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Disks A Review Problems and B are made of the same material and are of the same thickness; they can rotate freely about the vertical shaft. Disk B is at rest when it is dropped onto disk A, which is rotating with an angular velocity of 500 rpm. Knowing that disk A weighs 18 lb, determine
(a) the final angular velocity of the disks,
(b) the change in kinetic energy of the system.
Two steel guitar strings have the equal length. String A has a diameter of 0.60 millimeter and is under 450 Newton of tension. Determine what the ratio of the wave speeds
What is the difference between series and parallel circuits? Specify in words and algebraic formula, if possible, the relationships between current, voltage, and resistance in each type of circuit.
A 60 kg skier is in a tuck and moving straight down a 30 degree slope. What is the resultant of the external forces that act on the skier
The position of a squirrel running in a park is given by : r=[(00.280 m/s)t+(0.0360 m/s^2)t^2]i+(0.0190 m/s^3)t^3j. At 4.20 , how far is the squirrel from its initial position
Two long straight wires are parallel and 7.8 cm apart. Theyare to carry equal currents such that the magnetic field at a pointhalfway between them has magnitude 350 µT. How much current(in A) is needed?
An electron moving along the x axis has a position given with x = 17.0 te^-t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?
a box rests on a frozen pond which serves as a frictionless horizontal surface. if a fisherman applies a horizontal
The plates of a 3.1 nF parallel-plate capacitor are each 0.27 m^2 in area. How far apart are the plates if there's air between them
Suppose that a 7 centimeter diameter, 120 Watt light bulb radiates all its energy as a single wavelength of visible light. Find the electric field strength at the surface of the bulb
Illustrate what angular speed must such a cylinder have so that the centripital acceleration at its surface equals the free-fall acceleration on Earth?
1.) What are the factors in determining your takeoff critical field length for a certain runway? If after doing initial calculations you find the runway is too short, what might you be able to do as the pilot in command to be legal for takeoff?
Consider a spherical asteroid with a mass of 6.00×10^15 kg and a radius of 9.70 km. What is the speed of a satellite orbiting 6.00 km above the surface
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