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A charge of -3.89C is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.0809 m). The charges on the circle are -4.74C at the position due north and +7.12C at the position due east. What is (a) the magnitude and (b) direction of the net electrostatic force acting on the charge at the center? Specify the direction as an angle relative to due east.
a converging lens has a focal length of f 26 cm. an object is placed 37 cm from the lens. find the size of the image
A Ferris wheel is moving at an initial angular velocity of 1.0 rev/48 s. If the operator then brings it to a stop in 3.4 min, what is the angular acceleration of the Ferris wheel
A flashlight bulb with a resistance of 40 ohm is powered with a six volt battery and produces .75W power. obtain the internal resistance of the battery
Suppose you see two main-sequence stars of the same spectral type. Star 1 is dimmer in apparent brightness than Star 2 by a factor of 100. What can you conclude? (Overlook any effects that might be caused by interstellar dust and gas.)
A 25 NC charge moves in the -x direction and parallel to the direction of a uniform electric field (200N/C), What is the charge's mass
One type of slingshot can be made from a length of rope and a leather pocket for holding the stone. The stone can be thrown by whirling it rapidly in a horizontal circle and releasing it at the right moment. Such a slingshot is used to throw a sto..
q1. a sailboat is running along a straight course with the wind providing a constant force of 55 lb. the only other
Two isotopes of a certain element have binding energies that differ by 4.7540 MeV. The isotope with the larger binding energy contains one more neutron than the other isotope. Find the difference in atomic mass between the two isotopes
A boy shoves his stuffed toy zebra down a frictionless chute, starting at a height of 1.67 m above the bottom of the chute and with an initial speed of 1.97 m/s. The toy animal emerges horizontally from the bottom of the chute and continues sliding a..
A parallel plate capacitor has a surface area of A = 33.2 cm2 and a plate separation of d = 13.3 mm. How much charge does the capacitor store, when it is connected to a battery supplying a voltage of V = 20.3 V?
A worker pushed a 22 kg block 8.1 m along a level floor at constant speed with a force directed 39° below the horizontal. find the increase in thermal energy of the block-floor system
The centers of a 12 kg lead ball and a 100 g lead ball are separated by 10 cm. What gravitational force does each exert on the other
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