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A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 3.7 kg · m2. A second student tosses a 1.8-kg mass with a speed of 2.9 m/s to the student on the stool, who catches it at a distance of 0.33 m from the axis of rotation. What is the resulting angular speed of the student and the stool?
rad/s
A 42.0 kg seal at an amusement park slides from rest down a ramp into the pool below. If the seal reaches the water with a speed of 4.30 m/s, what is the work done by kinetic friction
A negative charge of -0.525%u03BCC exerts an upward 0.205N force on an unknown charge 0.310m directly below it. What is the unknown charge in microcoulombs
A nanowire is a (nearly) one-dimensional structure with a diameter on the order of a few nanometers.
A gold nucleus contains 197 nucleons packed tightly against each other. A single nucleon (proton or neutron) has a radius of about 1.310-15 m. Calculate the approximate radius of the gold nucleus. (Hint: Remember that the volume of a sphere is (4/..
a soccer ball is kicked with an initial horizontal speed of 5 m/s and an initial vertical speed of 3m/s. find the ball's verical speed at the apex of the flight
In a TV-show, an inexperienced doctor touches the electrodes of a defibrillator and gets thrown across the room, what is the maximum height above ground he could reach
A television is tuned to a station broadcasting at a frequency of 6.30×10^7Hz. Find the optimum length of the antenna
An object, at the top of a very tall building, is released from rest and falls freely due to gravity. Neglect air resistance and compute distance covered by the object between times t1 = 5.5 s and t2 = 7.9 s after it is released.
A 747 airliner reaches its takeoff speed of 187 mi/h in 31.4s. What is the magnitude of its average acceleration.
Two point charges are separated by d= 10 cm and have charges of q1= +2(mu)C and q2= -2 (mu)C, respectively, What is the magnitude of the electric force between the two charges
Students in a fraternity house want to be able to spray water 25 m across their neighbor's yard onto a patio. What size nozzle do they need
A +2.7 µC charge is 32 cm to the right of a -5.3 µC charge. At the midpoint between the two charges, determine the potential and the electric field
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