Question
You need to shop for a new air fryer. You want to buy one that is energy efficient. Which of the following is NOT what you should be looking for and evaluating when you are choosing an air fryer?(1 point)
Responses
How much of the energy used is turned into useful thermal energy and how much is wasted.
How much of the energy used is turned into useful thermal energy and how much is wasted.
The amount of energy that it takes to run the fryer through one normal cooking cycle
The amount of energy that it takes to run the fryer through one normal cooking cycle
A fryer with a low energy efficiency rating (%)
A fryer with a low energy efficiency rating (%)
A fryer with a high energy efficiency rating (%)
A fryer with a high energy efficiency rating (%)
Question 2
One air fryer for sale uses 239 Joules of energy to cook a meal and has an efficiency of 80%. How much energy will be used to cook this meal?(1 point)
Responses
191J
191J
158J
158J
319J
319J
36.625J
Responses
How much of the energy used is turned into useful thermal energy and how much is wasted.
How much of the energy used is turned into useful thermal energy and how much is wasted.
The amount of energy that it takes to run the fryer through one normal cooking cycle
The amount of energy that it takes to run the fryer through one normal cooking cycle
A fryer with a low energy efficiency rating (%)
A fryer with a low energy efficiency rating (%)
A fryer with a high energy efficiency rating (%)
A fryer with a high energy efficiency rating (%)
Question 2
One air fryer for sale uses 239 Joules of energy to cook a meal and has an efficiency of 80%. How much energy will be used to cook this meal?(1 point)
Responses
191J
191J
158J
158J
319J
319J
36.625J
Answers
GPT-4o mini
For Question 1, the option that is NOT something you should be looking for when choosing an air fryer is:
**A fryer with a low energy efficiency rating (%)**
This is because you want a high energy efficiency rating to ensure that the appliance uses energy effectively.
---
For Question 2, if an air fryer uses 239 Joules of energy with an efficiency of 80%, we can calculate the useful energy output and wastage. The formula for efficiency is:
\[
\text{Efficiency} = \frac{\text{Useful Energy Output}}{\text{Total Energy Input}} \times 100
\]
Given that the total energy input (239 Joules) and efficiency is 80%, we need to find out how much energy is effectively used.
To find the useful energy output, we multiply the total energy input by the efficiency (as a decimal):
\[
\text{Useful Energy Output} = \text{Total Energy Input} \times \left(\frac{\text{Efficiency}}{100}\right) = 239 \times 0.80 = 191.2 \, \text{Joules}
\]
Since we typically wouldn't round measurements, we can safely say that **191J** is the answer to how much energy will effectively be used to cook this meal.
So the correct answer is:
**191J**
**A fryer with a low energy efficiency rating (%)**
This is because you want a high energy efficiency rating to ensure that the appliance uses energy effectively.
---
For Question 2, if an air fryer uses 239 Joules of energy with an efficiency of 80%, we can calculate the useful energy output and wastage. The formula for efficiency is:
\[
\text{Efficiency} = \frac{\text{Useful Energy Output}}{\text{Total Energy Input}} \times 100
\]
Given that the total energy input (239 Joules) and efficiency is 80%, we need to find out how much energy is effectively used.
To find the useful energy output, we multiply the total energy input by the efficiency (as a decimal):
\[
\text{Useful Energy Output} = \text{Total Energy Input} \times \left(\frac{\text{Efficiency}}{100}\right) = 239 \times 0.80 = 191.2 \, \text{Joules}
\]
Since we typically wouldn't round measurements, we can safely say that **191J** is the answer to how much energy will effectively be used to cook this meal.
So the correct answer is:
**191J**