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a) Estimate Earth's rotational inertia, assuming it to be a uniform solid sphere
b) What torque applied to Earth would cause the length of the day to change by 1 second every century?
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Question: A rectangular wooden block of weight W floats with exactly one-half of its volume below the waterline. The wooden block is removed from the water bath and placed in an unknown liquid. In this liquid, only one-t ...
Question: A semicircle of radius a is in the first and second quadrants, with the center of curvature at the origin. Positive charge +Q is distributed uniformly around the left half of the semicircle, and negative charge ...
Question: A picture window has dimensions of 1.40 m x 2.50m and is made of glass 6.00mm thick. On a winter day, the outside temperature is -15.0?C , while the inside temperature is a comfortable 21.0°C . Part A: At what ...
Question: A textbook of mass 2.09kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.120m , to a hanging book with mass 2.96kg . The system is released fro ...
Problem: A block oscillating on a spring has a maximum speed of 20cm/s. What will be the block's maximum speed if its totalenergy is doubled? Explain. (in its simplest form of physics,please) The response must be typed, ...
An inflatable life raft is released from an air plane at 500 m altitude, in level flight, with an air speed of 20 m/s in the horizontal direction. How long before the raft strikes the water? How far from the release poin ...
Question: Suppose that there are two goods available to the consumer-pens and pencils. Suppose that the price of a pen is $2.00 while the price of a pencil is $0.50. If we measure the quantity of pens on the horizontal a ...
Question: Standing waves on a wire are described by y(x,t)=(ASWsinkx)sin?t, with ASW = 3.00mm , ? = 975rad/s , and k = 0.790?rad/m . The left end of the wire is at x = 0. Part A: At what distances from the left end are t ...
Question: The position of a mass oscillating on a spring is given by x = (6.6cm) cos[2Ït/(0.69s)]. Part A: What is the frequency of this motion? Express your answer using two significant figures. Part B: When is the mas ...
Question: The surface charge density on an infinite charged plane is - 1.70 x 10^-6 C/m^2 . A proton is shot straight away from the plane at 2.20 x 10^6m/s. How far does the proton travel before reaching it's turning poi ...
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