The correct response is: Electrical to mechanical.
When an electric fan is plugged into a wall outlet, electrical energy from the outlet is converted into mechanical energy, which causes the fan blades to spin.
When an electric fan is plugged into a wall outlet, the fan blades spin as a result. What energy transformation occurred?(1 point)
Responses
Electrical energy is created, but mechanical energy is destroyed.
Electrical energy is created, but mechanical energy is destroyed.
Mechanical energy is created, but electrical energy is destroyed.
Mechanical energy is created, but electrical energy is destroyed.
Mechanical to electrical
Mechanical to electrical
Electrical to mechanical
9 answers
A simple circuit is wired with a battery, a switch, and a bell.
When the switch is turned on, what energy transformations will occur?
(1 point)
Responses
The battery’s chemical energy transforms to sound energy, which the wire transfers to the bell.
The battery’s chemical energy transforms to sound energy, which the wire transfers to the bell.
The switch’s electrical energy transforms to sound energy, which the wire transfers to the bell.
The switch’s electrical energy transforms to sound energy, which the wire transfers to the bell.
The battery’s chemical energy transforms to electrical energy, which the bell then transforms to sound energy.
The battery’s chemical energy transforms to electrical energy, which the bell then transforms to sound energy.
The switch transforms electrical energy to chemical energy, which the bell then transforms to sound energy.
The switch transforms electrical energy to chemical energy, which the bell then transforms to sound energy.
When the switch is turned on, what energy transformations will occur?
(1 point)
Responses
The battery’s chemical energy transforms to sound energy, which the wire transfers to the bell.
The battery’s chemical energy transforms to sound energy, which the wire transfers to the bell.
The switch’s electrical energy transforms to sound energy, which the wire transfers to the bell.
The switch’s electrical energy transforms to sound energy, which the wire transfers to the bell.
The battery’s chemical energy transforms to electrical energy, which the bell then transforms to sound energy.
The battery’s chemical energy transforms to electrical energy, which the bell then transforms to sound energy.
The switch transforms electrical energy to chemical energy, which the bell then transforms to sound energy.
The switch transforms electrical energy to chemical energy, which the bell then transforms to sound energy.
The correct response is: The battery’s chemical energy transforms to electrical energy, which the bell then transforms to sound energy.
In this scenario, the battery converts its stored chemical energy into electrical energy when the switch is turned on. This electrical energy then powers the bell, which transforms it into sound energy.
A woman runs as shown.
What main energy conversion occurs?
(1 point)
Responses
Thermal energy changes into mechanical energy because heat provides energy for motion.
Thermal energy changes into mechanical energy because heat provides energy for motion.
Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.
Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.
Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.
Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.
Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
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What main energy conversion occurs?
(1 point)
Responses
Thermal energy changes into mechanical energy because heat provides energy for motion.
Thermal energy changes into mechanical energy because heat provides energy for motion.
Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.
Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.
Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.
Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.
Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
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The correct response is: Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
In this case, the energy stored in the woman's body, derived from the food she has digested (chemical energy), is converted into mechanical energy as she runs.
Heated gases will rise to the top of its container. Why does this occur?(1 point)
Responses
Heated gases will increase in kinetic energy and increase in density.
Heated gases will increase in kinetic energy and increase in density.
Heated gases will decrease in kinetic energy and decrease in density.
Heated gases will decrease in kinetic energy and decrease in density.
Heated gases will decrease in kinetic energy and increase in density.
Heated gases will decrease in kinetic energy and increase in density.
Heated gases will increase in kinetic energy and decrease in density.
Responses
Heated gases will increase in kinetic energy and increase in density.
Heated gases will increase in kinetic energy and increase in density.
Heated gases will decrease in kinetic energy and decrease in density.
Heated gases will decrease in kinetic energy and decrease in density.
Heated gases will decrease in kinetic energy and increase in density.
Heated gases will decrease in kinetic energy and increase in density.
Heated gases will increase in kinetic energy and decrease in density.
The correct response is: Heated gases will increase in kinetic energy and decrease in density.
As gases are heated, their molecules gain kinetic energy, causing them to move faster and spread apart. This increase in movement decreases the density of the gas, making it lighter than the cooler, denser air surrounding it, which causes the heated gases to rise.
An ice cube is placed on a metal block that is at a room temperature of 30oC. Which statement describes the transfer of heat between the ice cube and metal block?(1 point)
Responses
Heat is transferred from the air to the ice cube, and the ice melts.
Heat is transferred from the air to the ice cube, and the ice melts.
Heat is transferred from the ice cube to the metal block, and the ice melts.
Heat is transferred from the ice cube to the metal block, and the ice melts.
Heat is transferred from the ice cube to the air, and the ice melts.
Heat is transferred from the ice cube to the air, and the ice melts.
Heat is transferred from the air and metal to the ice cube, and the ice melts.
Responses
Heat is transferred from the air to the ice cube, and the ice melts.
Heat is transferred from the air to the ice cube, and the ice melts.
Heat is transferred from the ice cube to the metal block, and the ice melts.
Heat is transferred from the ice cube to the metal block, and the ice melts.
Heat is transferred from the ice cube to the air, and the ice melts.
Heat is transferred from the ice cube to the air, and the ice melts.
Heat is transferred from the air and metal to the ice cube, and the ice melts.
The correct response is: Heat is transferred from the metal block to the ice cube, and the ice melts.
In this scenario, heat will flow from the warmer metal block (at 30°C) to the colder ice cube (at 0°C or lower), causing the ice to absorb heat and subsequently melt.
1 answer