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Q1. A box of mass 32 kg is at rest on a horizontal frictionless surface. A constant horizontal force then acts on the box, and accelerates it to the right. It is observed that it takes the box 6.5 seconds to travel 48 meters. What is the magnitude of force?

Q2. A physics instructor wants to produce a double-slit interference pattern large enough for her class to see. For the size of room, she decides that the distance between successive bright fringes on the screen must be at least 2.58 cm. If the slits have a separation d = 0.0270 mm, what is minimum distance from the slits to the screen when 580 nm light is used?

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