Explanation

Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal.

It has both medical and industrial uses.

Explanation

Spherical shape is because drop always tends to acquire minimum surface area due to the surface tension, and for a given volume, the surface area of sphere is minimum.

Explanation

Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table.

Explanation

The world`s largest pink diamond mine, Argyle mine, has announced to shut down its operation after 40 years of business operation. The mine is based in Australia.

The world`s larges pink diamond mine, Argyle mine, in the remote Kimberley region of western Australia, has announced that it is shutting down its business, after 40 years of a successful operation.

Explanation

The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure.

Explanation

Deuterium, (D, or 2H), also called heavy hydrogen.

Deuterium is an isotope of hydrogen.

In the simple hydrogen molecule, 

there is one proton,

one electron,

and no neutrons,protons,electrons,

and neutrons being the elementary particles that make up the atom.).

while 

Deuterium, on the other hand, is composed of one proton, one electron, and one neutron.

ND11-07-2023

Explanation

The loss of water vapor to the atmosphere through stomata is a passive process, meaning that metabolic energy in the form of ATP is not required for water movement.

The energy driving transpiration is the difference in energy between the water in the soil and the water in the atmosphere.

Explanation

Water has a maximum density of 4 degrees Celsius.

while

Water freezes at 0 degrees Celsius and 32 degrees Fahrenheit.

Explanation

Kerosene, is a combustible hydrocarbon liquid which is derived from petroleum.

It is widely used as a fuel in aviation and households.

Explanation

Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun. 

When a comet's orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets.