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A hoist has a winding drum 0.9 m effective diameter and a radius of gyration of 0.35 m, the mass of the drum being 100 kg. A load of 320 kg is to beraised 36 m, the mass of the lifting rope being 1 kgim. If the acceleration is1.8 mis2 until a constant velocity of 6 mis is reached, find the power necessary just at the end of the acceleration.
Five moles of an ideal gas expand isothermally at 100 degrees Celsius to five times its initial volume. Find the heat flow into the system.
A scientist is running at speed, u, toward a large, smooth wall while holding a tuning fork that vibrates at frequency, f. what is the beat frequency she hears
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
A very long uniform line of charge has charge per unit length 4.80 microC/m and is parallel to the x-axis at y = 0.400m. What is the net electric field (magnitude and direction) at the following points on the y-axis: y=0.200m and y=0.600m
Determine the resistance R of the wire. Determine the resistivity If the drift speed is 1.9 x 10-5 m/s, determine the number n of free electrons per unit volume.
A shift of one fringe in the Michelson-Morley experiment corresponds to a change in the round-trip travel time along one arm of the interferometer by one period of vibration of light, what velocity through the ether would be deduced frame a shift o..
Three uniform spheres are located at the corners of an equilateral triangle. find the magnitude of the initial acceleration of the third sphere
A constant force changes the speed of a 76 kilogram sprinter from 3.0 m/s to 4.0 m/s in 0.45 second. Find the magnitude of the acceleration of the sprinter
Water skiers often ride to one side of the center line of a boat, as shown in Figure 7-16. In this case, the ski boat is traveling at15 m/s and the tension in the rope is 85N. If the boat does 3500 J of work on the skier in 42.8 m, what is the angle ..
Calculate the pressure exerted on the skin by an acupuncture needle of radius 0.100 mm applied with a force of 4.80 N
A bird watcher meanders during the woods, walking 0.501 km due east, 0.775 km due south, and 2.02 km in a direction 37.6° north of west. The time required for this trip is 2.59 hr. decide the magnitude (in kilometres) of the bird watcher's displaceme..
The person;s gold wedding ring is stuck on his finger, and he must remove it. Find how much must the temperature of the ring be increased for it to slide past the knuckle
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