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A point charge of -10 C is located 5km above the earth's surface. Assume the surface is a perfectly flat conductor.
a) What is the magnitude and direction of the electric field directly below the charge?
b) What is the magnitude and direction of the electric field at the surface, directly below the charge?
c) Calculate the surface charge density directly below the charge.
d) Calculate the surface charge density at the surface beneath charge.
A ball of mas 0.250. Kg is attached to a string 0.750 m long. The ball is swung in a s pendulum-type motion such that it has a speed of 6.40 m/s, What is the corresponding tension in the string
A model rocket rises with constant acceleration to the height of 3.7, at which point its speed is 25. what was the magnitude of the rocket's acceleration.
A concave shaving mirror has a focal length of 35 centimeter. Find the image position of a cologne bottle placed in front of the mirror at a distance of 83 centimeter
Janet jumps off a high diving platform with a horizontal velocity of 1.55 m/s and lands in the water 1s later. How high is the platform? The acceleration of gravity is 9.80 m/s2.
Moon effect. Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. By what percent does your weight (as measured on a scale) decrease
A child holds a candy bar 10.0 cm in front of a convex mirror and notices that the image is only one-half the size of the candybar. What is the radius of curvature of the mirror?
An 30-kg person puts on a life jacket, jumps into the water, and floats. The jacket has a volume of 2.8x10^(-2) m^3 and is completely submerged under the water. What is the density of the life jacket
A coin 1 cm in diameter is embedded in a solid glass ball of radius 20cm. Find the position of the image of the coin and the height of the coin's image
Use the three principal rays to determine the location of the image of the object produced by lens 1. Treat the image produced by lens 1 as an object for lens 2. Use the thee principal rays to determine the location of the image of this produced by..
Two girls playing catch Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 23 m/s at an angle 27 degrees; What is the speed of the ball when it leaves Sarah's hand
The coefficient of static friction is .8 between the soles ofa sprinters shoes and the level track surface she's running on. Determine the maximum acceleration she can achieve
Standing waves are set up on two strings fixed at each end, as shown in the drawing. The two strings have the same tension and mass per unit length, but they differ in length by 0.51 cm. The waves on the shorter string propagate with a speed of 41.3 ..
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