Explanation

Bird flu is caused by a type of influenza A virus, often H5N1.

It affects birds and can occasionally infect humans.

Explanation

Ophthalmologist means a specialist in the branch of medicine concerned with the study and treatment of disorders and diseases of the eye.

Ophthalmologist means ماہر امراض چشم

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Explanation

Brittle materials are those that break easily under stress.

Explanation

The ozone layer lies in the stratosphere, approximately 15-40 kilometers (10-25 miles) above the Earth's surface.

The stratospheric ozone layer is Earth's “sunscreen”  protecting living things from too much ultraviolet radiation from the sun.

Oxygen layer in the atmosphere 

Ozone protects us from the harmful ultraviolet radiation of the sun.

Ozone formula: O3

The ozone layer is depleting: Air pollution

ND17-7-2023

Explanation

The formulas for converting between degree Celsius and degree Fahrenheit are:

scie

To find the temperature when both are equal, we use an old algebra trick and just set ºF = ºC and solve one of the equations.

°C = (°C * 9/5) + 32

°C – (°C * 9/5) = 32

-4/5 * °C = 32

°C = -32 * 5/4

°C = -40

°F = (°F * 9/5) + 32

°F – (°F * 9/5) = 32

-4/5 * °F = 32

°F = -32 * 5/4

°F = -40

So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees.

Explanation

Isaac Newton formulated the law of universal gravitation, explaining how gravity works.

He famously described gravity after observing an apple fall from a tree.

Explanation

Explanation

Explanation

Population density is the number of people living in a unit area of the earth's surface.

It is generally expressed as per square km.

The average density of the population in the whole world is 51 persons per square km.

Explanation

The lungs are located on either side of the breastbone in the chest cavity