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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 80 kg crate is resting on a rough horizontal surface. the coefficient of static friction is 0.5 between the surface and the crate. how much force is required to start the crate moving
X-rays with a wavelength of 7.02 x 10^-12 m strike a stationary electron and the reflected photon is scattered 75 degrees relative to the incident photon
You have 11 meter of 0.60 millimeter diameter copper wire and a power supply capable of passing 25Amp through the wire. Find what magnetic field strength would you obtain
When light of wavelength 350 nm falls on a potassium surface, electrons are emitted having a maximum kinetic energy when the stopping voltage, Vs = 1.30 V. Find Work function of potassium and The cut-off wavelength.
The drawing shows a wire composed of three segments, AB, BC, andCD. There is a current of I = 2.9A in the wire. There is also a magneticfield B (magnitude= 0.24 T) that is the same everywhere and pointsin the direction of +z axis.
An object in equilibrimhas three forces exerted on it. A 33N force acts at 90 degrees and a 44N force acts at 60 degrees. What is the magnitude and direction of the third force?
a point charge of 8.00 uc is located on the x-axis at x 4.00 m next to a spherical surface of radius x 3.00 m centered
A ball moving at 5.10 m/s strikes a stationary ball of the same mass. Calculate the velocity of the second ball after collision
a 5-microf capacitor is charged to 30 v and is then connected across a 10-microh inductor. the frequency of oscillation
A damped mass-spring system oscillates at 265 -Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 6.1 cm and the energy of the oscillating system is then 61.00 J.
Calculate the specific heat of a metal from the following data. A container made of the metal has a mass of 3.3 kg and contains 15 kg of water. A 1.0 kg piece of the metal initially at a temperature of 170°C is dropped into the water
in a television tube electrons initially at rest are accelerated by a uniform electric field of magnitude 4.0 times 105
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