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A wheel rotating with a constant angular acceleration turns through20 revolutions during a 3 s time interval. Its angularvelocity at the end of this interval is 12 rad / s. What isthe angular acceleration of the wheel? Note that the initialangular velocity is NOT zero.
A spherical balloon has a radius of 12.5 m, and is filled with helium. How large a cargo can it lift, assuming that the skin and structure of the balloon have a mass of 1200 kg? avoid the bouyant force on the cargo volume itself.
A 0.60kg sphere rotates around a vertical shaft supported by 2 strings. If the tension in the upper string is 18N, calculate the tension in the lower string
A coil is wrapped with 309 turns of wire on the perimeter of a circular frame (of radius 50cm). Each turn has same area, equal to that of the frame.
You want to examine the hairy details of your favorite pet caterpillar, using a lens of focal length 8.9 cm that you just happen to have around. what angular magnification do you achieve
consider a hot-air balloon. the deflated balloon gondola and 2 passengers have a combined mass of 315 kg. when inflated
Imagine a very long, uniform wire that has a linear mass density of 0 . 0012 kg / m, What is the magnitude of the current in the wire that keeps it levitated just above the ground
A solid cylinder of mass 148.7 kg and diameter 0.72m has mounted to rotate around its axis, the cylinder has an initial angular velocity of wi, and the mass is 26m below the cylinder
3 30 pound kegs are stacked on a dolley (2 on top of each other and the third on top of both of them opposite of the dolley back (they form kind of a triangle)). Calculate the force the dolley wheel exerts ON the floor
A parallel plate capacitor has plates of area A and seperation of d and is charged to a potential difference of V.Derive expressions for the new potential difference
question1an electron accelerated from rest through a voltage of 400 v enters a region of constant magnetic field. if
The ultracentrifuge is an important tool for separating and analyzing proteins. Because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite si..
what is the excess charge on a conducting sphere of radius r 0.36 m if the potential of the sphere is 1050 v and v 0
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