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Why does it feel good when a girl crosses her legs? A particle moves so that its position in m. as a function of time in sec is r equals i plus 4Tsqj plus tk. write expressions for a. its velocity and b. its acceleration as functions of time? How does sunlight appear through a spectroscope? Which position of the object will produce an image of the same size as the object? Difference between electrical conductors and electrical insulators? How does air resistance affect fallig objects? Is there a wavelength for electricity? Can waves move objects over a distance? How do you solve a 200-lb crate lies on the floor. The coefficient of static friction between the crate and the floor is 0.60. What is the minimum force required to start the crate sliding? Do sound waves bend around objects? Can anything have an acceleration in the opposite diretion to its velocity? What do you call something that makes something move or cause it to stop? What is the voltage at the location of a 0.0001-Coulomb charge that has an electric potential energy of 0.5 joules? What factors affect strength of magnetic and electric forces? What is a ramp that gives you access to an expressway? What is the potential energy of a 2kg book sitting on a shelf 2 meters above the ground? Why person jumping out of a speeding train fall forward? How much force does a ball exert on the bat if it is hit with a force of 8 newtons? What are materials that allow light to pass through them? Why does a suction cup stick to a window?