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A fire helicopter carries a 649 kg bucket of water at the end of a 18.7 m long cable. Flying back from a fire at a constant speed of 44.2 m/s, the cable makes an angle of 31.5o with respect to the vertical. Determine the force of air resistance on the bucket.
A child playing tee ball hits a stationary 60g ball with a 220g bat swinging initially at 4.0m/s, What's the bat's post-impact speed
A mass of 9.30 kg is suspended from a 1.45 m long string. It revolves in a horizontal circle, Calculate the angle between the string and the vertical
A sonar echo returns to a submarine 1.40 s after being emitted. What is the distance to the object creating the echo
A force of 100 N is applied to a 50kg mass in the direction of motion for a distance of 6.0m, how much work is done by the varying force
A man sitting in a bosun's chair that dangles from a massless rope, which runs over a massless, frictionless pulley and back down to the man's hand. The combined mass of the man and chair is 86 kg. With what force magnitude should the man pull on ..
A 20.33 gram ice cube at -8.87 degrees celsius is placed in an aluminum cup whose initial temperature is 182.02 C. What is the mass in grams of the cup
A light wave has a 660nm wavelength in air. Its wavelength in a transparent solid is 440nm. What is the speed of light in this solid
A lens with a focal length of 25 is placed 40 in front of a lens with a focal length of 5.0. How far from the second lens is the final image of an object infinitely far from the first lens? Is the image in part a in front of or behind the second l..
A hill that has a 32.1% grade is one that rises 32.1 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal
A solid disk of mass M and radius R is pivoted so that it can rotate about its center. The disk is initially at rest. A ball of mass m and speed v travels along a path tangential to the rim of the disk.
Two wires are identical, except that one is aluminum and one is nichrome. The aluminum wire has a resistance of 0.16 . What is the resistance of the nichrome wire
you apply a potential difference of 4.5 volts between the ends of a wire that is 2.5 m in length and .654mm in radius. What length of nichrome wire will you use
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