Explanation

LED stands for Light Emitting Diode

It is a semiconductor device that emits light when current flows through it.

LED lighting products produce light up to 90%.

Invented:

H. J. Round (1907);

Oleg Losev (1927);

James R. Biard (1961);

Nick Holonyak (1962)

First production: October 1962

Explanation

• BCC stands for: Blind Carbon Copy
  • Used in: Email communication
  • Purpose: Hides recipient email addresses from other recipients

Additional information:

• CC (Carbon Copy): Recipients are visible to all
• BCC: Recipients are hidden from everyone except the sender

Last verified on 16-01-2026

Explanation

Rex is the Latin word for king.

It is used in historical and legal contexts.

It appears in names of kings, on coins, and in official titles.

Additional information:

Regina is the female counterpart, meaning queen.

“Rex” has been used in titles of British monarchs, e.g., George Rex.

Last verified on 16-01-2026

Explanation

CPU stands for Central Processing Unit

**

CPU is an example of hardware

A CPU contains  A control unit and an arithmetic logic unit

The CPU and memory are located on Motherboard.

The motherboard holds CPU, RAM and ROM chips, etc.

**

 Buses are connections or gateways between the CPU and other devices.

Explanation

• LNG, or liquefied natural gas, is simply natural gas converted into a liquid by cooling it to -260°F (−162 °C).
• This process reduces its volume by a factor of more than 600.
• This allows natural gas to be transported efficiently by sea.
• LNG is mainly constituted of 90% methane and some mixture of ethane, propane, butane, some heavier alkanes, and nitrogen.
• It is odorless, colorless, non-toxic, and non-corrosive.