1. A convex lens of power 2D is suspended horizontally over the ground. A ball is projected upwards with some initial velocity. At the point of release of the ball the magnification produced is +2. 5 seconds later magnification changes to +5. Calculate the initial velocity.
2. Which waves posses the maximum energy?
3. What is mho?
4. A person is standing in a friction less room. He wants to move a distance of 100m. How can he do this?
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