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A solid cylindrical disk has a radius of 0.15 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 45 N force is applied tangentially to the disk,perpendicular to the radius, the disk acquires an angular acceleration of 120 rad/s2. What is the mass of the disk?
a family wishes to purchase a heat pump for their home. The get-it-cheap co. sells a heat pump that has an operating performance 38% of the coefficient of performance of an ideal Carnot heat pump. Compute the overall coefficient of performance for ..
a 6.0 cm diameter horizontal pipe gradually narrows to 4.5 cm. When water flows through the pipe at a certain rate, What is the volume rate of flow
A Lucite planoconvex lens has one flat surface and one with R= 16.3cm. What are the locations of the red and yellow images formed by the lens
The work needed to remove an electron from the surface of sodium is 2.3 eV. How big maximal velocity will have electrons if the surface of sodium will be illuminated with ultraviolet light wave length
The inner sphere has radius 15.0 cm and the capacitance is 116 pF. If the potential difference between the two spheres is 220 V, illustrate what is the magnitude of charge on each sphere?
One end of a brass bar is maintained at 305 oC, while the other end is kept at a constant, but lower, temperature. What is the temperature of the bar at a point 0.129 m from the hot end
Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.5 cm-3, and their speed is 657 km/s. Find the current density of these protons
A rectangular coil of wire with an area of 0.218 m2 is situated in a constant magnetic field whose magnitude is 0.450 T, What is the flux through the surface
In tae-kwon-do, a hand is slammed down onto a target at a speed of 13 m/s and comes to a stop during the 7.0 ms collision. What are the magnitudes of the impulse
A fuse in an electric circuit is a wire that is designed to melt, and thereby open the circuit, if the current exceeds a predetermined value. What diameter of cylindrical wire should be used to make a fuse
Calculate the maximum allowable force that can be applied to stop a 1000 kg vehicle if the maximum allowable acceleration is 2.5 g.
a horizontal force of 50 n is applied for 10 s on a box of mass 20kg placed on a friction-less horizontal table .
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