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Question: (a) If copper has a resistivity of 1.69 x 10^-8 ohm, what is the resistance of a long copper wire of length 1 meter with a circular cross section radius of 1.0 mm? (the area of a circle r^2.)
(b) If the wire is stretched so that its volume remains the same, but the length is doubled, what is the resistance now? (Hint: rember volume = area x length, so if length doubles volume remains unchanged, what happens to the area?
He reduces his rate of rotation by extending his arms and increasing his mo ment of inertia. Find the value of his moment of inertia (in kg*m2) if his rate of rotation decreases to 0.75 rev/s
A bee ?ies to a ?ower 548 m due south of its hive. The bee's speed in still air is 0.69 m/s, and there is a wind blowing toward the south at 0.19 m/s. How long will it take the bee to travel to the ?ower and back to the hive? Answer in units of s.
A concave mirror has a focal length of 20 cm. A paraxial beam of light coming from a distant object forms its image at the focal point. compute where is the final image
Derive expressions for the Lorentz transformation equation of acceleration in the x and y directions. Do this using the Lorentz velocity transformation
Partial Fraction Expansion of a Pole-Zero Transfer Function. With the aid of MATLAB, compute the partial fraction expansion for a transfer function with zeros at -4 and -6, poles at -2 ± j and -5 ± j 4, and overall gain of unity.
A disk among vertebrae in the spine is subjected to a shearing force of 630 N. Discover its shear deformation taking it to have the shear modulus of 1*109 N/m2. The disk is equivalent to a solid cylinder 0.700 cm high and 3.70 cm in diameter.
A multicylinder gasoline engine in an airplane, operating at 2.35 103 rev/min, takes in energy 7.83 103 J and exhausts 4.57 103 J for each revolution of the crankshaft. What is the torque exerted by the crankshaft on the load?
You are standing on a sheet of ice that covers the football stadiumparking lot in Buffalo. There is negligible friction between yourfeet and the ice. with what speed do you and the ball move afterwards
Sam's speed at the bottom is 35.0. Illustrate what is the coefficient of kinetic friction of his skis on snow?
A 6.8kΩresistor has burned out in a circuit. You must replace it with another resistor with the same resistance value. If the resistor carries 10mA, what should its power rating be? Assume that you have available resistors in all the standard powe..
A motorcycle rider moving with an initial velocity of 6.8 m/s uniformly accelerates to a speed of 19.4 m/s in a distance of 30.0m. What is the acceleration? How long does it take?
Assume you wish to send a 200 bytes long message from your equipment to a friend's machine via four intermediate nodes. You are needed to use a header size of 5 bytes per packet.
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