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A wire has a current density of 18 A/mm2. If the drift velocity is 5.0×10-8 m/s, how many free electrons does the wire have in a 1.0 m length? The radius of the wire is 1.0 mm.
A)7.1*10^27B)2.3*10^33C)2.3*10^27D)7.1*10^21
A cross section of an infinite conducting sheet carrying a current per unit x-length of λ; the current emerges perpendicularly out of the page
A roller coaster (370 kg) moves from A (5.00 m above the ground) to B (25.0 m above the ground). What is the change in the car's kinetic energy
The average resistivity of the human body is 5 ohm*m. The conducting path between two hands is approximated as a cylinder with length 1.6m, what is the resistance between the hands
If a curve with a radius of 85 is perfectly banked for a car traveling 71 , what should be the coefficient of static friction for a car not to skid when traveling at 86.
Half-life of C^14 is 5730 yr. Find its decay constant. If we have 4.8X10^14 atoms of C^14, after 10000yr. How many of them will be left
When water is boiled under a pressure of 2.00 atm, the heat ofvaporization is 2.20 x 10^6 J/kg and the boling point is 120Degrees C. Compute the increase in internal energy of the water
How far from the dog would the suitcase land? You can ignore air resistance.
The loaded cab of an elevator has a mass of 3.0 x 10^3 kg and moves 145 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab.
q1. a 1720 kg car is travelling with a speed of 15.0 ms. what is the magnitude of the horizontal net force that is
A 120 V potential difference is applied to a space heater whose resistance is 19 ? when hot. At what rate is electrical energy transferred to heat
The Paschen series in the hydrogen emission spectrum is formed by electron transitions from ni > 3 to nf = 3. What is the longest wavelength in the Paschen series
A 25 gram mass is placed on the edge of a turntable witha 15 cm radius. Find the rotational speed of the turntable
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