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A 1.60 cylindrical rod of diameter 0.550 is connected to a power supply that maintains a constant potential difference of 15.0 across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0 ) the ammeter reads 18.3 , while at 92.0 it reads 17.4 . You can ignore any thermal expansion of the rod.
Find the temperature coefficient of resistivity at 20 for the material of the rod.
A monatomic ideal gas at high temperature T in a discharge tube has a triply degenerate excited state at an energy e above the ground state, Find the ratio population of the excited state to that of the ground state
A 260 wooden raft floats on a lake. When an 80 man stands on the raft, it sinks 5.0 deeper into the water. When he steps off, the raft vibrates for a while. What is the frequency of vibration.
Two tug boats are towing a ship. Each exerts a horizontal force of 5 tons, What net force is exerted on the ship
Two equal positive charges of magnitude q1 = q2 = 5.5 nC are on the y axis at y1 = +3 cm and y2 = -3 cm. What is the force exerted on a third charge q0 = 4 nC when it is placed on the x axis at x = 2 cm
A cannon ball is fired at a wall located 450 meters away. The initial horizontal component of the balls velocity is 90 m/s and it's initial angle is 24 degrees. How long does it take for the ball to reach the wall
A gamma ray photon produces an electron-positron pair each with a kinetic energy of 210 KeV. What was the energy and wavelength of the photon
A student standing on the ground throws a ball straight up. How long is the ball in the air before it hits the ground
one atmospheric pressure corresponds to the height of 0.76 m hg column in a barometer. if water is used instead of hg
Two charged particles, q1 = ?2.50×10?3 C and q2 = +3.850e-3 C, are separated by a distance of 5.00 cm. What is the electric potential energy of this configuration
A thin 11-cm-long solenoid has a total of 440 turns of wire and carries a current of 1.9A, Calculate the field inside the solenoid near the center
Physics: How much time is required to row cross the river? How wide is the river?, A river man can row his boat at a speed of 2.5 m/s through still water. He wants to row directly across a river that has a current flowing at 1.5m/s
A silt of width a is illuminated bymonochromatic light of wavelength 650nm at normal incidence. Calculate the value of a , when the first minimum falls at an angle of diffracction 30 degree
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