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A 10.0-kg mass is placed on a 25.0o degree incline and friction keeps it from sliding. The coefficient of static friction in this case is 0.580, and the coefficient of sliding friction is 0.520. The mass is given a shove causing it to slide down the incline. What is the frictional force while the mass is sliding?
A car moving at 30.0 m/s is approaching a factory whistle that has a frequency of 500 Hz. find the apparent frequency of the whistle as heard by the driver
what resistance would have to be connected in series with a 3V lamp in a 28 V circuit when the operating current of the lamp is .5 A
An electron with mass 9.11×10-31 kg moves with a speed of 2.10×106 m/s in a circle of 2.94 cm radius under the influence of a magnetic field. What is the radius of the proton's orbit
In a common lecture demonstration of wave pulses, If the tubing is given a transverse blow at one end, how long will it take the resulting pulse to reach the other end
The rotor in a certain electric motor is a flat, rectangular coil with 82 turns of wire and dimensions 2.25 cm by 3.88 cm. The rotor rotates in a uniform magnetic field of 0.800 T. Find the maximum torque acting on the rotor
Two wooden crates rest on top of one another. The smaller top crate has a mass of m1 = 24.0 kg and the larger bottom crate has a mass of m2 = 86.0 kg. What is the acceleration of the small crate
A hard disk in your computer spins at 5400 rpm. if this disk turns through 12 revolutions before coming to a stop, find the disks angular acceleration
If the blocks move determine the magnitude of their acceleration. If the blocks move determine the magnitude of the tension in the string. If the blocks do not move evaluate the sum of the magnitude of the forces of friction acting on the blocks...
How many electrons should be removed from an initially uncharged spherical conductor of radius 0.100 m to produce a potential of 8.50 kV at the surface
Three resistors with values 1.2 , 2.3 , and 5.0 , respectively, are connected in parallel in a circuit with a 5.0 V battery, what is the pwer delivered to the 5 ohm resistor
A child ties a rock to a string and whirls it around in a horizontal circle. Find the period of its uniform circular motion
A 68 kg student balances a 1400 elephant kg on a hydraulic lift. When a second student joins the first, What is the second student's mass
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