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A hunter who is a bit of a braggart claims that, from a distance of 1.5 km, he can selectively shoot either of two squirrels who are sitting 14 cm apart on the same branch of a tree. What's more, he claims that he can do this without the aid of a telescopic sight on his rifle. Determine the diameter of the pupils of his eyes that would be required for him to be able to resolve the squirrels as separate objects. In this calculation use wavelength of 498 nm (in vacuum) for the light.
An 85.1 kg base runner begins his slide into second base while moving at a speed of 5.9 m/s. The coefficient of kinetic friction between his clothes and ground is 0.68. He slides so that he comes to rest just as he reaches the base.
A capacitor is made from two hollow, coaxial, iron cylinders, one inside the other. The inner cylinder is negatively charged and the outer is positively charged; the magnitude of the charge on each is 10.0pCpC .
A rod of length L is hinged at one end. The moment of inertia as the rod rotates around that hinge is ML2/3. Suppose a 2.00-m rod with a mass of 3.00 kg is hinged at one end and is held in a horizontal position. The rod is released as the free end is..
A 3.80-mm-wide bolt is viewed with a9.30-cm-focal-length lens. A normal eye views the image at its near point. Calculate the angular magnification
Two children, with masses 35kg (on the left) and 44kg (on the right), sit at opposite ends of a 3.9mlong seesaw with mass 22kg, With the seesaw horizontal, find the net torque on the seesaw
A football is punted with an initial velocity of 28.7 m/s and an initial angle of 54.1o. What is its hang time
A weather balloon filled with helium gas has a volume of 279 m3, What is the new volume of the balloon
q1. a stone is dropped into a deep canyon and is heard to strike the base 6.8 s after release. how deep is the canyon?
Two particles of charge Q(-L,0) and nQ(αL,0) where n = 10. When a third charge is placed at the origin, it is found that the force on it is zero. Find out α.
A copper-constantan thermocouple generates a voltage of 4.55 10-3 volts when the temperature of the hot junction is 103.4° C, what is the temperature of the hot junction when the voltage is 1.94 10-3 volts
A cat is being chased by a dog. Both are running in a straight line at constant speeds. How fast did the cat run
A properly motivated kangaroo can jump over an object. what is the velocity of the kangaroo, just when it returns to the ground
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