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Physics

Physics
What is colour of light related to ?

Quality
Velocity
Frequency
Amplitude

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Physics
Consider the following statements :1. There is no net moment on a body which is in equilibrium.2. The momentum of a body is always conserved.3. The kinetic energy of an object is always conserved.Which of the statements given above is/are correct?

1 only
2 and 3 only
1, 2 and 3
1 and 2 only

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Physics
Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface ?

Stratosphere
Exosphere
Mesosphere
Ionosphere

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Physics
The weight of a body acts through the centre of

Both (A) and (B)
Mass
Gravity
Buoyancy

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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?

4.33 diopters
-12.33 diopters
-4.33 diopters
12.33 diopters

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Physics
Super cooling stands for cooling of a liquid :

At freezing point
Above melting point
Below freezing point
At melting point

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