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Two infinitely large sheets of charge are vertical, parallel to each other, and 24.0 cm apart. One of the sheets has a charge density of +4.60 x 10 -7 C/m2. The other sheet's charge density is unknown. Exactly half-way between the two sheets is a small charged mass on the end of an insulating thread. The mass is 2.30 x 10 -7 kg, the charge is -8.20 x 10 -12 C, and the thread is 6.40 cm long. In equilibrium, the thread makes an angle of 9.50°, relative to vertical, away from the unknown sheet. Calculate the unknown sheet's surface charge density.
you apply a potential difference of 4.5 volts between the ends of a wire that is 2.5 m in length and .654mm in radius. What length of nichrome wire will you use
A crate with a mass of 171.5 kg is suspended from the end of a uniform boom with a mass of 80.3 kg. The upper end of the boom is supported by a cable attached to the wall and the lower end by a pivot (marked X) on the same wall. compute the tensio..
A potential energy function for a two-dimensional force is of the form U = 3.89x3 y - 5.96x. Calculate the force that acts at the point (1.28m,1.17m). Enter the x-component first and then the y-component.
you are to launch a rocket from just above the ground with one of the following initial velocity vectors 1 v initial
A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, What was the bear's average speed
If the speed of sound is 1100 feet per second and a tuning fork oscillates at 440 cycles per second, what is the wavelength of sound produced.
n undamped 1.47-kg horizontal spring oscillator has a spring constant of 25.1 N/m, What is the oscillator\'s total mechanical energy as it passes through a position that is 0.651 of the amplitude
At rest, a car's horn sounds the note A (440 Hz). The horn is sounded while the car is moving down the street. find Is the cyclist ahead of or behind the car
A wheel is spinning at 19 rad/s. Over a period of 50 s it is spinned up to 424 rad/s. Determine its angular acceleration while it was spinning up
A 0.75 mm diameter copper wire carries a small current of 3.5 µA. What is the drift speed of the electrons in the wire
Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 40.0s to speed up from rest to its top speed of 1 rotation every 1.50s, What is the astronaut's tangential acceleration during the first 40.0s
A child sits still on a swing that is supported by two chains. Each chain makes a 15.0° angle with the vertical. The child's mass is 25.0 kg. What is the tension in each chain? (Ignore the mass of the seat and chains.)
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