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Two identical, small insulating balls are suspended by separate 0.36-m threads that are attached to a common point on the ceiling. Each ball has a mass of 4.5 × 10-4 kg. Initially the balls are uncharged and hang straight down. They are then given identical positive charges and, as a result, spread apart with an angle of 46o between the threads. Determine
(a) the charge on each ball and
(b) the tension in the threads.
A compressed-air cylinder is known to fail if the pressue exceeds 100 atm. What is the pressure inside the cylinder during the fire
A Coast Guard cutter detects an unidentified ship at a distance of 23.0 km in the direction 15.0° east of north. Find the time required for the cutter to intercept the ship
A speedboat moves on a lake with initial velocity vector v1,x = 8.21 m/s and v1,y = -2.95 m/s, What are the components of the speedboat\'s final velocity, Find the speedboat's final speed
Three resistors, 2.57ohm, 2.51ohm, and 4.45ohm, are connected in series across a 24.4-V battery
Two identical conducting spheres, fixed in place, attract each other with a force of 0.094 N when their center to center separation is 60.00 cm. What was the initial negative charge on one of the spheres
At one instant, a system has 30J of kinetic energy and 30J of potential energy. How much work was done by conservative forces
An 8300-pF capacitor holds plus and minus charges of 1.35×10?7C. What is the voltage across the capacitor
What intensity level of the horn's sound is observed by somebody waiting at an intersection 58m from the train.
A soccer ball is kicked from the ground at an angle of ? = 60 degrees with respect to the horizontal, What is the total horizontal distance, (dm), in meters, traveled by the ball in the time, tm
A 16 g rifle bullet traveling 180 m/s buries itself in a 3.5kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. find the horizontal component of the pendulum's maximum displacement.
A 1300kg sports car accelerates from 0m/s to 33m/s in 12s . What is the average power of the engine?
During a fun run a girl runs for 12 s moving 2.7 m/s. She then accelerates at 0.5 m/s^2 over the next 25 m. What distance did she cover during the entire period
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