Ans. Glass is made of soda, lime, and sand.
2. What
is the device by which the amount of rain is measured?
Ans. The rain gauge measures the amount of rain.
3. Looking
at which bird man-made the radar
Ans. Man-made radar after seeing bats.
4. Which country was the first to set up
pharmacies?
Ans. The Arabs were the first to set up
pharmacies.
5. Who invented roll film and color
photography?
Ans. George East was an American inventor
and inventor of roll film and color photography.
6. What was the name of the world's first
manned spacecraft?
Ans. The world's first manned spacecraft was Apolo7.
7. How many people were onboard the world's first manned
space rocket?
Ans. The world's first manned spacecraft and space
rocket had three people on board.
8. How to identify the real hang and
what does it smell like?
Ans. When a real hang is set on fire, it burns
like a candle and smells like garlic.
9. Who invented the tape recorder?
Ans. The tape record was invented by Pau Lisen
in 1898 and belonged to Denmark.
10. Which company introduced the cassette?
Ans. The cassette was introduced by the Swedish
company Philips.
11. When were the telephone wires laid at sea?
Ans. At sea in 1956, telephone wires were
laid.
12. Who invented the photostat machine?
Ans. Chester Charlson invented the
photostat machine. And the first
photocopy was taken on October 22, 1929.
13. Who made the first video tape recorder?
Ans. The first videotape recorder was made by the American
company Amplix in 1956.
14. When did telephone calls through
communications planets begin?
Ans. Telephone calls through communications
satellites began in 1962.
15. Which country came up with the idea of a
fully electronic TV system?
Ans. The United Kingdom introduced the idea
of a fully electronic TV system in 1908.
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