Explanation

A chord is a line segment whose ends lie on the ends of a circle.

Explanation

Generally, alarm is followed by preposition by.

Alarm by something means چوکس، چوکنا یا خبردار رہنا

I was alarmed of his death.

ND17-1-2023

Explanation

Explanation

Plasma is a pale yellow mixture of water, proteins, and salts.

One of the functions of plasma is to act as a carrier for blood cells, nutrients, enzymes, and hormones.

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ND17-1-2023

Explanation

Chewing or mastication is the process by which food is crushed and ground by teeth.

It is the first step of digestion,

and it increases the surface area of foods to allow a more efficient breakdown by enzymes.

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ND17-1-2023

Explanation

Oxygen is the most abundant element contained within living organisms

Oxygen composes about 65% of the whole-body mass

while 

Calcium is the most abundant mineral in the human body,

calcium makes up 1.5 to 2% of the total body weight.

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ND17-1-2023

Explanation

The transformer work only on an AC supply

because A transformer needs an alternating current that will create a changing magnetic field

note:

The transformer does not work on DC.

Direct current doesn't have a variable magnetic field

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ND17-1-2023

Explanation

An exothermic reaction is a chemical reaction that releases energy in the form of light or heat

it is the opposite of an endothermic reaction

expressed in a chemical equation:

reactants --> protect + energy

exothermic reaction "Exo" means the release and "thermic" means heat

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ND17-1-2023

Explanation

A terrible, sudden accident: ایک خوفناک، اچانک حادثہ

disaster means: مصیبت

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ND2-2-2023

Explanation

Ozone, a form of oxygen, is a normal constituent of the earth's atmosphere.

Photocopiers create ozone through their "corona wires" that apply a charge to the paper so the ink will cling to it

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ND17-1-2023