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Why are sound waves called mechanical waves?
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Describe how light is refracted through lenses?
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Describe the use and working of endoscope.
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Why ultrasound is useful in medical field.
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What is the stimulus of breathing?
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Describe some uses of lenses.
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What do you mean by convex and concave lens. What are their different types?
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State the conditions for total internal reflection.
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What is the effect of medium on the speed of sound.
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What is meant by echo? Can we explain how does this happen?
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Do the magnitude of angle of incidence and angle of refraction equal?
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How does a convex tens or converging tens forms a virtual image of a real object?
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Define mirror formula. Also write its equation.
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Define the following terms:
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What do you mean regular and irregular reflection of light?
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Show that motion of a simple pendulum is SHM.
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How can noise pollution be reduced?
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