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An electric fan is turned off, and its angular velocity decreases uniformly from 400 rev/min to 220 rev/min in 5.00 s. A) Find the angular acceleration in rev/s^2. B) Find the number of revolutions made by the motor in the 5.00 s interval. C) How many more seconds are required for the fan to come to rest if the angular acceleration remains constant at the value calculated in part A?
A proton is captured by an oxygen-16 atom which in turns emits a deuteron. find the mass number of the product isotope
Two charges q = +8.0 µC are fixed a distance d = 9.0 cm apart. With V = 0 at infinity, what is the electric potential at point C
a ball is thrown vertically upward with a speed of 25m/s, how long does it take to reach its highest point
A 6.00m long string sustains a three-loop standing wave pattern as shown. The wave speed is 2.00 x 10^2 m/s. What is the frequency of vibration
The objective of a certain lens system is a double convex lens of 10.2 cm focal length; how far is the image from the eyepiece
what is the energy now stored if the capacitor was disconnected from the potential source before the separation of the plates was changed? What is the energy now stored if the capacitor remained connected to the potential source while the separation ..
A bicycle wheel is rotating at 45 when the cyclist begins to pedal harder, giving the wheel a constant angular acceleration of 0.42.
A conducting spherical shell with inner radius a and outer radius b has a positive charg Q located at its center. derive expressions for the electric field magnitude in terms of the distance r from the center
An electric trimmer blade has rotational inertia 1.85×10^-4 kg*m^2. How much work was done to accelerate the blade
a child makes a ramp to push his toy dump truck up to his sand box.If he uses 5 newtons of force to push his 12 newton truck up the ramp
A copper cylinder and a brass cylinder are stacked end to end, as in the drawing. Find the amount by which the length of the stack decreases
Calculate the maximum current density in a lead wire of diameter 4 mm at a temperature of 4.2K if the wire is to remain superconducting. The relevant values for lead are Tc= 7.19k and Bc =6.39 x104 A/m . (note that the magnetic field in the wire is g..
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