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A student sitting on a frictionless rotating stool has rotational inertia 0.95 about a vertical axis through her center of mass when her arms are tight to her chest. The stool rotates at 6.85 and has negligible mass. The student extends her arms until her hands, each holding a 4.2 mass, are 0.77 from the rotation axis. Ignoring her arm mass, what's her new rotational velocity?
One of your friends pulls on a rope with 3 units of force and other pulls on a second rope with 5 units of force, How hard and what direction must you pull
An air-filled parallel plate capacitor with a plate spacing of 1.50 cm has a capacitance of 7.20 ?F. Calculate the dielectric constant of the inserted material
the velocity of an airplane is 50km/hr due north. the plane the plane flies into a cross wind of 50km/hr due east at a right angle
A ball of mass 0.60 kg is fired with velocity 140 m/s into the barrel of a spring gun of mass 2.5 kg initially at rest on a frictionless surface. The ball sticks in the barrel at the point of maximum compression of the spring.
A piano tuner stretches a steel piano wire with a tension of 964N. What is the frequency of its fundamental mode of vibration
Two electrodes are placed in a calcium chloride solution and a potential difference is maintained between them. what is the current in the solution
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. What is the radius of a chamber
n = 3.59 mol of Hydrogen gas is initially at T = 386 K temperature and pi = 1.78×105 Pa pressure. How much work did the external force perform
A 547-kg satellite is in a circular orbit about Earth at a height above Earth equal to Earth's mean radius. Find the gravitational force acting on it
The minute hand of a wall clock measures14 cmfrom its tip to the axis about which it rotates. find angle from a quarter after the hour to half past
define the magnitude of the torque on the dipole.
a 3.8 kg block is accelerated from rest by a compressed spring of spring constant 650 N/m. What is the original compression distance of the spring
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