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Physics

Physics
Which determines the frequency of a sound wave?

Speed
Source
Medium
Amplitude

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Physics
Which one of the following is the value of one nanometer?

10-3 cm
10-7 cm
10-4 cm
10-6 cm

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Physics
If a body moves with a constant speed in a circle

No work is done on it
No force acts on it
Its velocity remains constant
No acceleration is produced in it

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Physics
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

-12.33 diopters
-4.33 diopters
12.33 diopters
4.33 diopters

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Physics
Kepler's law of planetary motion states that the square of the time period is proportional to the

Fourth power of the semi-major axis
Semi-major axis
Cube of the semi-major axis
Square of the semi-major axis

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Physics
The SI unit of luminous emittance is :

Candela
Lumen
Lux
Lumen second

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