- What determines an object's kinetic energy?
- Mass and speed
- Potential Energy is the energy of:
- position
1. What determines an object's kinetic energy?
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1 point
Mass and speed
Weight and speed
Mass and position
Weight and position
2. Potential Energy is the energy of:
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1 point
motion
mass
speed
position
11 answers
3. The kinetic and potential energies of an object both always depend on which property?
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1 point
mass of the object
volume of the object
relative position of the object
gravitational force of the object
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1 point
mass of the object
volume of the object
relative position of the object
gravitational force of the object
The kinetic and potential energies of an object both always depend on which property?
- mass of the object
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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1 point
a garden hose with moving water
music playing on your phone
a windmill moving in the wind
a lamp giving off light
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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1 point
mechanical energy and magnetic energy
heat energy and light energy
nuclear energy and electrical energy
chemical energy and sound energy
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1 point
a garden hose with moving water
music playing on your phone
a windmill moving in the wind
a lamp giving off light
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?
*
1 point
mechanical energy and magnetic energy
heat energy and light energy
nuclear energy and electrical energy
chemical energy and sound energy
- Which of the following is NOT an example of mechanical energy?
- a lamp giving off light
- What types of energy are released by the camp fire?
- heat energy 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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1 point
It is conducted.
It is completely destroyed.
It is given off as heat.
It is given off as microwaves.
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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1 point
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.
5. What is the main type of energy conversion taking place?
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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.
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*
1 point
It is conducted.
It is completely destroyed.
It is given off as heat.
It is given off as microwaves.
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?
*
1 point
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.
5. What is the main type of energy conversion taking place?
*
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.
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- When energy is conserved or transferred, some energy becomes unavailable to do useful work. What happened to the unavailable energy?
- It is given off as heat.
- 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?
- Electrical energy is transformed into mechanical energy.
- What is the main type of energy conversion taking place?
- Mechanical energy is converted to thermal energy as the energy from movement creates heat in the surrounding air.
Conduction happens when:
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1 point
molecules vibrate quickly bump into other molecules, which transfers heat
heat is transferred by physical touch
free electrons collide with atoms which cause faster vibrations
all of the above
2. It is important to use plastic or wood handles when cooking because they are good:
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1 point
insulators
conductors
radiators
metalloids
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*
1 point
molecules vibrate quickly bump into other molecules, which transfers heat
heat is transferred by physical touch
free electrons collide with atoms which cause faster vibrations
all of the above
2. It is important to use plastic or wood handles when cooking because they are good:
*
1 point
insulators
conductors
radiators
metalloids
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- Conduction happens when:
- all of the above
- It is important to use plastic or wood handles when cooking because they are good:
- insulators
Hot air _____________ and cold air _____________ due to ___________.
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1 point
falls; rises; gravity
rises; falls; gravity
rises; falls; bouyancy
falls; rises; bouyancy
4. Convection does NOT occur in
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1 point
gases
liquids
solids
fluids
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*
1 point
falls; rises; gravity
rises; falls; gravity
rises; falls; bouyancy
falls; rises; bouyancy
4. Convection does NOT occur in
*
1 point
gases
liquids
solids
fluids
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- Hot air _____________ and cold air _____________ due to ___________.
- rises; falls; gravity
- Convection does NOT occur in:
- solids