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an electrical current of 8.70 mA exists in a solid cylindrical wire whose diameter is 1.20 mm. calculate the magnitude of the current density in the wire. Assume that electrons are the charge carriers and the conduction electron density is 2.35 x 10^23/ m^3. then calculate the electron drift speed in the wire.
Calculate the ground state energy and corresponding speed of a particle of mass 1.0 g in a box of length L=10.0 cm assuming the particle in a box model. Compare these quantities with those of an electron in a box of length 1.0 ..
Find the velocities of the balls just after their collision and How high will the balls rise after collision?
One possible means of achieving space flight is to place a perfectly reflecting aluminized sheet into Earth 's orbit and to use the light from the Sun to push this solar sail, What force is exerted on the sail
An object is 20 cm to the left of a thin diverging lens having a 10 cm focal length. Find the image position with a ray diagram
A car is traveling along a straight road at a velocity of +39.0 m/s when its engine cuts out. For the next ten seconds the car slows down, Find the velocity of the car at the end of the initial ten-second interval
You swing an object in a vertical circle of radius 0.880m. What is the mass of the object
A 150-kg (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1680 N, Find the acceleration of the rocket
A ball is thrown vertically upward by an initial speed of 11 m/s. One second later, a stone is thrown vertically upward with an initial speed of 25 m/s. Discover the time it takes the stone to catch up with the ball.
Calculate the low calorific power of methane CH4 with air at 298 K, assuming that the products of reaction are CO2 and H2O(gas)
A point source of light is at the bottom of a koi pond, at a depth of 0.525 meters. What is the radius of the circle of light formed on the water's surface
A bullet of mass mB = 0.0149 kg is moving with a speed of 102 m/s when it collides with a rod of mass mR = 7.85 kg and length L= 1.08 m, How much kinetic energy is lost in the collision
calculate the ratio of the intensities at the maximum and minimum .
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