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Starting from rest, a disk rotates about its central axis with constant angular acceleration.In 5.0 s,it rotates 25 rad. During that time what are the magnitudes of:
(a) the angular acceleration?
(b) the average angular velocity?
(c) What is the instantaneous angular velocity of the disk at the end of the 5.0 s?
(d) With the angular acceleration unchanged,through what additional angle will the disk turn during the next 5.0 s?
What focal length does the lens need? Assume that it is a thin lens. How far should you place the lens from the slide?
A charge of +q is located atthe origin, while an identical charge is located on the xaxis at x = 0.49 m. A thirdcharge of +4q is located on the x axis atsuch a place that the net electrostatic force on the charge at theorigin triples, its directio..
You are asked to construct a capacitor having a capacitance near 1 nF and a breakdown potential in excess of 11000 V. What is the breakdown potential of this capacitor
Some bacteria are propelled by biological motors that spin hair-like flagella. What is the angular speed (the magnitude of the angular velocity) of this bacterial motor
The magnetic field at the center of a solenoid is equal to the earth's magnetic field at that point (5.00*10 -5 T). The solenoid is one meter long and has 140turns. Compute the current required to produce this field.
A fluist assembles her flute in a room where the speed of sound is 342 m/s. When she plays the note A, it is in perfect tunewith 440Hz tuning fork. After a few minutes, the air inside herflute has warmed to where the speed of sound is 346 m/s.
A) If the squid has 1.75 kg of water in its cavity, at what speed must it expel this water to instantaneously achieve a speed of 2.70 m/s to escape the predator? Neglect any drag effects of the surrounding water. B) How much kinetic energy does th..
A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. find the magnitude of the frictional force exerted on the ladder
A 3 kg block is observed to accelerate at a rate twice that of the 6 kg block. Is the net force acting on the 3 kg block therefore twice as large as that performing on the 6 kg block? Explain.
1. A 50.0 kg block is pulled from rest by a force of 1000.0 N at an angle of 37.0° across a horizontal rough surface over a distance of 5.60 m. The coefficient of kinetic friction between the block and the surface is 0.500.
A proton accelerates from rest through 1500 volts. the proton then enters a region of space where the magnetic field is 0.3 tesla (and this field is perpendicular to the velocity). calculate the radius of the resulting circular motion?
In an experiment 70 gram of ice at 0 degrees Celsius is dropped into 300 gram of water at 50 degrees Celsius. what is the final temperature of thermal equilibirium
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