Explanation

Dry air from Earth's atmosphere contains 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and traces of hydrogen, helium, and other "noble" gases (by volume), but generally a variable amount of water vapor is also present, on average about 1% at sea level.

Explanation

• Fluorescent lamps consist of glass tubes filled with a mixture of argon and mercury vapor.
• Mercury vapour → produces ultraviolet (UV) light.
• Phosphor coating → converts UV into visible light.
• Argon gas → helps start and maintain the discharge.
• Electrodes → emit electrons.
• Ballast/choke → controls the current.

Explanation

Direct indirect after was use being.

Explanation

He rammed his truck into the back of the one in front means اس نے اپنے ٹرک کو سامنے والے کے پچھلے حصے میں ٹکرا دیا

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Explanation

Magnetism is a force that can attract (pull closer) or repel (push away) objects.

Explanation

Eugenics is the practice or advocacy of improving the human species by selectively mating people with specific desirable hereditary traits

Explanation

The first digital camera was invented by Steven Sasson, an engineer at Eastman Kodak, in 1975.

Sasson's camera used a monochrome Fairchild CCD image sensor.

It was the first self-contained electronic camera.

Explanation

Et cetera abbreviated to etc.,is a Latin expression that is used in English to mean "and other similar things", or "and so forth". 

Explanation

Et cetera abbreviated to etc.,is a Latin expression that is used in English to mean "and other similar things", or "and so forth". 

Explanation