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A 23 m long copper wire,2.00 mm in diameter including insulation, is tightly wrapped in a single layer with adjacent coils touching, to form a solenoid of diameter 2.5 cm.
(a) What is the length of the solenoid and
m
(b) What is the field at the center when the current in the wire is 20 A?
T
Two small metal spheres with masses 2.0 {rm g} and 4.0 {rm g} are tied together by a 5.3-{rm cm}-long massless string and are at rest on a frictionless surface. Each is charged to +2.3 mu C. What is the energy.
Evaluate the electrostatic energy of two opposite charges
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What must your average speed over the next 10 miles be to have your average speed for the total 20 miles be 13m/h? c)Given this average speed for the first 10 miles, can you possibly attain an average speed of 14for the total 20-mile ride?
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