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A parallel plate capacitor without a dielectric inserted is connected to a battery. The energy density is 5 J/m3 initially. While still connected to the battery, the plates are move closer by a factor of 3.6. Then, the wires are removed from the plates and the distance between the plates is increased by factor of 3.0. After this a dielectric with a dielectric constant of 1.6 is inserted between the sheets. What is the energy density in this final configuration in J/m3?
If the relativistic kinetic energy of a particle is 9 times its rest energy, at what fraction of the speed of light must the particle be travelling
A thin rod of length 0.89 m and mass 110 g is suspended freely from one end. It is pulled to one side and then allowed to swing like a pendulum, how far above that position the center of mass rises
A 40 kg crate is being lowered by means of rope. Its downward acceleration is 2.00 m/s^2. What is the magnitude of the force exerted by the rope on the crate
Extend the previous exercise to estimate the position and width of the lowest band in a superlattice of alternating 5 nm wells and 5 nm barriers of height 0.3 eV in GaAs. A numerical calculation puts the edges of the bands at -0.215 eV and -0.205 ..
in a series rlc ac circuit the resistance is 33 ? the inductance is 31 mh and the capacitance is 19 microf. the
Business to business or business to consumer sector
The springs of a 1400 kg car compress 6.0 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations.
A current of 0.14 A is maintainedin a rectangular loop of wire lying flat on a table top. what is the magnitude of the total magnetic force on the wire loop
The near point of a naked eye is 30 cm. When an object is placed at the near point and viewed by the naked eye, it has an angular size of 0.062 rad. A magnifying glass has a focal length of 17 cm, and is held next to the eye.
When it rains, the coefficient of static friction is reduced to one-half of that on the dry road surface.
a man drives a car at a speed of 20 m/s off 30 m high cliff. the road leading to the cliff is inclined upward at angle of 20 degrees. how far from the base of the cliff the car land
A flywheel is rotating with an initial speed of 2.7 rad/s. Is accelerates at a rate of 14.5 rad/s^2 until it reaches 23.9 rad/s. How any revolutions did it make while it accelerated
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