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A thin uniform rectangular sign hangs vertically above the door of a shop. The sign is hinged to a stationary horizontal rod along its top edge. The mass of the sign is 2.40 kg and its vertical dimension is 50.0 cm. The sign is swinging without friction, becoming a tempting target for children armed with snowballs. The maximum angular displacement of the sign is 25.0degress on both sides of the vertical. At a moment when the sign is vertical and moving to the left, a snowball of mass 400 g, traveling horizontally with a velocity of 160 cm/s to the right, strikes perpendicularly the lower edge of the sign and sticks there. (a) Calculate the angular speed of the sign immediately before the impact. (b) Calculate its angular speed immediately after the impact. (c) The spattered sign will swing up through what maximum angle?
Explain about the wave-particle duality of light and matter. The wave-particle duality of light and matter Into 1690 year Christiaan Huygens theorized which light was compos
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Write down a short note on the discovery of neutron. Show the uses of radioisotopes.
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Dot Product A Easy demonstration of the relation among the dot product of 2 vectors and the angle among them. Move the slider to view the changes.
What is potential and kinetic energy?
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