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Physics

Physics
Least audible sound for most of the human ear is :

0.005 µ bar
5.0 µ bar
0.0002 µ bar
10.0 µ bar

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Physics
The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?

1.0479166666667
0.12847222222222
0.21041666666667
2.0958333333333

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Physics
In hydro power station, the motion produced in turbines is due to

Flow of water
Burning of coal
Burning of diesel
Production of steam

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Physics
A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to

Inertia of motion
Outward pull on him
Change in acceleration
Change in momentum

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Physics
The moment of inertia of a body does not depend upon its

Axis of rotation
Angular velocity
Distribution of mass
Form of mass

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Physics
The oldest type of energy known to man is

Wind power
Geothermal energy
Tidal energy
Solar power

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