#### Pressure in a Gas

Gas Pressure is created when gas particles collide with the walls of their container. The more often…

#### Wave Speed

Wave speed is given in meters per second (the number of waves that pass per second)….

#### Turning Moments

The size of the turning effect is called a turning moment. As Newton’s first law…

#### Pressure

Pressure can be calculated if you know the force applied to or by an object and…

#### Force, Mass and Acceleration

An object of constant mass accelerates in proportion to the force applied. Demo In this tutorial you will learn…

#### Kinetic Energy

In physics, the kinetic energy (KE) of an object is the energy that it has due to its motion….

#### Power

The quantity power is the rate at which work is done. The quicker work is…

#### Charge

The size of the current is the rate of flow of charge. Electrons are negatively…

#### Resistance

Resistance is an electrical quantity that measures how a device or material reduces the electrical…

#### Electrical Power

The power of an appliance is the energy that is transferred per second. Electric power…

#### Density

Density is a measure of how compact the particles are in a substance. Density is defined…

#### Half Life

The radioactivity of a sample decreases over time. Half life is a measurement of this…

#### Gravitational Potential Energy

Lifting an object in a gravitational field transfers energy into the objects gravitational energy store….

#### Efficiency

The efficiency of a device is the proportion of input energy that is converted to…

#### Energy Transformed

The potential difference between two points is the energy transferred per unit charge. An electrical…

#### Forces and Work Done

The unit for work done is the joule (J), or Newton meter (N-m). One joule is equal…

#### Wave Period

The period of a wave is the time it takes to complete one cycle. The unit for…

#### Uniform Acceleration

Uniform or constant acceleration is a type of motion in which the velocity of an object changes by…

#### Pressure in Fluids

Fluid pressure is exerted on the surface of an object in a liquid. This pressure causes upthrust . An…

#### Acceleration

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

#### Speed

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

#### Weight on the Moon

Weight is the force acting on an object due to gravity. The weight of an object is…

#### Weight on Earth

Weight is the force acting on an object due to gravity. The weight of an object can…