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A wheel free to rotate about its axis that is not frictionless is initially at rest. A constant external torque of +52 N·m is applied to the wheel for 15 s, giving the wheel anangular velocity of +520 rev/min. The external torque is then removed, andthe wheel comes to rest 120 s later. (Include the sign in your answers.
a) Find the moment of inertia of the wheel.
b) Find the frictional torque, which is assumed to be constant.
A 0.2kg toy car rolls down ramp. If the car started from rest at a height of 0.30m, At what speed do the two cars move after the collision
The magnetic field of the brain has been measured to be approximately 3.0 x 10^-12 T. Although the currents that cause this field are quite complicated, we can get a rough estimate of their size by modeling them as a single circular current loop 1..
q1. charge of uniform density 80 ncm3 is distributed throughout a hollow cylinder region formed by two coaxial
Zinc has a density of 7.14 g/cm3, and the mass of a zinc atom is 1.09 10-25 kg. What is the distance between the centers of adjacent atoms
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, Determine the rotation rate, in revolutions per second, required to give the astronaut a centripetal acceleration of 19.8g
A 2.50-kg Pendulum is attatched to a string 11.4m stringis pulled aside until it is.386m above its lowest position and released. The pendulum is designed to emit sound waves at a frequency of 440 Hz; However, as it swings toward and away from an o..
A lens for a 35mm- camera has a focal length given by = 51mm, What is the magnification of the image on the film
A point charge of 6.1 µC is at the center of a cubical Gaussian surface 60 cm on an edge. What is the net electric flux through the surface
There are four charges, each with a magnitude of 2.0μC. Two are positive and two are negative. The charges are fixedto the corners of a 0.30 m square, one to a corner, in such a waythat the net force on any charge is directed toward the center oft..
The mass of a gas molecule can be computed from its specific heat at constant volume, cv. Take cv = 0.023 cal/g°C for xenon and calculate the mass of a xenon atom. (kg)
An object is placed to the left of a convex lens and on the optical axis. evaluate the magnification of the image formed by the lens
An electric toaster operating on 110.8 volts draws a current of 5 amperes. What is the resistance of the toaster
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