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A physics student is standing on an initially motionless,frictionless turntable with rotational inertia 0.31kg·m2. He's holding a wheel of rotational inertia0.22 kg·m2 spining at 128 rpm about a vertical axis, as we showed inFig. 11.8. When he turns the wheel upside down, student andturntable begin rotating at 80 rpm.a) What is the student's mass, considering him to be acylinder 30 cm in diameter?b) How much work did he do in turning the wheel upside down? Neglect the distance between the axes of the turntable and wheel.
Two 100cm2 parallel electrodes are spaced 2cm apart. Oneis charged +5μC, the other -5μC, A 1.0cm x 1.0cm surfacebetween the electrodes is tilted to where its normal makes a 45degree angle with the electric field. What is the electric flux through ..
A man pulls a 300 N object across a horizontal surface using a100 N force applied at a 35° angle. What is the normal force?If the object is pulled at constant speed, what is the coefficientof friction?
an electron moves through an electric field and its speed drops from 2800 ms to 1900 ms. whats the potential difference
consider an atomic nucleus to be equivalent to a one-dimentional infinite potential well. what is the wavelength of the emitted light
A person is riding a bicycle, and its wheels have an angularvelocity of +20.5rad/s. How much time does it take for the bike tocome to rest
When a 0.111 kg mass is suspended at rest from a certain spring, the spring stretches 4.10 cm. Find the instantaneous acceleration of the mass when it is raised 5.80 cm, compressing the spring 1.70 cm.
On a dry day, just after washing your hair to remove natural oils and drying it thoroughly, run a plastic comb through it. Small bits of paper will be attracted to the comb. Explain why.
If she hears the rope hit the ground 5.31 seconds later, how deep is the pit? Assume the speed of sound in air 345.0 m/s
A cubical block of ice 56.0 cm on an edge is placed on a level floor over a speck of dust. How many cm below the upper surface of the ice
With brakes fully applied, a 1550 kg car deccelerates from a speed of 78.0 km/hr. What is the change in the kinetic energy of the car
A dentist's mirror is placed 2.4 cm from a tooth. The enlarged image is located 6.4 cm behind the mirror. How is the image oriented relative to the object
a straight wire is aligned north-south in a region where earths magnetic field barrowbold is directed 52.0deg above the
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