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An electric motor can accelerate a Ferris wheel of moment of inertia I = 18500kg·m2 from rest to 10.1rev/min in 12.0s. When the motor is turned off, friction causes the wheel to slow down from 10.1 to 8.1 rev/min in 10.0s.
1) Decide the torque generated by the motor to bring the wheel to 10.1 rev/min.
2) Decide the power that would be needed to maintain this rotational speed.
A gas cylinder holds 0.22 mol of O2 at 187°C and a pressure of 3.6 atm. The gas expands adiabatically until the pressure is halved. What is the final temperature? What is the final volume?
a vertical straight wire carrying an upward 28 -a current exerts an attractive force per unit length of 6.710-4 nm on a
If a 200 N force F1 is applied to the piston with the 4 cm diameter, Calculate the magnitude of the force F2 that can be resisted by the piston with the 10 cm diameter? Ignore the weights of the pistons.
A motorboat is pointed due south, and its motor gives the boat a constant speed of 5.00 m/s through still water. Find the magnitude and direction of the boat's total velocity
question consider two straight conductors of length 1.1 m carrying current of 24 a and 12 a respectively. if they are
The last stage of a rocket is traveling at a speed of 7800 m/s. This last stage is made up of two parts that are clamped together, namely, a rocket case with a mass of300.0 kg and a payload capsule by a mass of 220.0 kg.
A second baseman tosses the ball to first baseman, which catches it at the same level from which it was thrown. The throw is made with an initial speed of 15 m/s at an angle of 38.0^circ above the horizontal. What is the horizontal component of ba..
A football kicker can give the ball an initial speed of 27 m/s. He is 53 m from the goalpost which has a crossbar 3.09 m high. What is the smallest angle of elevation that he can kick the football and score a field goal
a 5g snail crawls at 0.6mm/s between two rocks 14 cm apart. Treating this system as an infinite square well, determine the approximate quantum number
Assume that light of wavelength 550 nm is being observed. Also suppose that diffraction effects, rather than atmospheric turbulence, limit the resolving power of the telescope. Find the greatest distance that these stars might be from the earth.
Human skin is most sensitive to ultraviolet light of approximate wavelength 300 nm. The threshold for sunburn occurs when 1 cm2 of skin absorbs about 1015 of these UV photons over an interval of several hours or less. How much energy is absorbed
A wheel of mass 1.24kg and radius 0.44 (I = 0.5mr^2) starts from rest and rolls without slipping for a distance of 1.7m down a 35 degree incline. How fast is it traveling at that point?
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