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A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 275 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. Facing the axle, a 27.0-kg child hops onto the merry-go-round and manages to sit down on the edge. What is the new angular speed of the merry-go-round?
A machine part rotates at an angular speed of 0.48 rad/s; its speed is then increased to 2.8 rad/s at the angular acceleration of 0.61 rad/s2.
When a uniform electric field directed horizontally (from left to right) is introduced, equilibrium is eventually established with the mass hanging at an angle
An electron moves in a circular path perpendicular to a constant magnetic field with a magnitude of 2.00 mT. The angular momentum of the electron about center of the circle is 5.50 multiplied by 10-25 J·s.
If the mass is suspended by a spring M = 200g, What is the value of the spring constant of the spring
Two sound speakers separated by a distance of 3-meters, are driven in phase by same audio amplifier. A listener sits directly in front of one speaker at a distance of 4 meters from it so that listener and speakers form a right triangle.
What frequency is heard by an observer who hears the 450-Hz siren on a police car traveling at 35 m/s away from her
A 150 g ball and a 250g ball are connected by a 35{rm cm}-long, massless, rigid rod. The balls rotate about their center of mass at 150 rpm.
The loaded cab of an elevator has a mass of 3x10^3 kg and moves 177m up the shaft in 23 s at constant speed. At what average rate does the force from cable do work on the cab.
a 5g snail crawls at 0.6mm/s between two rocks 14 cm apart. Treating this system as an infinite square well, determine the approximate quantum number
IP Halley's Comet Halley's Comet, which passes around the Sun every 78 years, has an elliptical orbit. When closest to the Sun (perihelion) it is at a distance of 8.823 x 10^10 m and moves with a speed of 54.6 km/s. The greatest distance between Hall..
Record the resistance and current values calculated in questions 5, and load the numbers into a spreadsheet. Make a plot of the current I as a function of the total resistance R. (Remember that the R values will go on the x-axis and the I values o..
The acceleration due to gravity on the Moon's surface is known to be about one-sixth the acceleration due to gravity on the Earth. find the mass of the Moon in terms of the mass of the Earth
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