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A solid cylindrical disk is to be used as a stabilizer in a ship. By using a massive disk rotating in the hold of the ship, the captain knows that a large torque is required to tilt its angular momentum vector. The mass of the disk to be used is 1.00 105 kg and it has a radius of 2.05 m. If the cylinder rotates at 300.4 rpm, what is the magnitude of the average torque required to tilt its axis by 53.1° in a time of 3.00 s? [Hint: Draw a vector diagram of the initial and final angular momenta.]
A block with mass m = 4 kg is sitting on the ground and not moving. The acceleration due to gravity is g = 9.81 m/s2. Please answer the following questions.
A typical coal-fired power plant has a generating capacity of about 1.3 X 10^9 W of electric power. What is the overall thermal efficiency of the plant
A bar magnet is dropped through a coil of wire. Describe what will be observed on the galvanometer by sketching a graph of induced emf versus time
A 1.7kg , 20-cm-diameter turntable rotates at 50rpm on frictionless bearings, What is the turntable's angular velocity, in rpm, just after this event
A projectile is fired at 67.5 o above the horizontal. Its initial speed is equal to 90.0 m/s. evaluate the maximum height reached by the projectile
The 50 cm tall object(arrow) is located 75 cm away from the diverging lens plane ( focal length 50 cm). Calculate the distance to the image of the object
The energies associated with molecular rotation and vibration are quantized and photons can be emitted or absorbed by molecules making transitions from one rotational or vibrational state to another.
A ship sets sail from Rotterdam, The Netherlands, heading due north at 5.00 m/s relative to the water. What is the velocity of the ship
An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is = 1.6 x 10-7 C/m2, and the plates are separated by a distance of 1.3 x 10-2 m. How fast is the electron moving just befor..
A flywheel having constant angular acceleration requires 4.6-{rm s} to rotate through 162 rad. Its angular velocity at the end of this time is 100 rad/s. Find out the angular velocity at the beginning of the 4.6s interval; the angular acceleration..
A uniform electric field with a magnitude of 5650 N/C points in the positive x direction. Find the change in electric potential energy when a +15.5-"mu"C charge is moved 4.50 cm in the positive y direction.
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.12 106 m/s. Find the centripetal acceleration of the electron
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