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A certain resistor is made with a 53.0 mlength of fine copper wire, 4.76*10-2 mm in diameter, wound onto acylindrical form and having a fiber insulator separating the coils.Calculate the resistance. (The resistivity of copper is1.72*10-8 Ω-m.)
A refrigerator has a coefficient of performance of 7.9. How much heat in joules is exhausted to the hot reservoir when 209 J are removed from the cold reservoir?
Calculate the smallest possible volume of a 1 F capacitor using dielectric Teflon (2.1K), and a plate thickness of 0.01 mm. Any dimension for A and d, so long as they are physically reasonable?
Find the magnetic flux through a circular loop 4.6 cm in diameter oriented with the loop normal at 58 degrees to a uniform 80 mT magnetic field
a. calculate the launch speed of a projectile that rises vertically above the earth to an altitude equal to one earth
a rocket takes off at an angle of 20deg from vertical. two observers are standing 20 miles away from the lunch site so
A 40.0 m long uniform bridge span weighs 6.00 x 104N. What force do the bridge and the car exert on the left pier
Three forces acting on an object are given by f1 = (?2.05i + 6.30j) N, f2 = (4.70i ? 1.95j) N, and f3 = (?42.5) N. What is the direction of the acceleration
A copper beaker of mass 0.20 kg contains 0.10 kg of water at 20.0degree C. A block of silver of mass 100 g at 90.0 degree C is added to the beaker of water. The entire system is thermally insulated from the surroundings, (specific heats- copper: 3..
a clump of soft clay is thrown horizontally from 8.50 m above ground with a speed of of 20.00 ms. where is the clay
A boy of mass 54.7 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.3 m/s. Find the final velocity of the skateboard
Three blocks with masses m1=5kg, m2=10kg and m3=7kg are connected by two pieces of very light strings. Find the tensions in both pieces of string
A 70.0 kg skier with an initial speed of 13.0 m/s coasts up a 2.50 m high rise as shown in Figure 6.23. Find his final speed at the top
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