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In the visible spectrum, the colour having the shortest wavelength is

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What is the approximate value of speed of sound in air? The force of gravity on an object is called. Which of these travels in glass with minimum velocity? An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil, then Applying a force of 5 newtons on a wooden plank with mass m 1 kg, it accelerates with an acceleration of 10 ms -2 . Another plank of mass m 2 kg accelerates with an acceleration of 20 ms -2 when the same force is applied. If both the planks are tied with each other and the same force is applied on them, what will be the acceleration?