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The current-density magnitude in a certain circular wire is J = (2.60 × 1010 A/m4)r2, where r is the radial distance out to the wire's radius of 3.00 mm. The potential applied to the wire (end to end) is 55.0 V. How much energy is converted to thermal energy in 1.40 h?
a ball rolls down a 100m.the hill is inclined at 60 degrees. if the ball has a rotational inertia of 10kg-m^2 and starts from rest, what is the final rotational speed of the ball?(you must use the conservation of energy)
a 25.0 mH inductor is in an AC-circuit with a 150 V ac-source which operates at 60.0Hz. find the inductive reactance
A simple pendulum is made of a small blob of mass m = 9.500 kg attached to the end of an inextensible wire. find the magnitude of the tension in the wire
A basketball of mass 610g and circumference 76cm is rolling without slipping on a gym floor. Treating ball as a hollow sphere, what fraction of its total kinetic energy is associated with its rotational motion.
Young David who slew Goliath experimented with slings before tackling the giant. He found that he could revolve a sling of length 0.650 m at the rate of 9.00 rev/s. What is the speed of the stone for each rate of rotation
A 1000-kilogram race car is traveling at 60 m/s around a curved section of track that has a radius of 300 m. What is the centripetal force that acts on the car
q1. what are sunspots and how are they related to suns magnetic field? is a magnetic field stronger weaker in sunspots?
An electronic attachment for camera produces flash by usingenergy stored in 880&10-6 F of capacitor, Determine the value of resistance
1. A modern-day zeppelin holds 8,280 m3 of helium, Compute its maximum payload at sea level
Two wires are parallel (heading north-south). The current in each wire is northward. What is the direction of the magnetic field at the location of the right-hand wire due to the current in the left-hand wire? What is the direction of the magnetic fo..
A vertical spring has one end attached to the ceiling and a 2.50-kg fish attached to the other one. find how fast the fish is moving after it drops 20.0 cm
a 4.0 kilogram cart moving to the right and a 6.0 kilogram cart moving to the left on a horizontal frictionless
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