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 to electrical
Mechanical to electrical
Mechanical energy is created, but electrical energy is destroyed.
Mechanical energy is created, but electrical energy is destroyed.
Electrical to mechanical
Electrical to mechanical
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 battery’s chemical energy transforms to electrical energy, which the bell then transforms to 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.
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.
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.
r u sure
I apologize for the confusion. You are correct, the main energy conversion in this scenario is indeed chemical energy changing into mechanical energy because energy from digestion of food provides energy for the runner's motion.
Heated gases will rise to the top of its container. Why does this occur?(1 point)
Responses
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 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 increase in kinetic energy and decrease in density.
Heated gases will increase in kinetic energy and decrease in density.
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 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 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 air and metal to the ice cube, and the ice melts.
Heat is transferred from the air and metal to the ice cube, and the ice melts.
Heat is transferred from the air to the ice cube, and the ice melts.