. Lashonte was studying mechanical energy in science class. She noticed several possible examples of mechanical energy in her environment. Which of the following is NOT an example of mechanical energy?
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a garden hose with moving water
music playing on your phone
a windmill moving in the wind
a lamp giving off light
9 answers
The correct answer is "a lamp giving off light." Light is a form of electromagnetic energy, not mechanical energy.
2. Kyra and Violet are camping with their family. They are roasting marshmallows over a campfire. What types of energy are released by the camp fire?
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mechanical energy and magnetic energy
heat energy and light energy
nuclear energy and electrical energy
chemical energy and sound energy
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mechanical energy and magnetic energy
heat energy and light energy
nuclear energy and electrical energy
chemical energy and sound energy
The correct answer is "heat energy and light energy." When wood burns in a campfire, the chemical energy in the wood is converted into heat and light energy.
When energy is conserved or transferred, some energy becomes unavailable to do useful work. What happened to the unavailable energy?
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It is conducted.
It is completely destroyed.
It is given off as heat.
It is given off as microwaves.
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It is conducted.
It is completely destroyed.
It is given off as heat.
It is given off as microwaves.
The correct answer is "It is given off as heat." When energy is conserved or transferred, some of it is converted into heat energy, which is typically unable to do useful work.
4. An electric fan is plugged into an outlet and the circuit completed, making the fan blades spin. Which of the following correctly describes this situation?
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Electrical energy is transformed into mechanical energy.
Mechanical energy is transformed into electrical energy.
Mechanical energy is destroyed, and electrical energy is created.
Electrical energy is destroyed, and mechanical energy is created.
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Electrical energy is transformed into mechanical energy.
Mechanical energy is transformed into electrical energy.
Mechanical energy is destroyed, and electrical energy is created.
Electrical energy is destroyed, and mechanical energy is created.
The correct answer is "Electrical energy is transformed into mechanical energy." When the electric fan is plugged into an outlet and the circuit is completed, electrical energy is supplied to the fan, which is then converted into mechanical energy to make the fan blades spin.
hat is the main type of energy conversion taking place?
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Captionless Image
Thermal energy is converted to mechanical energy as the energy from heat provides energy for movement.
Mechanical energy is converted to thermal energy as the energy from movement creates heat in the surrounding air.
Chemical energy is converted to mechanical energy as the energy from digested food provides energy for movement.
Mechanical energy is converted to chemical energy as the movement from movement creates reactions in the surrounding air.
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1 point
Captionless Image
Thermal energy is converted to mechanical energy as the energy from heat provides energy for movement.
Mechanical energy is converted to thermal energy as the energy from movement creates heat in the surrounding air.
Chemical energy is converted to mechanical energy as the energy from digested food provides energy for movement.
Mechanical energy is converted to chemical energy as the movement from movement creates reactions in the surrounding air.
The correct answer is "Chemical energy is converted to mechanical energy as the energy from digested food provides energy for movement."