Tag: science & technology

John Napier, a Scottish mathematician, invented logarithms in 1614 and published logarithm tables. This revolutionized mathematical calculations. Options B, C, and D are not historical mathematicians associated with this invention.

Joule is the SI unit of energy, defined as the work done by a force of one newton moving through one meter. Temperature is measured in kelvin, pressure in pascal, and heat (as energy transfer) also in joules.

The Heavy Water Board (HWB), responsible for production of heavy water for nuclear reactors, is headquartered in Mumbai. It operates under the Department of Atomic Energy.

The Indian Air Force was founded on 8 October 1932. Its Golden Jubilee (50th anniversary) was celebrated in 1982. The Diamond Jubilee (60th) was in 1992.

Bharat Electronics Limited (BEL), headquartered in Bengaluru, is a premier PSU manufacturing communication and radar equipment for the Indian armed forces and paramilitary organizations. GSL makes ships, BDL makes missiles.

SAARC has 8 member states: Afghanistan, Bangladesh, Bhutan, India, the Maldives, Nepal, Pakistan, and Sri Lanka. Thailand and Indonesia are not members (they are in ASEAN).

Electrons are subatomic particles with negligible mass (~1/1836 of a proton). Molecules are composed of atoms and are vastly larger than electrons. A single molecule can contain billions of electrons.

Electrons are subatomic particles with negligible mass (~1/1836 of a proton). Molecules are composed of atoms and are vastly larger than electrons. A single molecule can contain billions of electrons.

Electrons are subatomic particles with negligible mass (~1/1836 of a proton). Molecules are composed of atoms and are vastly larger than electrons. A single molecule can contain billions of electrons.

The square of 99 is 9801. You can calculate this as (100 - 1)² = 10000 - 200 + 1 = 9801, or memorize it as 99² = 9801.