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Physics

Physics
Which of the following is the unit of Astronomical Distance ?

Parsec
Metre/sec
Para/sec
Sec

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Physics
One watt-hour is equivalent to

6.3 x 10-7 J
6.3 x 103 J
3.6 x 103 J
3.6 x 10-3 J

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Physics
________ states that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done by the system.

First law of thermodynamics
Faraday's Law
Hooke's Law
The coulomb's law

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Physics
Parabolic mirrors are used in

Driving mirrors
Dentists mirros
Shaving mirros
Car headlights

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Physics
A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because

None of these
Special mechanisms are present in parachute
Stone is heavier than parachute
A parachute has a larger surface area and air resistance is more

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Physics
Refractive Index of glass with respect to water is

44082
43924
43864
44052

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