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A solid disk rotates in the horizontal plane at an angular velocity of 0.038 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.11 kg ·m2. From above, sand is dropped straight down onto this rotating disk, thus that a thin uniform ring of sand is formed at a distance of 0.40 m from the axis. The sand in the ring has a mass of 0.50 kg. After all the sand is in place, what is the angular velocity of the disk?
A 44-g ball consists of a plastic spherical shell and a water-filled core. the shell has an outside diameter equal to 41.6 mm and an inside diameter equal to 16.5 mm. What is the density of the plastic?
An electron passes through a point 3.91 cm from a long straight wire as it moves at 33.7% of the speed of light perpendicularly toward the wire. The wire carries a current of 11.3 A. Find the magnitude of the electron\'s acceleration at that point.
a boy is laying on a sled wich is on an ice covered hillinclined at an anlge of 15 degrees if the boy, what is the force pulling them down the hill
On the salt flats of Bonnevile, Utah (latitude ?41?^o N) the British auto racer John Cobb in 1947 became the first man to travel at a speed of 400 mph on land. If he was headed due north at this speed, find the ratio of the magnitude of the Coriolis ..
The wingspan (tip-to-tip) of a Boeing 747 jetliner is 59 m. The plane is flying horizontally at a speed of 220 m/s. Find the emf induced between the wing tips
Three objects with masses, m1 = 6.0 kg, m2 = 10.0 kg, and m3 = 15.0 kg, are attached by strings over frictionless pulleys as indicated. The horizontal surface is frictionless and the system is released from rest. Using energy concepts, find out th..
Two rockets having the same acceleration start from rest, but rocket A travels for twice as much time as rocket B, If rocket A reaches a speed of 390m/s , what speed will rocket B reach
The mass of a string is 1.00 10-3 kg, and it is stretched so the tension in it is 120 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string?
question a 2590-kg spacecraft is in a circular orbit 2720 km above the surface of mars.how much work must the
Some people think that they can stop themselves rushing forward by putting their hands on the dashboard. Find out the mass of the object that has a weight equal to force you just calculated.
A loaded penguin sled with weight W rests on aplane inclined at angle θ to thehorizontal (Fig. 6-28). Between the sled and the plane, the coefficient of static frictionis µs, and the coefficient ofkinetic frictionis µk.
an engine performs a total of 15000 j of work in one minute: what is its power output in kilowatts and in horsepower
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