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Two small plastic balls hang from threads (1m long) of negligible mass. Each ball has a mass of 0.09 g and equal charges. The balls are repelled with each other .they are 18cm apart and the threads attached to the balls make an angle of 25 degree with the vertical. Decide:
1. The tension in each of the threads.
2. The magnitude of the charge q on the balls.
3. The magnitude of the electric force acting on each ball.
You are designing a digital camera, and want each detector element to have a width equal to the distance between the first zeros of the first zeros of the diffraction-limited point spread function
the hanging object has a mass of m1 = 0.445 kg; the sliding block has a mass of m2 = 0.750 kg; and the pulley is a hollow cylinder with a mass of M = 0.350 kg, Find the angular speed of the pulley at the same moment
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a glass bottle of soda is sealed with a screw cap. the absolute pressure of the carbon dioxide inside the bottle is
three identical thin rods each of length l and mass m are welded perpendicular to one another as shown in figure
A radar system can measure the time delay between the transmitted and reflected wave pulses from a distant airplane with an accuracy of 1.02 picoseconds. What is the accuracy in the calculated distance to the plane
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To avoid a rear-end collision with a slow moving vehicle ahead, you step on the accelerator and increase your angular speed to 13.4 x 10-2 rads/s in a time of 8 s. What is the tangential acceleration of the car
A ball rolls down a roof that makes an angle of 30 degrees to the horizontal. The ball has an initial speed of 5 m/s and the roof is 7 meters tall. how far from the base of the house does it land
A rifle is aimed horizontally at a target 51 {rm m} away. The bullet hits the target 1.5 {rm cm} below the aim point. What was bullet's speed as it left the barrel.
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