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Find an angular speed of a skater.
A 60.0 kg skater begins a spin with the angular speed of 6.00 rad/s. By changing the position of her arms, the skater decreases her moment of inertia by 50%. What is the skater's final angular speed?
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Several thin sheets of naphthalene, 0.25 cm thick and 10 cm square, are arranged parallel to each other with their centers at 1-cm intervals. Air at 273 K and 1:013 × 10 5 Pa enters this sandwich arrangement with a bulk ...
1. How many intrinsic electrons and holes are there in a thermal de Broglie cube at 300K in Si corresponding to an energy equal to k B T? What is the thermal fluctuation in carrier density In this cube? Can the intrinsic ...
At any time, t, a population, P(t), is growing at a rate proportional to the population at that moment. (a) Using derivatives, write an equation representing the growth of the population. Let k be the constant of proport ...
1. What is the significance and physics error when V = V bi which makes X pn =0 and C d =∞? 2. Show mathematically that the majority carrier storage capacitances in the two QNL's of the p/n junction are already include ...
Air pressure at sea level is 30 inches of mercury. At an altitude of h feet above sea level, the air pressure, P, in inches of mercury, is given by (a) Sketch a graph of P against h. (b) Find the equation of the tangent ...
Dry air, flowing at a velocity of 1.5 m/s, enters a 6-mlong, 0.15-m-diameter tube at 310 K and 1:013 × 10 5 Pa. The inner surface of the tube is lined with a felt material (diameter-to rough ness ratio, D/e, of 10,000) ...
A large punch bowl holds 3.45kg of lemonade (which is essentially water) at 20.0°C. A 0.33-kg ice cube at-10.2°C is placed in the lemonade. What is the final temperature of the system, and the amount of ice (if any) rema ...
Show that low-density generator-matrix codes are bad. A family of low-density generator-matrix codes is defined by two parameters j, k, which are the column weight and row weight of all rows and columns respectively of G ...
1. Why can heavy nuclei with odd numbers of neutrons be induced to fission with thermal neutrons, whereas those with even numbers of neutrons require more energy input to induce fission? 2. Why is a conventional fission ...
For the function shown in Figure 2.9, at what labeled points is the slope of the graph positive? Negative? At which labeled point does the graph have the greatest (i.e., most positive) slope? The least slope (i.e., negat ...
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