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Two people are listening to the same music at the same distance.

asked Oct 17, 2017 in Physics by sonia (36.5k points)

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1 answer 273 views

What is a light pipe? Describe its uses.

asked Oct 18, 2017 in Physics by shamroz (41.5k points)

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1 answer 391 views

The breathing becomes rapid and deep after exercise. Why?

asked Oct 16, 2017 in English by sonia (36.5k points)

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Draw the ray diagram for image formation in human eye when object is placed at near point

asked Oct 18, 2017 in Physics by sonia (36.5k points)

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On which factor speed of water waves depends?

asked Oct 16, 2017 in Physics by sonia (36.5k points)

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Suppose you have a glass rod which becomes positively charged when you rub it with wood.

asked Oct 19, 2017 in Physics by sonia (36.5k points)

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In your own words, explain why light waves are refracted.

asked Oct 19, 2017 in Physics by shamroz (41.5k points)

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Describe how you would determine the nature of the charge on a body by using electroscope.

asked Oct 19, 2017 in Physics by sonia (36.5k points)

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What is meant by electrostatics or static electricity?.

asked Oct 19, 2017 in Physics by sonia (36.5k points)

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1 answer 237 views

How does a slide projector or movie projector work? Explain.

asked Oct 18, 2017 in Physics by shamroz (41.5k points)

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Why must the volume of a stereo in a room with wall-to-wall carpet be turned higher than in a room with a wooden floor?

asked Oct 17, 2017 in Physics by sonia (36.5k points)

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1 answer 235 views

What is a compound microscope? Describe its some features and uses.

asked Oct 18, 2017 in Physics by shamroz (41.5k points)

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What is prism? Describe the passage of light through.

asked Oct 18, 2017 in Physics by sonia (36.5k points)

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Explain Coulomb's law of electrostatics and write its mathematical form.

asked Oct 19, 2017 in Physics by sonia (36.5k points)

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1 answer 233 views

What is photograph enlarger? How does it work?

asked Oct 18, 2017 in Physics by shamroz (41.5k points)

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1 answer 230 views

Mention the magnifying powers of the following optical instruments

asked Oct 18, 2017 in Physics by shamroz (41.5k points)

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1 answer 1.2k views

Derive equilibrium constant expression for the synthesis of ammonia from nitrogen and hydrogen.

asked Sep 26, 2017 in Chemistry by shamroz (41.5k points)

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Why we take the principal focus of a concave mirror as real and a convex mirror as virtual?

asked Oct 17, 2017 in Physics by shamroz (41.5k points)

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What is the stimulus of breathing?

asked Oct 16, 2017 in English by shamroz (41.5k points)

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Define power of a lens and its unit

asked Oct 18, 2017 in Physics by sonia (36.5k points)

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