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A student on a piano stool rotates freely with an angularspeed of 3.07 rev/s. The student holds a 1.39 kg mass in eachoutstretched arm, 0.759 m from the axis of rotation. The combinedmoment of inertia of the student and the stool, ignoring the twomasses, is 4.72 kg m^2, a value that remains constant. As thestudent pulls his arms inward, his angular speed increases to 3.54rev/s. How far are the masses from the axis of rotation at thistime, considering the masses to be points? Calculate the initial and final kinetic energy of the system?
A parallel-plate air capacitor has a capacitance of 400pF and a charge of magnitude 0.150\muC on each plate. What is the area of each plate
If the average molecular mass of compounds in food is 47.5, how many molecules are there in 1.00 kg of food, Find the ratio of ion pairs to molecules
If you wrapped a wire 1000 times around a hollow cylinder that was 10 cm long, and forced 4.0 amps of current through this solenoid, what would the strength of the magnetic field be
The atmosphere on Mars is almost all carbon dioxide (CO2), and has a pressure of about 6.9×102 Pa, what is the mass of one cubic meter of the atmosphere
A pendulum with a mass of 1kg. on a light string 1 meter long is dropped from a position with the string held level falling until it as its lowest point. What is the velocity of the bullet
The magnitude of the force exerted by a spring is given by F = kx where x is the amount of stretching/compressing of the spring. What must be the units associated with k expressed in terms of fundamental SI units?
Two identical wheels are moving on horizontal surfaces. The center of mass of each has the same linear speed. Determine the maximum height reached by each wheel as it moves up the incline
Three equal point charges, each with charge 1.45?C, are placed at the vertices of an equilateral triangle whose sides are of length 0.650m
A 1150 kg car rolling on a horizontalsurface has speed v = 50 km/h, What is the spring stiffness constant of the spring
Suppose that a 1.00 cm3 box in the shape of a cube is perfectly evacuated, except for a single particle of mass 1.05 10-3 g. Find the average pressure on the other walls
The longest recorded pass in an NFL game traveled 83 yards in theair from the quarterback to the receiver. Assuming that thepass was thrown at the optimal 45 degree angle, what was the speedat which the ball left the quarterbacks hand?
what is the emf generated in the square loop as it is moved to the right in 0.2s out of the 0.8 T magnetic field? what is the intensity of the wave
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