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Question: At t = 0, charge density ρv0 was introduced into the interior of a material with a relative permittivity εr = 9. If at t = 1 μs the charge density has dissipated down to 10-3ρv0, what is the conductivity of the material?
What is current in the coil
After the first spring compresses a distance of 33cm, second spring acts with the first to increase the force as additional compression occurs. The car comes to rest 53.0 cm after first contacting the two-spring system. Find the car's initial spee..
Sunlight reflects the surface of a swimming pool. At what angle the reflected light is 100% polarized
A Ge semiconductor has a gap of 0.7 eV between the valence and conduction band. What fraction of the electrons are in the conduction band
a tin can is filled with water to a depth of 39 cm. a hole 18 cm above the bottom of the can produces a stream of water
A small sphere with mass 9.00 ?g and charge ?4.30?C is moving in a circular orbit around a stationary sphere that has charge +7.50?C. what is the radius of its orbit
Yellow light of vacuum wavelength 589 nm travels at 1.942 x108 m/s through quartz. Quartz is a nonmagneticdielectric. Calculate its permittivity. Find the electric field amplitude of a linearly-polarizedelectromagnetic wave of intensity 12.0 GW/m2..
A stroboscope is a light that flashes on and off at a constantrate. It can be used to illuminate a rotating object, what is the next shortest time interval
The potential difference among two parallel conducting plates in vacuum is 550 V. An alpha particle with charge of 3.20×10-19 C and mass of 6.50×10-27 kg is released from rest near the positive plate. What is the kinetic energy of the alpha particle ..
The emissivity of the outer surface of the tank is 0.75, and the convection heat transfer coefficient on the outer surface can be taken to be 30 W/m2 · °C. Assume the average surrounding surface temperature for radiation exchange to be 15°C.
Shows a F = 6.8 N force pushing two gliders along an air track. The 220 g spring between the gliders is compressed. Assume the force F acts and the whole system moves in the same direction. The spring does not sag. How much force does the spring e..
An infant's pulse rate is measured to be 156 ± 4 beats per minute. What is the percent uncertainty in this measurement? (Note that percent uncertainties should be reported to two significant figures.)
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