Question 1

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

A fryer with a low energy efficiency rating (%)
A fryer with a low energy efficiency rating (%)

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 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

191J
191J

36.625J

Answer 1

Question 1: The option that is NOT something you should be looking for when choosing an energy-efficient air fryer is:

A fryer with a low energy efficiency rating (%)

This is because you would want to look for a high energy efficiency rating to ensure that the air fryer is energy-efficient.

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Question 2: To determine how much energy is used to cook the meal, we need to consider the efficiency of the air fryer.

• If the air fryer uses 239 Joules and has an efficiency of 80%, that means 80% of the energy is used efficiently for cooking, and the rest is wasted.

To find the actual energy used in cooking, we can use the formula:

\( \text{Effective Energy Used} = \text{Total Energy} \times \text{Efficiency} \)

Therefore:

\( \text{Effective Energy Used} = 239 , \text{J} \times 0.80 = 191.2 , \text{J} \)

Since the options are rounded, the closest answer is:

191J