Which is heavier the land mass or the sea?
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Explain how do you find the refractive index of a liquid by using total internal reflection?
For projectiles fired at identical speeds but various angles from the ground, neglecting air resistance and the curvature of the earth, at what angle will the maximumhorizontal distance be attained?
How does a sailor find his longitude ?
Why gave we to put back the clock continually, when we travel round the world west-wards ?
Explain how does the elevation and air pressure affect the boiling point of water?
Explain what is the opaque?
What is Oxidation ?
What is Refraction ?
Why does a barometer read higher at Bombay than at Simla ?
Explain Transparent body ?
What is curvilinear motion?
Explain the Fluorescence ?