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Find how much time does it take an electron traveling at the drift velocity to transverse the 2 centimeter long tungsten filament that has a radius of 0.1 millimeter? Suppose that the density of electrons in tungsten is 8.0 x 10^28 m^-3?
The spring stretches 5.0 cm from its previous equilibrium position toward the two spheres. Calculate the spring constant.
The pilot of an airplane notes that the compass indicates a heading due west. The plane's speed relative to the air is 150 km/h. Find the velocity of the airplane relative to the ground
For the two conducting balls as described in problem 1, when one ball is attached to a torsion balance the wire is twisted by a torsional angle of 1°. find the torsion constant of the wire
Two campers carry their gear (90.7kg) on a light, rigid horizontal pole whose ends they support on their shoulders 1.83m apart. If Holly experiences a compressive force of 534N, what force will Rocky feel? (b) Where is the load hung on the pole (gau..
An 85.1 kg base runner begins his slide into second base while moving at a speed of 5.9 m/s. The coefficient of kinetic friction between his clothes and ground is 0.68. He slides so that he comes to rest just as he reaches the base.
A mass M is split into two parts, m and M - m, which are then separated by a certain distance. What ratio m/M gives the least gravitational potential energy for the system?
A freely falling object requires 1.20s to travel the last 33.0 m before ithits the ground. From what height above the ground did it fall
A copper wire of radius a = 0.235 mm has an aluminum jacket of outer radius b = 0.302 mm. There is a current i = 1.56 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 x 10-8?·m and 2.75 x 10-8?·m. Calculate the current..
On another planet the simple pendulum consisting of a 0.154 kg mass suspended on a 1.20 m long string has a period of 3.860 seconds. What is acceleration on this planet.
Find the range of wavelengths seen in the hydrogen emission spectrum in the Brackett series. Find the shortest wavelength in the Brackett series
A long solid cylindrical wire of radius 0.01 meters carries a current whose density (current per unit area) is given by J=0.02r^2.
A model rocket is fired vertically from rest. It has a net acceleration of 17.0 m/s2. How long after liftoff does the rocket return to the ground
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