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The angular velocity of a rotating disk was reduced at a constant rate from 3.40 rad/s to 2.00 rad/s at the end of 20.00 cycles. What is the constant angular acceleration of the disk? How long does it take to slow down?
The mast of a sailboat is supported at the bow and stern by stainless steel wires, the forestay and backstay, Find the tension in the backstay and the force that the mast exerts on the deck
The moon's diameter is 3.5 * 103 km, and its distance from the earth is 3.8 * 105 km. Calculate the position and size of the image formed by the Hale Observatory reflecting mirror, whose focal length is 16.5 m.
A sledge loaded with bricks has a total mass of 17.5 kilogram and is pulled at constant speed by a rope inclined at 19.6 degree above the horizontal. Evaluate what is the tension in the rope
the electromagnetic wave that delivers a cellular phone call to a car has a electric field with an rms value of 4.5e10^-2. find the intensity of the wave generated by this phone call
The hour, minute, and second hands on a clock are 0.25 meter, 0.31meter, and 0.37 meter long, correspondingly. Find the distances traveled by the tips of the hands in a 35 minute interval
A car is rounding a curve with a radius of 12.0 m at 8.2m/s when it hits a slippery patch. What is the minimum coefficientof static friction between the car and the slick patch of road that will allow the car to round the corner safely?
An L-R-C circuit has an inductance of 0.410 , a capacitance of 2.75×10?5 , and a resistance of R. What is the angular frequency of the circuit
an greenhoopwith mass mh 2.7 kg and radius rh 0.14 m hangs from a string that goes over a blue soliddiskpulley with
A 1200 kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear-end of a 8200 kg truck moving in the same direction at 20.0 m/s. The velocity of the car right after the collision is 18.0 m/s to the east. What..
A stunt man whose mass is 70 kg swings from the end of a 4.40-m long rope along the arc of a vertical circle. Assuming that he starts from rest as rope is horizontal, find out the tensions in the rope that are required to make him follow his circu..
What properties of light might be involved in reflection, What changes occur in the properties of light such as wavelength, frequency, and amplitude during reflection
A circuit contains six 219 O lamps with 60-W bulbs and a 9.4 O heater connected in parallel. The voltage across the circuit is 126 v. What is the current in the circuit if six lamps and the heater are operating?
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