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A wire of radius 1.5 mm carries a current of 2.8 A. The potential difference between points on the wire 20 m apart is 4.7V. What are
a) the electric field in the wire and
b) the resistivity p of the material of which the wire is made?
The end of the spring is next to the 20- mark on the ruler.If a 3.0- mass is now attached to the end of the spring, where will end of the spring line up with the ruler marks?
A boy of mass 50 kg runs up a hill of vertical height 300 m in 20 minutes. calculate the work he does climbing the hill
A series R-L-C circuit is connected to a 170 Hz ac source that has Vrms=80.0 V. What average power is delivered to the circuit by the source
In the circuit shown in the figure, the 6.0 ohm resistor is consuming energy at a rate of 23.0 J/s, Find the current through the ammeter in amps
Estimate the kinetic energy of the Mars with respect to the Sun as the sum of the teerms, that sue to its daily rotation about its axis
An electron moves in the positive x-direction a distance of 2.31 m in 2.85·10-8 s, bounces off a moving proton, and then moves in the opposite direction a distance of 1.53 m in 3.33·10-8 s.
A large, flat, horixontal sheet of charge has a charge per unit area of 8.5%u03BCC/m^2. Find the electric field just above the middle of the sheet
Four charges are arranged in a rectangle with a length of 21 cm, and width of 15 cm. The charge on the top left corner is 4nC, the charge on top right corner is -3nC, the bottom right corner has a charge of 6nC, and the bottom left corner has a ch..
A rubber ball is shot straight up from the ground with speed V0. Simultaneously, a second rubber ball at height h directly above the first ball is dropped from rest
an ac power generator produces 60 a (rms) at 4000 v. the voltage is stepped up by an ideal transformer, what is the turn ratio of the transformer
A certain freely falling object requires 1.7s to travel the last 40m before it hits the ground. From what height above ground did it fall.
A dynamite blast at a quarry launches a rock straight upward, and 2.3 s later it is rising at a rate of 18 m/s, calculate blast speed at launch
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