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Q1. A small statue in the shape of a falcon is painted black and has a weight of 24.1 N. The owner of the statue claims it is made of solid gold. What time the statue is completely submerged in a container brimful of water, the weight of the water that spills over the top and into a bucket is 1.25 N. Find the density of metal. Is the density consistent with the claim that the falcon is solid gold?
Q2. A 55.0 kg girl weighs herself by standing on a scale in an elevator.
a)What is the force exerted by the scale when the elevator is descending at the constant speed of 10 m/s?
b)What is the force exerted by the scale if an elevator is accelerating downward with an acceleration of 2.7 m/s2
c)If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.7 m/s2, what is a force exerted by the scale?
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
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