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Q. A mass of 1.61kg stretches a vertical spring 0.31m. If the spring is stretched an additional 0.132m and released, how long does it take to reach (new) equilibrium position again?

Q. 1) A 100 W lightbulb produces 4.0 W of visible light. (The other 95W are dissipated as heat and infrared radiation.) What is the light intensity on a wall 3 m away from the lightbulb?
2)A krypton laser produces a cylindrical red laser beam 3 mm in diameter with 4 W of power. What is the light intensity on a wall 2.5 m away from the laser?

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  • Category:- Physics
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