Explanation

The mercury barometer is the oldest type of barometer.

It was invented by the Italian physicist Evangelista Torricelli in 1643.

Explanation

Ophthalmology is a branch of medical science dealing with the structure, functions, and diseases of the eye.

Ophthalmology means امراض چشم

Explanation

Over the first 20 years after entering the atmosphere, methane has more than 80 times the warming power of carbon dioxide.

Despite the fact that CO2 has a longer-lasting effect, methane accelerates warming in the short term.

Explanation

On May 4th, 1984 four papers by Robert C. Gallo's group were published in Science describing a new human retrovirus virus as the probable cause of AIDS.

Explanation

A biography, or simply a bio, is a detailed description of a person's life.

It involves more than just basic facts like education, work, relationships, and death

Explanation

An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space.

AGM 25-12-2022

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RY12-02-23

Explanation

-196 degrees C is the temperature of liquid nitrogen.

Nitrogen is a gas at room temperature.

Liquid nitrogen has a boiling point at O = -196°C approximately, at atmospheric pressure.

 It is a colourless, mobile liquid whose viscosity is about one-tenth that of acetone.

Liquid nitrogen is widely used as a coolant.

Explanation

The most important risk factor for lung cancer is tobacco smoking.

Experts estimate 85 to 90% of lung cancers are due to smoking.

Explanation

Reverse osmosis is a water purification process

that uses a partially permeable membrane to remove ions,

unwanted molecules and larger particles from drinking water.

Explanation