Tag: Scientific Inventions

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Q. Why is a small space left at the joint between the two rails ?

Q. Why is a small space left at the joint between the two rails? A. Metals expand on heating and contract on cooling. A small...

Q. Explain why one leans forward while climbing a hill.

Q. Explain why one leans forward while climbing a hill. A. The person leans forward in order to keep himself in stable equilibrium. By leaning...

Q. Why is it more difficult to breathe on mountains than on plains ?

Q. Why is it more difficult to breathe on mountains than on plains? A. With higher altitudes, the pressure of air goes on decreasing. The...

Q. Why do a gram of weight and a pound of weight released simultaneously from the top of a tower reach the ground at...

Q. Why do a gram of weight and a pound of weight released simultaneously from the top of a tower reach the ground at...

Q. Why is cooking quicker in a pressure cooker ?

Q. Why is cooking quicker in a pressure cooker ? A. The boiling point of water (or any othe) dependr liquids upon the pressure on its surface....

Scientific Instruments

Altimeter is a special type of aneroid barometer, used in measuring altitudes. Ammeter is an instrument to measure the strength of an electric current. Amplifier is...

Scientific measures 2

Bar: Unit of atmospheric pressure; one bar is equal to a pressure of 106 dynes per sq cm. Calorie : Unit of heat. It is...

scientific measures

Candela (unit of luminous intensity; Symbol cd), defined as the intensity in a given direction of a source emitting radiation of frequency 540 x...

GENERAL SCIENCE Abbreviations

Chemotherapy: The treatment of disease by using chemical substances.Chronobiology: The study of the duration of life.Chronology: The science ofarranging time in periods and ascertaining...

GENERAL SCIENCE ★Inventions And Discoveries ★

 ★Inventions And Discoveries ★Astrology: The ancient art (now mostly termed a pseudo-science) of predicting the course of human destinies with the help of indications...

How does a wireless mouse work ?

A mouse is a very important peripheral device in a computer which is used to move the cursor on the computer screen. It has...

Why do all planets have a spherical shape?

Why do all planets have a spherical shape? The recognized planets of the solar system are large bodies with a significant mass. All particles of...