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Physics

Physics
Which of the following cannot be used for making lenses?

Glass
Soil
Water
Plastic

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Physics
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?

2.2 km, 0.20 km
2.8 km, 0.25 km
3.3 km, 0.30 km
1.8 km, 0.15 km

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Physics
When a running car stops suddenly, the passengers tends to lean forward because of:

Inertia of motion
Inertia of rest
Centrifugal force
Gravitational force

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Physics
Sound waves do not show the phenomenon of

Interference
Refraction
Diffraction
Polarisation

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Physics
The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by

0.1 MeV
100 MeV
10 MeV
1 MeV

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Physics
What is colour of light related to ?

Quality
Velocity
Frequency
Amplitude

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