David Sang Solutions for Chapter: Thermal (Heat) Energy Transfers, Exercise 7: End-of-chapter questions
David Sang Physics Solutions for Exercise - David Sang Solutions for Chapter: Thermal (Heat) Energy Transfers, Exercise 7: End-of-chapter questions
Attempt the free practice questions on Chapter 11: Thermal (Heat) Energy Transfers, Exercise 7: End-of-chapter questions with hints and solutions to strengthen your understanding. Cambridge IGCSE® Physics Coursebook Second Edition solutions are prepared by Experienced Embibe Experts.
Questions from David Sang Solutions for Chapter: Thermal (Heat) Energy Transfers, Exercise 7: End-of-chapter questions with Hints & Solutions
In cold climates, it is important to keep a house well insulated. Listed below are three ways of insulating a house. For each, explain how it reduces heat loss. In your answers, refer to conduction, convection or radiation, as appropriate.
Heavy curtains, when closed, trap air next to a window.
In cold climates, it is important to keep a house well insulated. Listed below is a way of insulating a house. For each, explain how it reduces heat loss. In your answers, refer to conduction, convection or radiation, as appropriate.
Shiny metal foil is fitted in the loft, covering the inside of the roof.
In cold climates, it is important to keep a house well insulated. Listed below are three ways of insulating a house. For each, explain how it reduces heat loss. In your answers, refer to conduction, convection or radiation, as appropriate.
Glass wool is used to fill the gap in the cavity walls.
Some water in a glass beaker is heated from below, as shown in the diagram.
The rate of energy supply is increased. The temperature of the water begins to rise again, but eventually becomes steady at a higher temperature. This time many bubbles are seen throughout the water.
What gas do the bubbles contain Choose one from
air, hydrogen, oxygen, steam
Name the process by which thermal energy is transferred through a metal rod.
Describe how this process occurs.
An iron rod and a copper rod of equal length are each held by hand at one end, with the other end in the flame from a Bunsen burner, as shown in the diagram.
The copper rod becomes too hot much sooner than the iron rod. What does this information tell you about iron and copper
Gas has to be above a certain temperature before it burns.The diagram shows two similar wire gauzes, one made of iron wire and made of copper wire. Each is held over a Bunsen burner. When the gas supply is turned on and ignited the gauze, the effect is as shown in the diagram.
How can these observations be explained
