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Answer :
To calculate the efficiency of the hair dryer, we need to use the following formula:
Efficiency (%) = (Useful Energy Output / Total Energy Input) × 100
Let's break this down step-by-step with the information provided:
1. Determine the Total Energy Input:
- The hair dryer takes in 3000 Joules of energy per second. This is the total energy input.
2. Determine the Useful Energy Output:
- The hair dryer transfers 600 Joules as useful energy. This is the amount of energy that is effectively used for the desired operation.
3. Plug These Values into the Efficiency Formula:
- Efficiency = (600 J / 3000 J) × 100
4. Calculate the Efficiency:
- Divide 600 by 3000, which equals 0.2.
- Multiply 0.2 by 100 to convert it to a percentage.
5. Result:
- The efficiency of the hair dryer is 20%.
This means that 20% of the energy used by the hair dryer is effectively converted into useful output energy, while the rest is lost in the transformation process, usually as heat.
Efficiency (%) = (Useful Energy Output / Total Energy Input) × 100
Let's break this down step-by-step with the information provided:
1. Determine the Total Energy Input:
- The hair dryer takes in 3000 Joules of energy per second. This is the total energy input.
2. Determine the Useful Energy Output:
- The hair dryer transfers 600 Joules as useful energy. This is the amount of energy that is effectively used for the desired operation.
3. Plug These Values into the Efficiency Formula:
- Efficiency = (600 J / 3000 J) × 100
4. Calculate the Efficiency:
- Divide 600 by 3000, which equals 0.2.
- Multiply 0.2 by 100 to convert it to a percentage.
5. Result:
- The efficiency of the hair dryer is 20%.
This means that 20% of the energy used by the hair dryer is effectively converted into useful output energy, while the rest is lost in the transformation process, usually as heat.
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