water with ice cubes has an initial temperature of –15°C.

 

The temperature of the air surrounding the bucket is 20°C.

 

Draw an arrow pointing left or right in each box to show how heat flows through the system.

 

Part B. The ingredients for vanilla ice cream have a specific heat of 3.22 J/g • °C and a freezing point of –5.6°C.

 

Calculate the amount of thermal energy transfer required to reduce the temperature of 1500 g of vanilla ice cream ingredients from 10°C to –5.6°C. Show your calculations and include units in your answer.

Part C. The ingredients for chocolate ice cream have a specific heat of 3.11 J/g • °C and a freezing point of –5.6°C.

 

Identify whether reducing the temperature of 1500 g of chocolate ice cream ingredients from 10°C to –5.6°C will require more, less, or the same amount of thermal energy transfer as is required to reduce 1500 g of vanilla ice cream ingredients from 10°C to –5.6°C. Explain your reasoning.

Part D. As the ice cream is being made, the temperature of the salty water with ice cubes is constant.

 

Explain how there can be thermal energy transfer between the metal container and the salty water without the temperature of the salty water changing.

The question has four parts. Be sure to label each part of your response.

 

Pipe organs are musical instruments that produce sound waves using pipes. Each pipe is designed to produce a sound wave with a specific frequency when a key is pressed. A pipe organ is shown.

 

Part A. A sound wave reaches the end of an organ pipe, is reflected, and then constructively interferes with another sound wave.

 

Which of the following best describes what happens in the resulting wave when the sound waves constructively interfere?