P1. Reducing unwanted energy transfers

Question 1

What is meant by unwanted energy transfers?

Answer 1

Unwanted energy transfers refer to energy that is not used for the intended purpose and is lost to the surroundings, often as heat.

Question 2

True or False: Reducing unwanted energy transfers can improve the efficiency of devices.

Answer 2

True

Question 3

Fill in the blank: Insulation is used to reduce ______ energy transfers.

Answer 3

unwanted

Question 4

What is one method of reducing unwanted energy transfers in homes?

Answer 4

Using double-glazed windows.

Question 5

Multiple Choice: Which of the following is NOT a method to reduce unwanted energy transfers? A) Insulation B) Lubrication C) Heating D) Reflective surfaces

Answer 5

C) Heating

Question 6

Short Answer: Name one type of material commonly used for insulation.

Answer 6

Fiberglass

Question 7

What role do thermal conductors play in unwanted energy transfers?

Answer 7

Thermal conductors allow heat to transfer easily, which can lead to unwanted energy loss.

Question 8

True or False: All energy transfers are useful.

Answer 8

False

Question 9

Fill in the blank: The process of _______ can help reduce unwanted energy transfers in electrical devices.

Answer 9

designing

Question 10

Multiple Choice: Which of the following strategies can reduce energy loss in transport? A) Streamlined shapes B) Heavy materials C) Increased speed D) Open windows

Answer 10

A) Streamlined shapes