### Other Chapters For 7th

• 7th-class Maths Chapter 28

Statistics is a branch of mathematics dealing with the collection, analysis, interpretation,...
• 7th-class Maths Chapter 28

Division is one of the four basic operations of arithmetic, the others being addition,...
• 7th-class Maths Chapter 27

n probability theory, an experiment or trial (see below) is any procedure that can be infinitely...
• 7th-class Maths Chapter 26

The only difference between cubes and cuboids is the shape of the six faces. Each face of...
• 7th-class Maths Chapter 25

In calculus, integration by substitution, also known as u-substitution, is a method for finding...
• 7th-class Maths Chapter 24

Proportionality may refer to: Proportionality (mathematics), the relationship between two...
• 7th-class Maths Chapter 23

Probability is the measure of the likelihood that an event will occur. See glossary of...
• 7th-class Maths Chapter 22

The 'perimeter' of a shape is the distance around it. In order to calculate the perimeter of a...
• 7th-class Maths Chapter 19

A fraction (from Latin fractus, "broken") represents a part of a whole or, more generally, any...
• 7th-class Maths Chapter 18

Mental calculation or mental maths is an old mathematical tool. It is doing maths without using...

# 7th Class Chapter No 26 - Energy Transfers in Science for IGCSE

forms of energy: thermal (heat), light, electrical, sound, kinetic, chemical, nuclear and potential (elastic and gravitational)

Conservation of energy : energy is never created or destroyed, it changes from one form to another.

Unit of energy: joule (J)

efficiency = useful energy output / total energy output energy transfer may take place by conduction, convection and radiation

Posted in 7th on February 13 2019 at 03:29 PM

### IGCSE 7th CLASS Science OTHER CHAPTERS

• 7th-class Science Chapter 28

Energy is an important ingredient in all phases of society. We live in a very interdependent...
• 7th-class Science Chapter 27

Heat transfer is a discipline of thermal engineering that concerns the generation, use,...
• 7th-class Science Chapter 25

Energy cannot be created or destroyed, only converted from one form to another. These...
• 7th-class Science Chapter 24

In everyday use and in kinematics, the speed of an object is the magnitude of its velocity (the...
• 7th-class Science Chapter 23

In physics, a moment is an expression involving the product of a distance and a physical...
• 7th-class Science Chapter 22

At terminal velocity the gravitational force down equals the air resistance force up. vehicle...
• 7th-class Science Chapter 21

The density, or more precisely, the volumetric mass density, of a substance is its mass per unit...
• 7th-class Science Chapter 20

Measurement is the assignment of a number to a characteristic of an object or event, which can...
• 7th-class Science Chapter 19

The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic...
• 7th-class Science Chapter 18

A metal is a material (an element, compound, or alloy) that is typically hard when in solid...