41. A six feet tall
lady wants to see her full image in a plane mirror. The minimum length of the
mirror will be 3 feet.
42. The principle
used in radar is the same as that of Sonar. In radar we use radio waves;
whereas in sonar we use Ultrasonic.
43. In a fission
nuclear reaction, a heavy nucleus breaks up into smaller nuclei whereas in
another nuclear reaction two or more than two possibly nuclei are fused to form
a heavy nucleus; this nuclear reaction is called Fusion nuclear reaction.
44. Parsec is a unit
of Distance.
45. German Silver is
an alloy of Cu + Ni.
46. The Continent
Antarctica lies at the South pole.
47. The temperature
of the dead body is temperature of the place where it is kept.
48. Lactometer is a
type of Hydrometer which is used to measure the specific gravity of Milk.
49. The deepest place
on earth is Mariana Trench.
50. Twinkling of
stars is caused by refraction of light.
51. Magnifying power
of a simple microscope can be increased by Increasing focal length of the
lens.
52. Bronze medal is
made up of metal Copper & Tin.
53. The countries
through which equator passes are Kenya and Malaysia.
54. A very important
practical application of properties of matter is hoeing or "godi"
practiced by the farmers. This property of matter is called Capillarity.
55. Clocks, which moves
with the velocities comparable with the velocity of light, run with zero
velocity.
56. Max Planck
received the noble prize in Physics in 1918 for his discovery of energy
quanta.
57. Humming bird
belongs to a category called Endotherm.
58. Radioactive
isotope of Uranium used in Nuclear Bomb is 92 U 238.
59. Woody raw
material of Poplar is used for the manufacture of paper pulp.
60. Rectified spirit
contains about 95% alcohol.
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