Explanation

Combustion is when fuel reacts with oxygen to produce heat.

Chemical reactions that produce heat we call exothermic reactions.

Most vehicles use an engine to convert heat energy into mechanical energy.

 Mechanical energy gets transferred to the vehicle's moving parts, like wheels or propellers.

Explanation

In general, the cancer in a human body is caused by changes to DNA.

DNA stands for Deoxyribonucleic acid

Explanation

The angular momentum of an electron by Bohr is given by mvr or nh/2π

where v is the velocity,

n is the orbit in which the electron is revolving, m is the mass of the electron,

and r is the radius of the nth orbit

Explanation

A transformer operates on the principles of “electromagnetic induction”, in the form of Mutual Induction.

Mutual induction is the process by which a coil of wire magnetically induces a voltage into another coil located in close proximity to it.

Explanation

The study of the interaction between organisms and their surroundings is called ecology.

ecology that deals with the study of interactions between biotic and abiotic factors of the environment

Explanation

Tritium is an isotope of hydrogen that is composed of one proton, two neutrons, and one electron.

The symbol for tritium is 3^H.

The atomic number of tritium is 1 

the atomic mass of tritium is 3.

Explanation

Aluminium powed + Nitrate Called Ammonal  

Ammonal is an explosive made up of ammonium nitrate and aluminium powder, in which the ammonium nitrate functions as an oxidizer and the aluminium as fuel.

The mixture is often referred to as Tannerite, which is a brand of ammonal.

The ammonium nitrate functions as an oxidizer and the aluminium as fuel.

The use of the relatively cheap ammonium nitrate and aluminium makes it a replacement for pure TNT.

Explanation

The semiconductor band Gap is half-filled.

The term "band gap" refers to the energy difference between the valence band's top and the conduction band's bottom.

The band gap phenomenon occurs when two adjacent allowed bands are not wide enough to span the full range of electron energy levels.

Explanation

. LASER  stands for Light Amplification by Stimulated Emission of Radiations

LASER types

• Gas LASER
• Semiconductor LASER
• Chemical LASER
• Liquid or Dye LASER
• Excimer LASER

Properties of LASER

Explanation

Watts are defined as 1 Watt = 1 Joule per second (1W = 1 J/s)

1 kW = 1000 J/s. 

Additional Information:

The SI Unit of power is Watt.

1 Watt = 1 Joule/second.

1 Joule = 1 Newton-meter

1 Watt = 1 Newton=meter/second

NA21-8-2023