1.
Speed of Sound in Air?
Ans. 331 m/s.
2.
Red Colour has largest and
Blue colour has shortest?
Ans.
Wavelength.
3.
Logarithm tables were
invented by ?
Ans.
John Napier
4.
The frequency of which of
the following is the highest?
Ans.
Radio waves
5.
Radio waves travel with
almost the velocity of.
Ans.
light
6.
The distance between the
earth and the sun is smallest in the month of.
Ans.
January
7.
One metric ton is equal to.
Ans.
1000 kg, or 2204 pounds
8.
One square foot is equal
to144 sq inches and 1 meter is equal to 3.28 foot.One nautical mile is equal
to.
Ans.
6080
9.
Atmospheric pressure at sea
level is .
Ans.
760 mm.
10.
The acceleration caused by
gravity per second is.
Ans.
32 feet
11.
1 Inch is equal to...
Ans.
2.54 centimeters
12.
Silicon is called the………..
Ans.
Earth Maker.
13.
What does Angstrom measure?
Ans.
Speed of ships.
14.
The scientist who first
discovered that the earth revolves round the sun was…...
Ans.
Copernicus
15.
…………was invented by Howard
Alken.
Ans.
“Digital Computer”
16.
Wood is the least conducter
of.
Ans.
electricity
17.
Earth revolves around the
sun from?
Ans.
West to east
18.
The area between the Tropic
of Cancer and the Trpic of Capricorn, where the sun is vertically overhead at
some point of the year is called.
Ans.
The Torrid zone
19.
One horse power is equal
to…...
Ans.
746 watt.
20.
Which colour phosphorus
used in matches?
Ans.
Red
21.
Basic component of paper
is…...
Ans.
Wood
22.
The bar is a unit of
pressure equal to 100 kilopascals and roughly equal to the atmospheric pressure
on Earth at……..
Ans.
sea level
23.
Light year is the unit of
distance.It is the distance that light can travel in one year. A light year is
equal to………..
Ans.
9.46 trillion kilometers
24.
Cusec is unit of……….
Ans.
water flow
25.
Mirage is an example of
refraction of…………...
Ans.
Light
26.
Sound travels fastest
in…..........
Ans.
Glass
27.
The gravitational force on
the body is called……..
Ans.
as Weight
28.
Most astronomers believe
that origin of the Universe is………….
Ans.
Big Bang Theory
29.
A low area storm with high
winds rotating about a center of low atmospheric pressure is called.
Ans.
Cyclone
30.
The difference in the
duration of day and night increases as one move from Equator to………...
Ans.
poles
31.
Solar system was discovered
by……...
Ans.
Nicolaus Copernicus
32.
1sq cm is equal to how many
square mm?
Ans.
100
33.
1 milligram gold is equal
to how many milligrams?
Ans.
1000
34.
We are saved from
ultraviolet rays of sun through?
Ans.
Ozone Layer
35.
Heat is measured in the
unit?
Answer:
Joule
36.
One calorie equals?
Answer:
4.2 Joule
37.
Normal body temperature is?
Answer:
36.90 C or 98.40 F
38.
Instrument to measure
temperature is?
Answer:
Thermometer
39.
The temperature at which
solid changes to a liquid is called?
Answer:
Melting point of sold
40.
Lowest melting point has?
Answer:
Mercury (-38.80 C)
41.
Highest melting point has?
Answer:
Tungsten (34100 C)
42.
Change of liquid to gaseous
state is called?
Answer:
Evaporation
43.
The amount of heat required
to melt unit mass of substance?
Answer:
Heat of fusion
44.
The amount of water vapour
present in air is known as?
Answer:
Humidity
45.
Change from vapour to
liquid is called?
Answer:
Condensation
46.
The temperature at which
liquid solidifies is called?
Answer:
Freezing point
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