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A uniform disc with radius 0.45m, initially at rest, rotates about its central vertical axis with a constant angular acceleration of 2.2 rad/s^2 as it undergoes 3.5 revolutions.
1. Compute the final angular velocity of the disc
2. If the mass of the disc is 2.9kg. Compute its final angular momentum
You are a blacksmith and have been working with 19.3 kilogram of steel. When you are finished shaping it, the steel is at a temperature of 231°C. Find how much of this water is converted to steam
Much of the material making up Saturn's rings is in the form of tiny dust grains having radii on the order of 10-6 m. These grains are located in a region containing a dilute ionized gas, and they pick up excess electrons. As an approximation, sup..
A car is driven 215 kilometer west and then 85 kilometer southwest. Determine the displacement of the car from the point of origin (magnitude and direction)
A muon formed high in Earth's atmosphere travels at speed v = 0.92c for a distance of 4.3 km before it decays into an electron, a neutrino, How far does the muon travel
The loaded cab of an elevator has a mass of 2.8 x 10^3 kg and moves 214 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab.
Two ice skaters, Daniel (mass 63.1 kg ) and Rebecca (mass 45.9 kg ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, What is the direction of Daniel's velocity after the collision
A box of mass 5.4 kg is accelerated from rest by a force across a floor at a rate of 2.0 m/s2 for 9.0 s. Find the net work done on the box
A 2.30 cm diameter tungsten sphere is heated to a temperature of 2000 degree C. At this temperature tungsten radiates only 30% of the energy radiated by a blackbody of the same size and temperature.
An object with a mass of m = 4.9 kg is attached to the free end of a light string wrapped around a reel of radius R = 0.265 m and mass of M = 3.00 kg. Determine the magnitude of the acceleration of the object
A source vibrating at constant frequency generates a sinusoidal wave on a string under constant tension. by what factor does the amplitude change
a ball is launched into the air at an angle of 60 above the horizontal with a speed of 21.0 ms. a what are the x and y
Calculate the focal length required of glasses to be worn, A pair of eyeglasses are designed to allow a person with a near-point distance of 2.52 m to read a road sign at a distance of 25.2 m.
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