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A uniform solid disk of mass m = 3.05 kg and radius r = 0.200 m rotates about a fixed axis perpendicular to its face with angular frequency 5.97 rad/s.
(a) Calculate the magnitude of the angular momentum of the disk when the axis of rotation passes through its center of mass.
? kg · m2/s
(b) What is the magnitude of the angular momentum when the axis of rotation passes through a point midway between the center and the rim?
A styrofoam cooler (k = 0.030 W/(m·K)) has outside dimensions of 0.270 m by 0.230 m by 0.280 m, and an average thickness of 2.6 cm. About how long would it take for 1.60 kg of ice at 0 °C to melt in the cooler if the outside temperature is 30.0 °C..
Assume a small child rolls off a bed that is 0.38m above the floor. If the floor is hardwood, the child's head is brought to rest in approximately 2.2mm. If the floor is carpeted, this stopping distance is increased to about 1.1cm.
A 270 pF capacitor is charged to a potential difference of 60 V, and the charging battery is disconnected. Calculate the dielectric constant of the inserted material
An ideal transformer's primary has 2000 turns and secondary has 50 turns. The primary is connected to a source of 120 V, Find the current in the secondary
Three equal point charges, each with charge 1.00 , are placed at the vertices of an equilateral triangle whose sides are of length 0.350. Illustrate what is the electric potential energy of the system?
Starting from rest, you move with a constant acceleration of 2.1 m/s2 for 13.0 s and then move with an acceleration of -2.1 m/s2, What is your maximum speed attained
A child, hunting for her favourite horse, is running on the ground around the edge of a stationary merry-go-round. The angular speed of the girl has a constant value of .250 rad/sec.
Two wires are identical, except that one is aluminium and one is gold. The aluminium wire has a resistance of 0.18. What is resistance of the gold wire.
David is driving a steady 21.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.80 m/s^2 at the instant when David passes.
A 44 cm diameter loop is rotated in a uniform electric field until the position of maximum electric flux is found. The flux in this position is 5.40 x10^5 N·m2/C. What is the magnitude of the electric field.
If a block of wood floating on a pool of water has a volume of 37 cm3anddisplaces a volume of waterof 30 cm3, what is the densityof the wood
A series RCL circuit contains a 4.99-µF capacitor and a generator whose voltage is 11.6 V. At a resonant frequency of 1.20 kHz the power delivered to the circuit is 24.1 W. Find the value of the inductance
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