MYTUTOR SUBJECT ANSWERS

419 views

What are the different ways that energy can be transferred?

There are three methods of energy transfer that we need to learn: conduction, convection, and radiation.

1. Conduction:

Heat is thermal energy, and in solids it can be transferred by conduction. Heat is passed along from the hotter end of an object to the cold end by the particles in the solid vibrating. The hotter particles vibrate a lot and cause the particles next to them to vibrate as they gain heat energy too. Solids are heat conductors due to how tightly packed their particles are.

For example: When a saucepan is put on a hob, overtime the handle will get hot too. Due to conduction -> the heat from the bottom of the pan will cause the particles to vibrate and then cause all the surrounding particles to vibrate until the handle is hot too.

2. Convection:

Fluids, that is both gases and liquids, can transfer heat energy by convection. It is easiest to explain this while thinking of an example:

Imagine a beaker of water being heated from the bottom. As the water particles at the bottom get hot, they expand and become less dense. This means they will rise to the top of the beaker, and other colder water particles will fall to replace them. After a while, the 'new' cold particles at the bottom will be heated and they will then rise to the top as they will be less dense. The water at the top which was first heated will have slightly cooled by then, so will sink down to the bottom, but then will be reheated and the same process will happen again.

This constant flow of the fluid due to the expansion / change in density of the particles is called a convection current. Over time all the fluid reaches a constant temperature.

3. Radiation:

Radiation is different to the other two processes as it doesn't require particles in its transfer of energy. Instead, infra-red radiation is a type of electromagnetic radiation. This means that the energy is transferred by waves rather than particles.

Radiation is how we feel the heat from the sun on Earth, as waves can pass through the vacuum of space where there are no particles.

Lois M. GCSE Maths tutor, A Level Maths tutor, GCSE Physics tutor

12 months ago

Answered by Lois, a GCSE Physics tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

139 SUBJECT SPECIALISTS

£18 /hr

Tom V.

Degree: Mechanical Engineering (Masters) - Leeds University

Subjects offered: Physics, Maths

Physics
Maths

“About MeHello! I'm Tom, I'm in my first year studying mechanical engineering at the University of Leeds. I've always loved sicence, being particularly drawn to physics and maths from a young age. I loved the methodical, logical appro...”

£18 /hr

Raghav A.

Degree: Chemical Engineering (Masters) - Bath University

Subjects offered: Physics, Maths+ 2 more

Physics
Maths
Chemistry
-Personal Statements-

“If you are looking for a tutor who is not only approachable and passionate about his subjects, but willing to go the extra mile, I am here to help”

£18 /hr

Anna W.

Degree: Medicine (Other) - Edinburgh University

Subjects offered: Physics, Maths+ 6 more

Physics
Maths
Dutch
Chemistry
Biology
.UKCAT.
-Personal Statements-
-Medical School Preparation-

“Who am I? My name is Anna and I am currently studying medicine at the University of Edinburgh. Previously I have rounded off the International Baccalaureate (IB) and during those years, I have been doing many extracurricular activitie...”

About the author

£18 /hr

Lois M.

Degree: Physics (Masters) - Exeter University

Subjects offered: Physics, Maths

Physics
Maths

“Hi! I'm Lois and I am currently in my second year of studying Physics at the University of Exeter. The past few years of my life have been filled to the brim with maths and physics, so I'm excited to be able to share what I've learned...”

You may also like...

Posts by Lois

What are the different methods of solving quadratic equations?

What are the different ways that energy can be transferred?

Other GCSE Physics questions

If v = 10, a = 2 and t = 4, what is u

Describe the model now used for the structure of an atom. Refer to the constituent particles including their relative masses and charges.

A sequence is defined by the recurrence relation u(n+1) = 1/3 u(n) + 10 with u(3) = 6 . Find the value of u(4) and the limit of the sequence.

Resistors of 5 ohms and 10 ohms are connected in series with a battery supplying 3 volts. What is the total resistance ? And calculate the current in the circuit.

View GCSE Physics tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok