Physics

The three types of heat transfer_x000D_ Heat is transfered via solid material (conduction), liquids and gases (convection), and electromagnetical waves (radiation). Heat is usually transfered in a combination of these three types and seldomly occurs on its own.

The outside surface of a utensil used for heating is coated black so that it may absorb more heat and make heating quicker. This is because black surface is a good absorber of heat.

Beta particles are fast moving electrons which are emitted by the nucleus.

In the electrical circuit of a house, the fuse acts as a safety device.

A flight data recorder (FDR) is an electronic device employed to record any instructions sent to any electronic systems on an aircraft. Another kind of flight recorder is the cockpit voice recorder which records conversation in the cockpit, radio communications between the cockpit crew and others (including conversation with air traffic control personnel), as well as ambient sounds. Popularly referred to as a “black box” by the media, the data recorded by the FDR is used for accident investigation as well as for analyzing air safety issues, material degradation and engine performance.

A colour-blind person cannot distinguish between certain colours.

Stars appear twinkling because of scattering of light.

The square of the time period of the planet is directly proportional to the cube of the semimajor axis of its orbit.

Light travels at the fastest speed in Vacuum.

Compressions and Rarefactions are characteristic of longitudinal waves.