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A 2.03 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.462 and the coefficient of kinetic friction is 0.251. How much force is needed to begin moving the book? How much force is needed to keep the book moving at constant speed once it begins moving?
Ricardo, mass 80 kilogram, and Carmelita, who is lighter, are enjoying Lake Merced at dusk in a 30 kilogram canoe. determine Carmelita mass
A hot-air balloon is sinking toward the ground at a speed of 3.05 m/s, when the pilot drops a couple of sandbags overboard. How far did the balloon fall during that time
A dentist uses a mirror to examine a tooth. The tooth is 1.01 cm in front of the mirror, and the image is formed 10.9 cm behind the mirror. Determine the mirror's radius of curvature
A wide rectangular channel discharges 1.6 m3/sec per unit width. The slope is 0.001 and the manning's coefficient is 0.015. At a certain point the water depth is 0.75m. How far downstream will it be 0.73m. Use V.T.
In the sun, suppose the value of E (energy production per second per gram) drops to 1% of its central value at r/R = .02, which can be taken as the outer boundary of the solar core. Assume E==pT^4 where p is density and T is temperature. You have thi..
A charged object has a potential of 40 V at a distance of 3 m. If the distance is increased to 42 m, then what will be the new potential
the index of refraction for red light in water is 1.331 and that for blue light is 1.340. a ray of white light enters
A bullet with mass m = 5.21 g is moving horizontally with a speed v = 373 m/s when it strikes a block of hardened steel with mass M = 14.8 kg, What was the change in kinetic energy (J) of the bullet
A parallel-plate air capacitor is made from two plates 0.205m square, spaced 0.830cm apart. It is connected to a 120 V battery. What is the energy stored in the capacitor
Starting with an initial speed of 5.47 m/s at a height of 0.250 m, a 1.52-kg ball swings downward and strikes a 4.83-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1...
Two identical cars (m = 1350 kg) are traveling at the same speed of 18.9 m/s. What is the magnitude of the total momentum of the two cars
Two organ pipes, open at one end but closed at the other, are each 1.27m long. One is now lengthened by 2.00cm. Find the frequency of the beat they produce when playing together in their fundamental.
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