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A pith ball that has a mass of 0.25 grams, is hung by a string and suspendedin a region of space where there is a uniform electric field that points to theleft. The pith ball is observed to deflect to the right and the string makes anangle of 10.0 degrees with the vertical. Find the Magnitude of the electric force on the pith ball?
A distant galaxy is moving away from the earth with a speed that results in each wavelength received on the earth being shifted so that ??= 1.65 ?0
two shortwave radio antennas broadcast identical in-phase signals at the same frequency. the transmitters are 176.0 m
What is the maximum instantaneous power dissipated by a 1.0 hp pump connected to a 240-Vrms ac power source
The top of a tower much like the leaning bell tower at Pisa, Italy, moves toward the south at an average rate of 1.2 mm/y. determine the average angular speed of the tower top about its base
A cart has a mass of 851.8 g the attached string has a tension of 0.36 N and a displacement of 40.9 cm. what is the kinetic energy of the cart
In the solar system frame, two events are measured to occur 3.0 hours apart in time and 1.5 hours apart in space. What is the time seperation between the events in the alien's frame
At amusement parks, there is a popular ride where the floor of arotating cylindrical room falls away, leaving the backs of theriders "plastered" against the wall. Suppose the radius of the roomis 3.52 m and the speed of the wall is 11.5 m/s when t..
A person jumps up and down on a trampoline, while staying in contact with it. The motion is simple harmonic motion and it takes 1.90s to complete one cycle.
One end of an iron rod 40 cm long and 3.3 cm in diameter is in ice water, the other in boiling water. What is the heat-flow rate along the rod
A uniform stick of length L = 1.8 m, width W = 10.0 cm, and mass M = 4.8 kg oscillates as a physical pendulum, Calculate the minimum value of the period of the pendulum
A 3.0-kg wheel in the form of a solid disk rolls along a horizontal surface with a speed of 5.0 m/s. What is the total kinetic energy of the wheel
A parallel-plate capacitor has an initial charge q, a plate separation distance d, and a plate area A. How much work must you do (in terms of q, d and A) to increase the separation distance to 3d if the capacitor is isolated?
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