6.4.2 Energy Transfer worksheet - Free Printable
Educational worksheet: 6.4.2 Energy Transfer worksheet. Download and print for classroom or home learning activities.
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Step-by-step solution for: 6.4.2 Energy Transfer worksheet
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Show Answer Key & Explanations
Step-by-step solution for: 6.4.2 Energy Transfer worksheet
The task appears to involve identifying the energy transformations or processes occurring in each scenario. Below is a detailed explanation of each problem and its solution:
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- Description: A simple circuit with a battery (cell), a switch, and a lamp.
- Process: When the switch is closed, the chemical energy stored in the battery is converted into electrical energy. This electrical energy flows through the circuit and reaches the lamp. The lamp converts the electrical energy into light energy (and some heat energy).
- Solution:
- Energy Transformation: Chemical energy → Electrical energy → Light energy (and heat energy).
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- Description: A circuit with a battery (cell), a switch, a motor, and a fan.
- Process: When the switch is closed, the chemical energy from the battery is converted into electrical energy. The motor converts this electrical energy into mechanical energy, which drives the fan. The fan then uses this mechanical energy to move air.
- Solution:
- Energy Transformation: Chemical energy → Electrical energy → Mechanical energy.
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- Description: A hairdryer is switched on.
- Process: When the hairdryer is turned on, electrical energy from the power source (e.g., a wall outlet) is used. Inside the hairdryer, the electrical energy is converted into both mechanical energy (to drive the fan) and thermal energy (heat generated by the heating element). The fan blows air, and the heated air dries hair.
- Solution:
- Energy Transformation: Electrical energy → Mechanical energy + Thermal energy.
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- Description: A loudspeaker is switched on and then off.
- Process: When the loudspeaker is turned on, electrical energy is supplied to it. The loudspeaker converts this electrical energy into sound energy by vibrating a diaphragm. When the loudspeaker is turned off, the electrical supply stops, and the sound production ceases.
- Solution:
- Energy Transformation: Electrical energy → Sound energy.
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- Description: A mass is lifted above the sand and then dropped.
- Process: When the mass is lifted, work is done against gravity, converting the kinetic energy of the person lifting the mass into gravitational potential energy stored in the mass due to its height. When the mass is dropped, the gravitational potential energy is converted back into kinetic energy as the mass falls. Upon hitting the sand, the kinetic energy is dissipated as heat and deformation energy in the sand.
- Solution:
- Energy Transformation: Kinetic energy → Gravitational potential energy → Kinetic energy → Heat and deformation energy.
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Summarizing the solutions for all problems:
1. Cell and Lamp: Chemical energy → Electrical energy → Light energy (and heat energy).
2. Cell, Motor, and Fan: Chemical energy → Electrical energy → Mechanical energy.
3. Hairdryer: Electrical energy → Mechanical energy + Thermal energy.
4. Loudspeaker: Electrical energy → Sound energy.
5. Dropping Masses: Kinetic energy → Gravitational potential energy → Kinetic energy → Heat and deformation energy.
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\boxed{
\begin{array}{l}
\text{6. Chemical energy → Electrical energy → Light energy (and heat energy)} \\
\text{7. Chemical energy → Electrical energy → Mechanical energy} \\
\text{10. Electrical energy → Mechanical energy + Thermal energy} \\
\text{11. Electrical energy → Sound energy} \\
\text{12. Kinetic energy → Gravitational potential energy → Kinetic energy → Heat and deformation energy}
\end{array}
}
$$
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Problem 6: Cell and Lamp
- Description: A simple circuit with a battery (cell), a switch, and a lamp.
- Process: When the switch is closed, the chemical energy stored in the battery is converted into electrical energy. This electrical energy flows through the circuit and reaches the lamp. The lamp converts the electrical energy into light energy (and some heat energy).
- Solution:
- Energy Transformation: Chemical energy → Electrical energy → Light energy (and heat energy).
---
Problem 7: Cell, Motor, and Fan
- Description: A circuit with a battery (cell), a switch, a motor, and a fan.
- Process: When the switch is closed, the chemical energy from the battery is converted into electrical energy. The motor converts this electrical energy into mechanical energy, which drives the fan. The fan then uses this mechanical energy to move air.
- Solution:
- Energy Transformation: Chemical energy → Electrical energy → Mechanical energy.
---
Problem 10: Hairdryer
- Description: A hairdryer is switched on.
- Process: When the hairdryer is turned on, electrical energy from the power source (e.g., a wall outlet) is used. Inside the hairdryer, the electrical energy is converted into both mechanical energy (to drive the fan) and thermal energy (heat generated by the heating element). The fan blows air, and the heated air dries hair.
- Solution:
- Energy Transformation: Electrical energy → Mechanical energy + Thermal energy.
---
Problem 11: Loudspeaker
- Description: A loudspeaker is switched on and then off.
- Process: When the loudspeaker is turned on, electrical energy is supplied to it. The loudspeaker converts this electrical energy into sound energy by vibrating a diaphragm. When the loudspeaker is turned off, the electrical supply stops, and the sound production ceases.
- Solution:
- Energy Transformation: Electrical energy → Sound energy.
---
Problem 12: Dropping Masses
- Description: A mass is lifted above the sand and then dropped.
- Process: When the mass is lifted, work is done against gravity, converting the kinetic energy of the person lifting the mass into gravitational potential energy stored in the mass due to its height. When the mass is dropped, the gravitational potential energy is converted back into kinetic energy as the mass falls. Upon hitting the sand, the kinetic energy is dissipated as heat and deformation energy in the sand.
- Solution:
- Energy Transformation: Kinetic energy → Gravitational potential energy → Kinetic energy → Heat and deformation energy.
---
Final Answer
Summarizing the solutions for all problems:
1. Cell and Lamp: Chemical energy → Electrical energy → Light energy (and heat energy).
2. Cell, Motor, and Fan: Chemical energy → Electrical energy → Mechanical energy.
3. Hairdryer: Electrical energy → Mechanical energy + Thermal energy.
4. Loudspeaker: Electrical energy → Sound energy.
5. Dropping Masses: Kinetic energy → Gravitational potential energy → Kinetic energy → Heat and deformation energy.
$$
\boxed{
\begin{array}{l}
\text{6. Chemical energy → Electrical energy → Light energy (and heat energy)} \\
\text{7. Chemical energy → Electrical energy → Mechanical energy} \\
\text{10. Electrical energy → Mechanical energy + Thermal energy} \\
\text{11. Electrical energy → Sound energy} \\
\text{12. Kinetic energy → Gravitational potential energy → Kinetic energy → Heat and deformation energy}
\end{array}
}
$$
Parent Tip: Review the logic above to help your child master the concept of energy transfer worksheet.
