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A solid disk rotates in the horizontal plane at an angular velocity of 0.0693 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.189 kg·m2. From above, sand is dropped straight down onto this rotating disk, so that a thin uniform ring of sand is formed at a distance of 0.391 m from the axis. The sand in the ring has a mass of 0.495 kg. After all the sand is in place, what is the angular velocity of the disk?
A tungsten wire has a radius of 0.089 mm and is heated from 20.0 to 1362 oC, When 100 V is applied across the ends of the hot wire, a current of 1.8 A is produced
It walks 2.1 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find out how far the dog is then from the shore.
q1. a fan at a rock concert is 30 m from the stage where the sound intensity level is 110 db. her eardrums have a
A wire carries current to the north (towards the top of the computer screen) through a magnetic field. what is the direction of the magnetic force on the current-carrying wire
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. If the ball was moving horizontally when it was caught, how fast was the ball travelling
An object moves with constant acceleration 4.80 m/s2 and over a time interval reaches a final velocity of 12.6 m/s.
What is the tangential acceleration of a bug on the rim of an 11.00 in.-diameter disk if the disk accelerates uniformly from rest to an angular speed of 79.03 rev/min in 3.60 s? One second after the bug starts from rest, what is its centripetal accel..
The water pump on the engine of an automobile has a mass flow rate of 8.30 lbm/s. The water enters at 0.00 psig with a velocity of 1.00 ft/s and leaves at 10.0 psig with a velocity of 10.0 ft/s with no change in height or tempe..
A simple pendulum has a length of 52.4 cm and makes 83.7 complete oscillations in 2.00 min. Find the period of the pendulum
A hill that has a 15.8 % grade is one that rises 15.8 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal
the current is an inductor is .10 A and the frequency is 750 hz. if the inductance is .080 H what is the voltage across the inductor
At the equilibrium position, the piston is situated at the hight l0 from the bottom of the cylinder. The pressure outside of the cylinder is P0, the cross section of the cylinder and the piston is S.
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