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Physics

Physics
When water freezes its density

Remains constant
Decreases
Increases
Becomes Zero

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Physics
The colours of stars depend on their

Atmospheric pressure
Radius
Temperature
Distance

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Physics
A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is

One
Zero
More than one
Less than one

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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
1.8 km, 0.15 km
3.3 km, 0.30 km

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Physics
When all the forces and torques are balanced in a mechanical body it is said to be in

Static
Equilibrium
None of these
Buoyancy

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

2.0958333333333
0.12847222222222
1.0479166666667
0.21041666666667

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