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 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 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 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.
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Heat will flow from the block to the water until both substances have the same temperature as their container.
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 solubility
High solubility
Low thermal conductivity
Low thermal conductivity
High thermal conductivity
High thermal conductivity
Low magnetism
High thermal conductivity
You sure
Yes, I am sure. When a metal pan is hot, it conducts heat very well. This means that the heat from the pan can quickly transfer to your skin, potentially causing burns. Therefore, an oven mitt is used to protect your hands from the high thermal conductivity of the hot metal pan.
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 when heat radiates from a thermal burner.
Hot air is transferred when heat radiates from a thermal burner.
Hot air is transferred through direct molecule contact.
Hot air is transferred through direct molecule contact.
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.
Hot air is transferred through density differences when cool air rises and hot air sinks.
Hot air is transferred through density differences when hot air rises and cool air sinks.
2. The picture shows a baseball moving through the air after it is thrown.
Which graph shows how the kinetic energy (KE) and potential energy (PE) of the baseball changes as it moves?
(1 point)
Responses
Since the graphs are not provided, I am unable to determine which graph shows how the kinetic energy (KE) and potential energy (PE) of the baseball changes as it moves.
7. In an investigation of energy transfer, a student observes a roller coaster at locations A, B, C, and D. Then she creates the graph below of the roller coaster’s potential and kinetic energy at each location.
Which statement is true according to the graph?
(1 point)
Responses
The roller coaster creates kinetic energy.
The roller coaster creates kinetic energy.
The roller coaster destroys potential energy.
The roller coaster destroys potential energy.
The roller coaster’s kinetic and potential energy change from location to the next, but its total energy remains the same.
The roller coaster’s kinetic and potential energy change from location to the next, but its total energy remains the same.
Potential energy increases, but kinetic energy does not change.