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Solve the following questions:
Question I: How many excess electrons must be distributed uniformly within the volume of an isolated plastic sphere 24.0cm in diameter to produce an electric field of 1200N/C just outside the surface of the sphere?
Question II: What is the electric field at a point 12.0cm outside the surface of the sphere?
I am having a hard time understanding these questions. So if you answer please explain how you found the answers.
An underwater scuba diver sees the Sun at an apparent angle of28.0° from the vertical. What is actual direction of the Sun
A 22 g dried sample of food is placed in an aluminum bomb calorimeter and burned completely. The device consists of an aluminum chamber (0.50 kg) containing the sample, how many kilocalories did the food make available
When a certain spring is stretched by an amount x, it produces a restoring force of F(x) = ax=bx^2, where a and b are constants. How much work is done through an external force in stretching the spring by an amount D from its equilibrium length.
A coil of Nichrome wire is 27.0 m long. The wire has a diameter of 0.440 mm and is at 20.0°C. If it carries a current of 0.460 A and what is the magnitude of the electric field in the wire?
After falling from rest from a height of 31 m, a 0.51-kg ball rebounds upward, reaching a height of 21 m. what average force was exerted on the ball
q1. a wheel 45.0 cm in diameter accelerates uniformly from 206rpm to 340 rpm in 7.0 s. how far will a point on edge of
a point source of light illuminates an aperture 4.00 away. a 18.0 -wide bright patch of light appears on a screen 2.00
Calculate the pressure exerted on the skin by an acupuncture needle of radius 0.100 mm applied with a force of 4.40 N
A guitar's E-string has length 64.9 cm and is stretched to a tension 84.6 N. It vibrates a fundamental frequency of 329.59 Hz. Determine the mass per unit length of the string
Two people wish to push a big beer freezer weighing 2000 N up a ramp inclined at an angle of 37.0o with the horizontal. what average force does it exert on the heavy object
Local noon at 0o longitude corresponds to 12:00UTC. a) Given that our longitude is 84o 28' 33'' W, what is our local noontime in UTC? (b) What local time would this correspond to today? (c) From this and your estimate of the sun's current hour angle,..
A penny is located at the outer edge of a disk (radius = 0.129 meter) that rotates about an axis perpendicular to the plane of the disk at its center. Obtain the minimum coefficient of friction necessary to allow the penny to rotate along with the ..
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