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A fire helicopter carries a 660-kg bucket of water at the end of a 20.0-m long cable. Flying back from a fire at a constant speed of 40.0 m/s, the cable makes an angle of 38.0° with respect to the vertical. Determine the force exerted by air resistance on the bucket.
A 35-turn circular coil of wire has a diameter of 0.57 m. find the strength of the average emf generated in the coil
A person consumes a meal containing 17 kcal. What is the power this meal produces if it is to be "burned off" due to exercise in 6 hours
question1three point charges are in order on a line. charge 3 5.00 nc and is at the origin. charge 2 -2.50 nc and is
If a cat repeatedly rubs against your cotton slacks on a dry day, the charge transfer between the cat hair and the cotton can leave you with an excess charge of -2.00 ?C. How many electrons are transferred between you and the cat
The mass of a string is 1.00 10-3 kg, and it is stretched so the tension in it is 120 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string?
The total translational kinetic energy of the molecules of a sample of gas at 421 k is 3.95x10^4j. Find the average translational kinetic energy of a single molecule
A thin metallic spherical shell of radius 0.377 m has a total charge of 5.03 × 10-6 C placed on it, What is the electric field at a distance of 0.785 m from the center of the spherical shell
A boat whose speed in still water is 8 m/s, is directed across a river with a current of 6.0m/s. What is the speed of the boat as it crosses the river?
a box rests on a frozen pond which serves as a frictionless horizontal surface. if a fisherman applies a horizontal
Two small charges with a mass of 1.0 g each are connected by 2.0-cm-long insulating rod of negligible mass. Obtain the moment of inertia around the center of mass
Two converging lenses having focal lengths of f1 = 10.9 cm and f2 = 20.0 cm are placed d = 50.0 cm apart. What is the overall magnification of the system
A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred? The elementary charge is 1.60218 × 10?19 C
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