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Question: Learning Goal: To learn to apply the concept of current density and microscopic Ohm's law.
A slab of metal of volume V is made into a rod of length L . The rod carries current I when the electric field inside is E.
A) Find the resistivity of the metal P.
B) The rod is now stretched so that its length is doubled. If the electric field remains the same, what is the new current I' in the rod?
C) A piece of copper is made into a rod with a square cross-section. The side of the square is 2.00 centimeters. The resistivity of copper is 1.7 *10^-8 om*m. . An unknown electric field E, directed along the rod, creates a current of 12.0 amperes through the rod. Find the magnitude of E.
A block rests on a horizontal surface, and the coefficient of static friction between the block, Find the frequency at which the block begins to slide on the surface
a football is punted with an initial velocity of 26.1 ms and an initial angle of 53.1o. what is its hang time the time
Illustrate what are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice.
Refer to the Hose Skiving case of in the Chap. 1 exercises. The plant works two shifts/day. Five hoses were sampled every two hours from each of three.
On planet Tehar, the free-fall acceleration is the same as that on Earth, however there is also a strong downward electric field that is uniform close to the planet's surface. A 2.00 kg ball having a charge of 5.00 µC is thrown upward at a speed of 2..
List out five to ten specific things that project managers can do to help manage stakeholders. Provide some examples of successful and unsuccessful relationships with project stakeholders.
most species of fish have expandable sacs commonly known as swim bladders that enable fish to rise in the water by
A proton (charge e = + 1.60 x 10-19 C, mass m =1.67 x 10-27 kilogram) accelerates from rest by crossing a potential difference V = 3.00 Volt, Compute the distance rmin between the proton and the ion at the moment of closest approach
What is the magnitude of the normal force that each brake pad applies to the rim . find the length of the meterstick as measured in frame S1 according to classical physics. Reply in units of m.
A catapult with a radial arm 4.19 m long accelerates a ball of mass 19.1 kg through a quarter circle. The ball leaves the apparatus at 41.6 m/s. Find the moment of inertia of the arm and ball
The electric potential of a very large isolated flat metal plate isV0. It carries a uniform distribution of charge of surface density σ (C/m2), or σ/2 on each surface. Decide V at a distance x from the plate. Think about point x to be far from teh ed..
A 0.550 kilogram block slides on a frictionless horizontal surface with a speed of 1.10 m/s. Obtain what is the force constant of this spring
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