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Pressure in a Gas

Gas Pressure is created when gas particles collide with the walls of their container. The more often the particles collide with the walls, and the faster they are moving, the greater the pressure.

Demo

In this tutorial you will learn how to calculate the gas pressure in enclosed spaces depending on the containers volume.

Note-Some mobile devices may require you to tap full screen during playback to view video content.

The formula for this equation is written like this:

$pV = { \text K}$

Chilled practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

A gas in a sealed container has a volume of 12 m3. The pressure of the gas is 80 Pa. The volume of the container is increased and the pressure falls to 60 Pa. What is the new volume of the container ? The temperature of the gas remains unchanged.

Frozen practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

The volume of a gas is reduced from 10 m3 to 2.5 m3 . The original pressure is 200 Pa. Calculate the new pressure.

Science in context

Pressure in a gas is caused when gas particles collide with the walls of their container. The more often the particles collide with the walls, and the faster they are moving when they do this, the greater the pressure. This is why the pressure in a tyre goes up when more air is pumped in.

Millie’s Master Methods

Millie’s Magic Triangle

The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an equation allowing …
Start Learning

Calculation Master Method

Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure you gain …
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Kinetic Energy

In physics, the kinetic energy (KE) of an object is the energy that it has due to its motion. It is defined as the work needed for an object of a known mass to accelerate to a given velocity.

What is Kinetic energy?

In physics, the kinetic energy (KE) of an object is the energy that it has due to its motion. It is defined as the work needed for an object of a known mass to accelerate to a given velocity.

Kinetic energy equation

To calculate Kinetic energy we write the equation like this.

$E_k = { 1 \over2} mv {^2}$

Kinetic energy demo

In this tutorial you will learn how to calculate the energy stored in a moving object.

Chilled practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

Calculate the Kinetic energy store in a car with a mass of 850 Kg moving at a velocity of 3.5 m/s.

Frozen practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

A meteorite has 8000 J of Kinetic energy, calculate its mass if it has a velocity of 20 m/s

Science in context

Anything that is moving has energy in its kinetic energy store.

Millie’s Master Methods

Millie’s Magic Triangle

The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an equation allowing …
Start Learning

Calculation Master Method

Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure you gain …
Start Learning

The Fridge Physics Store

Magnification

The magnification can be calculated if you know the actual size of the object and its image size.

Demo

In this tutorial you will learn how to calculate the magnification of objects in given examples.

Note-Some mobile devices may require you to tap full screen during playback to view video content.

The equation is written like this:

Magnification = image height / object height

Chilled practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

Calculate an objects magnification if the image height is 70 mm and the object height is 28 mm.

Frozen practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

Calculate the image height if an object height is 25 mm and the magnification is 3.5.

Science in context

The magnification can be calculated if you know the actual size of the object and its image size.

Millie’s Master Methods

Millie’s Magic Triangle

The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an equation allowing …
Start Learning

Calculation Master Method

Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure you gain …
Start Learning

The Fridge Physics Store

Acceleration

Acceleration is how quickly the velocity is changing whether it be speed, direction or both. Acceleration is a measure of how quickly the velocity of an object is changing.

Demo

In this tutorial you will learn how to calculate the acceleration of a moving object.

The equation is written like this:

$a = { v \unicode{x2013} u \over \text{t}}$

Chilled practice question

Calculate the acceleration if the velocity increases from 4 m/s to 76 m/s in 8 s.

Frozen practice question

How long does it take for the velocity of a bus to increase from 12 m/s to 20 m/s if it is accelerating at 4 m/s2.

Science in context

Acceleration is how quickly the velocity is changing whether it be speed, direction or both.

Millie’s Master Methods

Millie’s Magic Triangle

The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an equation allowing …
Start Learning

Calculation Master Method

Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure you gain …
Start Learning

The Fridge Physics Store

Speed

Speed is how fast an object is moving in no given direction. Velocity is how fast an object is moving in a given direction. In physics, you can calculate the average speed by taking the total distance travelled and dividing it by the total time required to travel that distance.

Demo

In this tutorial you will learn how to calculate the speed of an object, velocity is speed with direction for example 20 m/s north.

The equation is written like this:

$S = { \text D / T}$

Chilled practice question

Calculate the speed of a car which travels 2000 m in 400 s.

Frozen practice question

How long does it take a car to travel 360 m at 12 m/s ?

Science in context

Speed is how fast an object is moving in no given direction. Velocity is how fast an object is moving in a given direction.

Millie’s Master Methods

Millie’s Magic Triangle

The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an equation allowing …
Start Learning

Calculation Master Method

Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure you gain …
Start Learning

The Fridge Physics Store

Weight on the Moon

Weight is the force acting on an object due to gravity. The weight of an object is defined as the force of gravity on the object and can be calculated as the mass times the acceleration due to gravity.

Demo

In this tutorial you will learn how to calculate the weight of an object on the moon due to its force of gravity.

The equation is written like this:

${ \textit W} = {\text m \;} {\text x \;} {\text g}$

Chilled practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

Calculate the weight of a flag pole on the moon, it has a mass of 5 Kg.

Frozen practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

What is the mass of an oxygen cylinder on the moon if it has a weight of 4.8 N ?

Science in context

Weight is the force acting on an object due to gravity.

Millie’s Master Methods

Millie’s Magic Triangle

The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an equation allowing …
Start Learning

Calculation Master Method

Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure you gain …
Start Learning

The Fridge Physics Store

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