14. As energy is transferred or conserved, some of that energy becomes unavailable to do work. What happens to this unavailable energy?(1 point) Responses The unavailable energy is conducted The unavailable energy is conducted The unavailable energy is destroyed The unavailable energy is destroyed The unavailable energy is given off as heat The unavailable energy is given off as heat The unavailable energy is given off as microwaves The unavailable energy is given off as microwaves Question 15 15. Betsy uses an electric alarm clock to wake up for school. What energy transformation happens in the alarm clock to help her wake up?(1 point) Responses electrical energy converts to heat energy electrical energy converts to heat energy sound energy converts to kinetic energy sound energy converts to kinetic energy chemical energy converts to electrical energy chemical energy converts to electrical energy electrical energy converts to sound energy electrical energy converts to sound energy Question 16 16. An aluminum block has a starting temperature of 300oC. The block is placed into 200 milliliters of water, which has a temperature of 20oC. What heat transfer will occur?(1 point) Responses Heat will flow from the block to the water until both have a temperature of 300oC. Heat will flow from the block to the water until both have a temperature of 300oC. Heat will flow from the block to the water until both substances have a temperature of 20 degrees Celcius. Heat will flow from the block to the water until both substances have a temperature of 20 degrees Celcius. Heat will flow from the block to the water until both substances have the same temperature as their container. Heat will flow from the block to the water until both substances have the same temperature as their container. Heat will flow from the block to the water until both substances have a temperature between 20 degrees Celsius and 300 degrees Celcius. Heat will flow from the block to the water until both substances have a temperature between 20 degrees Celsius and 300 degrees Celcius. Question 17 17. Two samples of pure water are mixed with food coloring. One sample is red, and the other is blue. When the two water samples are combined, the red water floats on top of the blue water. Which statement best explains this result? (1 point) Responses The blue water is warmer and is more dense. The blue water is warmer and is more dense. The red water is colder and is more dense. The red water is colder and is more dense. The red water is warmer and is less dense. The red water is warmer and is less dense. The blue water is colder and is less dense. The blue water is colder and is less dense. Question 18 18. Which investigation would best show the transfer of heat energy without any type of matter as a medium?(1 point) Responses an investigation of radiation using a current within a fluid an investigation of radiation using a current within a fluid an investigation of radiation using electromagnetic waves an investigation of radiation using electromagnetic waves an investigation of conduction through movement of particles within a solid an investigation of conduction through movement of particles within a solid an investigation of conduction using collisions between particles an investigation of conduction using collisions between particles Question 19 19. Convection ovens cook food more evenly than a standard thermal oven. Which statement explains how a convection oven works?(1 point) Responses Hot air is transferred through direct molecule contact. Hot air is transferred through direct molecule contact. Hot air is transferred through density differences when cool air rises and hot air sinks. Hot air is transferred through density differences when cool air rises and hot air sinks. Hot air is transferred when heat radiates from a thermal burner. Hot air is transferred when heat radiates from a thermal burner. Hot air is transferred through density differences when hot air rises and cool air sinks. Hot air is transferred through density differences when hot air rises and cool air sinks. Question 20 20. People use oven mitts to avoid getting burns when moving hot metal pans while cooking. Which physical property of the metal pan requires the use of an oven mitt when it is hot?(1 point) Responses High thermal conductivity High thermal conductivity Low thermal conductivity Low thermal conductivity High solubility High solubility Low magnetism

Answer 1

Here are the answers to the questions based on the information provided:

Question 14: The unavailable energy is given off as heat.

Question 15: Electrical energy converts to sound energy.

Question 16: Heat will flow from the block to the water until both substances have a temperature between 20 degrees Celsius and 300 degrees Celsius.

Question 17: The red water is warmer and is less dense.

Question 18: An investigation of radiation using electromagnetic waves.

Question 19: Hot air is transferred through density differences when cool air rises and hot air sinks.

Question 20: High thermal conductivity.

Feel free to ask if you need further explanations or assistance!

Answer 2

the solar panels that power all of the appliances in Joshua's house. What energy transformations occur that enable Joshua to bake cookies for his family in the oven? (1 point) Responses light energy → electrical energy → chemical energy light energy → electrical energy → chemical energy heat energy → chemical energy → light energy heat energy → chemical energy → light energy light energy → electrical energy → heat energy light energy → electrical energy → heat energy heat energy → light energy → heat energy

Answer 3

The correct response for the energy transformations that enable Joshua to bake cookies for his family in the oven is:

light energy → electrical energy → heat energy.

This sequence captures how solar panels convert sunlight (light energy) into electrical energy, which is then used to power the oven, creating heat energy necessary for baking.

Answer 4

Often Bobby sees his pinwheel spinning, but other times it does not spin. Which statement best explains what makes his pinwheel spin? (1 point) Responses The Sun heats up the pinwheel, causing it to turn. The Sun heats up the pinwheel, causing it to turn. Energy from the ground shakes the wheel causing the pinwheel to move. Energy from the ground shakes the wheel causing the pinwheel to move. Energy from the wind pushes on the wheel causing the pinwheel to move. Energy from the wind pushes on the wheel causing the pinwheel to move. The colors on the wheel repel one another, causing it to turn. The colors on the wheel repel one another, causing it to turn.

Answer 5

The statement that best explains what makes Bobby's pinwheel spin is:

Energy from the wind pushes on the wheel causing the pinwheel to move.

This is because pinwheels are designed to spin when wind or air moves past them, creating lift and causing the blades to rotate.

Answer 6

9. Rebecca climbs the ladder of a large water slide, waits her turn at the top, and then slides down the slide into a pool. Which answer best describes the energy changes during her time on the slide?(1 point) Responses potential → mechanical → kinetic potential → mechanical → kinetic kinetic → mechanical → potential kinetic → mechanical → potential kinetic → potential → kinetic kinetic → potential → kinetic potential → kinetic → potential potential → kinetic → potential Question 10 10. Kim is upstairs, but walks downstairs to the kitchen for a snack. Which statement correctly describes the types of energy she has at the top of the stairs and as she walks down the stairs?(1 point) Responses kinetic energy at the top of the stairs; potential energy as she walks down kinetic energy at the top of the stairs; potential energy as she walks down potential energy at the top of the stairs; potential energy as she walks down potential energy at the top of the stairs; potential energy as she walks down kinetic energy at the top of the stairs; kinetic energy as she walks down kinetic energy at the top of the stairs; kinetic energy as she walks down potential energy at the top of the stairs; kinetic energy as she walks down

Answer 7

Here are the answers for the questions you provided:

Question 9: The answer that best describes the energy changes during Rebecca's time on the slide is: potential → mechanical → kinetic.

• At the top of the slide, she has potential energy due to her height. As she starts to slide down, that potential energy converts to mechanical energy until she reaches the bottom where it becomes kinetic energy as she moves.

Question 10: The statement that correctly describes the types of energy Kim has at the top of the stairs and as she walks down the stairs is: potential energy at the top of the stairs; kinetic energy as she walks down.

• At the top of the stairs, Kim has potential energy due to her height, and as she walks down, that potential energy converts to kinetic energy as she moves.

Let me know if you need further assistance!

Answer 8

8. The pendulum in the diagram below swings from position A to B. If we don’t consider friction, what happens to the total mechanical energy as the pendulum swings from position A to position B? (1 point) Responses It is not conserved It is not conserved It declines It declines It remains the same It remains the same It becomes greater. It becomes greater.

Answer 9

The correct answer to the question about what happens to the total mechanical energy of the pendulum as it swings from position A to position B, if we don't consider friction, is:

It remains the same.

In the absence of friction and other non-conservative forces, the total mechanical energy (the sum of potential and kinetic energy) of the pendulum is conserved as it swings back and forth.