Explanation

Benjamin Franklin invented the lightning rod, a device used to protect buildings from lightning strikes.

He made this invention in 1752 as part of his experiments with electricity.

Explanation

Eratosthenes, the ancient Greek scholar is called the 'father of geography'.

He was the first one to use the word geography.

He also had a small-scale notion of the planet that helped him to determine the circumference of the earth.

Explanation

Nichrome, an alloy of nickel and chromium.

It is used because of its high resistance and ability to withstand high temperatures without oxidizing.

Explanation

The potential of pure water is zero.

Standard Electrochemical Potential:

The standard electrode potential of pure water is considered zero because it is the reference point against which other electrode potentials are measured.

Chemical Potential:

In thermodynamics, the chemical potential of pure water in its standard state (typically at 1 atm pressure and 25°C) is taken as a reference and thus has a relative value of zero.

Explanation

Petroleum, natural gas & coal are called non-renewable energy sources.

The most popular renewable energy sources currently are:

1.      Solar energy

2.      Wind energy

3.      Hydro energy

4.      Tidal energy

5.      Geothermal energy

6.      Biomass energy

RK12-12-2022

Explanation

Pneumonia is often caused by Streptococcus pneumoniae.

It is a type of bacteria that leads to lung inflammation and infection.

It affecting breathing and oxygen intake.

Explanation

Evaporation happens when a liquid turns into a gas.

It can be easily visualized when rain puddles “disappear” on a hot day or when wet clothes dry in the sun.

In these examples, the liquid water is not actually vanishing—it is evaporating into a gas, called water vapor.

Explanation

Vestigial organs are organs, tissues or cells in a body

Which are no more functional the way they were in their ancestral form of the trait.

Explanation

Explanation

1. Mercury

Swift Planet for Mercury

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2. Venus

Eight planets in the solar system