Physics

Types of Heat Transfer: Conduction

len Alfred Ajibola - Thu, 26th December, 2019 @ 17:25: PM

Topics in Physics

Derived Units: Similarities and Differences with Fundamental Units Gravity: Interesting facts on Gravity Relative Density of Substances and Specific Gravity Types of Heat Transfer: Conduction Types of Heat Transfer: Convection Types of Heat Transfer: Radiation Physics Scheme of Work, SS1, First Term Physics Scheme of Work, SS1, Second Term Physics Scheme of Work, SS1, Third Term Velocity and Acceleration Newton's Laws of Motion Importance of Gravity What is Density? Density of various Substances Concepts of Force and Motion Motion and Speed Concept of Heat Transfer Concepts of Heat and Temperature Gravity: What is Gravity? Zeroth Law of Thermodynamics - Thermal Equilibrium Fundamental Quantities and Units in Physics


Academic Questions in Physics

Please check out our Test Your Knowledge page to see all Questions and Answers

The rate of change of momentum is proportional to the applied force and will take place in the direction of that force.

The above statement is attributed to _____.

  • A. Albert Einstein

  • B. Isaac Newton

  • C. Galileo Galilei

  • D. Neils Bohr

  • E. Ernest Rutherford

  • F. Marie Curie

The Law of Inertia is also referred to as _____.

  • A. 1st Law of Thermodynamics
  • B. 2nd Law of Thermodynamics
  • C. 3rd Law of Thermodynamics
  • D. Newton's 1st Law of Motion
  • E. Newton's 2nd Law of Motion
  • F. Newton's 3rd Law of Motion

The process whereby the velocity of an object increases and decreases over a period of time is best associated with the term _____.

  • A. Speed
  • B. Velocity
  • C. Momentum
  • D. Constant Velocity
  • E. Acceleration
  • F. Average Velocity

The rate of motion is best referred to as _____.

  • A. Speed
  • B. Velocity
  • C. Momentum
  • D. Inertia
  • E. Acceleration
  • F. Constant Velocity

Consider this expression below:

A body X exerts a force FX on another body Y. In return, body Y exert a force FY back on body X. The forces FX and FY are equal in magnitude but opposite in direction.

Putting the above expression into equation:

FX = -FY

Where FX is the action force

FY is the reaction Force

The above expression relates to _____.

  • A. Theory of Force
  • B. Force Postulate
  • C. Einstein's proposal on Relativity
  • D. Newton's 1st law of motion
  • E. Newton's 2nd law of motion
  • F. Newton's 3rd law of motion

The tendency of a body to remain in a state of rest or in uniform motion is referred to as _____.

  • A. Tension
  • B. Uniform acceleration
  • C. Constant acceleration
  • D. Deceleration
  • E. Inertia
  • F. Velocity

A change in the position of an object with reference to time is best described as _____.

  • A. Momentum
  • B. Displacement
  • C. Velocity
  • D. Acceleration
  • E. Direction
  • F. Motion

The saying 'what goes up on earth must come down' can be best attributed to _____.

  • A. Force
  • B. Motion
  • C. Mass
  • D. Acceleration
  • E. Average velocity
  • F. Constant velocity

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Heat Transfer - Conduction:

Conduction can be defined as the transfer of heat energy from one point to another through a solid material called a conductor.

Think of a conductor as a solid material through which electricity, heat and sound can flow through.

Note: Metals are generally good conductors.

Please read on the Physical Properties of Metal here.

Let's explain heat transfer by conduction through this simple experiment which you may carry out at home.

The image below shows a simple experiment where heat is transferred via conduction through a thin metallic rod. (The thin metallic rod acts as a conductor in this instance).

Heat Transfer by Conduction - Len Academy

From the above image, the 'hand' holding the thin metallic rod (conductor) will eventually feel its 'hotness'. This is so because heat (from the candle fire) had been transferred through the thin metallic rod.

Please read on the Concept of Heat and Temperature here.

Heat transfer via conduction is an observable phenomenon during the process of cooking. In this case, the pot (which acts as a conductor here) transfers the heat of the fire through conduction into its contents. As a result, the contents of the pot becomes cooked (or boiled in the case of water).

Similarly, heat from the cooking pot is transferred via conduction to whomever touches it with their bare hands.


Below is another simple experiment on heat transfer via conduction. It can also be carried out at home.

  • Step 1: Boil 3 cups of water in a pot. When the water is very hot, put out the gas.

  • Step 2: Get another pot and fill it with 3 cups of cold water.

  • Step 3: Get an iron rod and make both ends of its edge contact both waters (the hot water and the cold water respectively).

Please read on Heat Transfer via Convection here.

Observation: After we carry out the above procedure, an increase in the temperature of the iron rod will be observed as heat is eventually transferred into the cold water through the iron rod. The iron rod in this instance acts as a conductor and it transfers heat through conduction.

The movement of heat energy in the above experiment will follow the path below:

Hot Water >> Iron Rod >> Cold Water

Please read on Heat Transfer via Radiation here.

Note: It is the transfer of heat energy that brought about an increased temperature in the iron rod and then, the cold water; nothing more, nothing less.

Please read on Solids and their Characteristics here.

Below are some notable points concerning the experiment:

  1. Heat is the only factor that escaped from the warm water.
  2. Heat is the only factor that was gained by the iron rod.
  3. Heat is the only factor that was gained by the cold water.
  4. With regards to the iron rod, the heat gain will increase its particles vibrational kinetic energy.
    Please read on the Concept of Heat Transfer to comprehend (Vibrational and Rotational) Kinetic Energy.
  5. With regards to the cold water, the heat gain will increase its particles rotational kinetic energy.

This heat transfer will continue until equilibrium is achieved; (that is; the water inside both cups and the connecting iron rod eventually attain the same temperature).

Please read on the Zeroth Law of Thermodynamics here.

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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.


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Amazing facts in Physics

Glass Ball - Len Academy

Glass Balls actually bounce higher than Rubber Balls

Every planet has its own unique gravitational force. For instance, Mars has a gravity of 3.711 m/s2 while earth’s gravitational force is 9.807m/s2.

Please read on gravity here

When two metals are put together in space, they will stick together as if they are welded. This phenomenon is called cold welding

The fastest animal on land is Cheetah. It can reach a maximum speed of about 113km per hour.

Please read on motion, speed, velocity and acceeration here


NOTABLE POINTS IN Physics

The Classical Mechanics (Laws of Motion) is a fundamental part of Physics.

Below are the Newton's Laws of Motion:

An object at rest will continue in its state of rest; while an object in uniform motion will continue in a straight line, unless an external force acts on it.

Newton's First Law of Motion.

Please read on Motion and Speed here.

The rate of change of momemtum is proportional to the applied force and will take place in the direction of that force.

Newton's Second Law of Motion.

To every action, there is an equal and opposite reaction.

Newton's Third Law of Motion.

Please read on Newton's Laws of Motion here.

The study of Thermodynamics revolves around the relationship between heat, temperature, energy and mechanical work; and these can be summarised under the 4 laws of Thermodynamics (Numbered zero through three).

You can read on the Concepts of Heat and Temperature here.

Below are the 4 laws of thermodynamics:

Zeroth law of thermodynamics – If two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other.

Please read on the Zeroth Law of Thermodynamics here.

1st law of thermodynamics – Energy can neither be created nor destroyed but can be changed from one form to another.

You can read on the Food Chain here.

2nd law of thermodynamics – The entropy of an isolated system not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium.

3rd law of thermodynamics – As temperature approaches absolute zero, the entropy of a system approaches a constant minimum.

Fuses are present in many electrical devices. They are basically 🔥 fire-breakers 🔥

If there is a power surge, the fuse will break, preventing damage to the electrical devices. It will also prevent the incidence of 🔥 fire🔥 on or from such device.

Physics is one of the core sciences.

Physics is defined the scientific study of matter and the movement of matter through the space and time of the universe.

Understanding the basic and fundamental concepts of physics will help you better comprehend this subject. Below are some of the concepts:

  1. The Laws of Motion (Classical Mechanics)
  2. Electromagnetism
  3. Relativity
  4. Thermodynamics

Please read on the basic introduction of the above physics concept here