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The current in a coil with a self-inductance of 1 mH is 3.0 A at t = 0, when the coil is shorted through a resistor. The total resistance of the coil plus the resistor is 9.0 Ohms. (a) Find the current after 0.5 ms and (b.) after 10 ms.
The Hall effect can be used to determine the density of mobile electrons in a conductor. Find the density of mobile electrons in the material
if a 0.5kg cart and a 2.0 kg cart is attached and are rolling forward with a speed of 2.0 m/s. what are the speed and direction of the larger cart
A loaded ore car has a mass of 950 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch, What maximum power must the motor provide
A satellite weighing 500 kg is in a circular orbit around the earth. It takes exactly 3 hour to go around the earth, What is the force of gravity on this satellite
A 23.2-mW laser beam of diameter 2.18 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
A homer run is hit in such a way that the baseball just clears a wall 14m high, located 122m from home plate. find the speed of the ball when it reaches the wall
a supertanker with the mass of 3.34^7 kg is moving with a constant velocity .its engines generate a forword thurst of 5.38x10^5 n. determine the magnitude of the upward buoyant force exerted on the tanker by the water
What would be the equilibrium temperature when a 253-g block of copper at 281^circ C is placed in a 137g aluminium calorimeter cup containing 817-g of water at 14.5^circ C.
The drawings show three charges that have the same magnitude but different signs. In all cases the distance d between thecharges is the same. The magnitude of the charges is|q|=8.8 μC, and the distance between them isd=6.2 mm. Determine the magnitude..
A small conductive rod of length 1.4 m moves with a constant velocity v=20 m/s in a direction parallel to a long wire carrying a current of 32 A. Calculate the electric potential induced across the rod
A transmission diffraction grating 420 lines/mm is used to study the light intensity of different orders (n). A screen is located 2.5m from the grating. What is the separation on the screen between the three brightest red lines for a hydrogen source?
A 20.0 kg wood ball hangs from a 1.3 m long wire. The maximum tension the wire can withstand without breaking is 300 N. A 0.70 kg projectile travelling horizontally hits and embeds itself in the wood ball.
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