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Aluminium has a valency of 3, a density of 2.70 g cm 3, and an atomic mass of 27 g mol 1. The resistivity of aluminium at 25 has been measured to be 2:72 10 8 m.
(a). Estimate the mean free time between collisions for the conduction electrons in aluminum at 25 , and hence estimate their drift mobility.
(b). If the mean speed of the conduction electrons is about 2 106 m s 1, calculate the mean free path.
q1. an elevator cable can withstand a maximum tension of 19500n before breaking. the elevator has a mass of 480 kg and
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Calculate what speed a neutron would need to have to be suitable for this task ,to have a de Broglie wavelength equal to the distance between the two atoms.
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Two point charges are fixed in space along the x-axis. The first charge of 3.8 µC is located at x = - 4.5 cm, while the second charge of -5.6 µC is located at x = 3.5 cm. Where must a third charge (with charge 1 µC) be placed on the x-axis therefore ..
What is the speed parameter of S', and (b) is S' moving in the positive or negative direction of the x axis? To S', (c) which flash occurs first and (d) what is the time interval between the flashes?
A charging bull elephant with a mass of 5240 kg comes directly toward you with a speed of 4.55m/s. You toss a 0.150 kg rubber ballat the elephant with a speed of 7.81 m/s.
The straight lines below represent parallel equipotential planes. Which region has the highest electric field strength
a soccer player can kick the ball 24m on level ground with its initial velocity at 45 degrees to the horizontal. at the
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