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
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
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.
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
158J
158J
319J
319J
36.625J
36.625J
191J
Responses
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
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.
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
158J
158J
319J
319J
36.625J
36.625J
191J
Answers
GPT-4o mini
For the first question, the option that is NOT something you should be looking for and evaluating when choosing an air fryer is:
**A fryer with a low energy efficiency rating (%)**.
This is because you typically want to select appliances with high energy efficiency ratings to minimize energy consumption.
For the second question regarding the air fryer that uses 239 Joules of energy with an efficiency of 80%, the formula to calculate the energy used based on efficiency is:
**Useful Energy Output = Energy Input × Efficiency**
Here, the energy used (input energy) is 239 Joules, and efficiency is given as 80% (or 0.80 in decimal form).
To find how much energy is actually used to cook the meal:
- Input energy = 239 J
- Efficiency = 0.80
The useful energy output would be:
\( \text{Useful Energy Output} = 239 J \times 0.80 = 191.2 J \)
Since we are looking for how much energy will be used to cook this meal, it would be the total energy input:
The answer is **239J** (though this specific option wasn't listed). The correct response considering choices available is the one closest to the thermal energy that is effectively converted, so approximately **191J** could be interpreted as the useful energy output, but since none of the options is 239J, it's crucial to clarify the context of the question regarding the phrasing of energy used.
**A fryer with a low energy efficiency rating (%)**.
This is because you typically want to select appliances with high energy efficiency ratings to minimize energy consumption.
For the second question regarding the air fryer that uses 239 Joules of energy with an efficiency of 80%, the formula to calculate the energy used based on efficiency is:
**Useful Energy Output = Energy Input × Efficiency**
Here, the energy used (input energy) is 239 Joules, and efficiency is given as 80% (or 0.80 in decimal form).
To find how much energy is actually used to cook the meal:
- Input energy = 239 J
- Efficiency = 0.80
The useful energy output would be:
\( \text{Useful Energy Output} = 239 J \times 0.80 = 191.2 J \)
Since we are looking for how much energy will be used to cook this meal, it would be the total energy input:
The answer is **239J** (though this specific option wasn't listed). The correct response considering choices available is the one closest to the thermal energy that is effectively converted, so approximately **191J** could be interpreted as the useful energy output, but since none of the options is 239J, it's crucial to clarify the context of the question regarding the phrasing of energy used.