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A large spool in an electrician's workshop has 85 m of insulation-coated wire coiled around it. When the electrician connects a battery to the ends of the spooled wire, the resulting current is 1.9 A. Some weeks later, after cutting off various lengths of wire for use in repairs, the electrician finds that the spooled wire carries a 2.9-A current when the same battery is connected to it. What is the length of wire remaining on the spool?
A 1.5V battery has an internal resistance of .5 Ohm. If a light bulb with cold resistance of 10 Ohm is placed in a series with the battery, how much current initially flows in the circuit
A transformer has 5.00 E4 turns in its primary coil and 7.00 E3 turns in its secondary coil. find the rms current in the primary coil
An oak barrel with a lid of area 0.20 m2 is filled withwater. A long, thin tube of cross-sectional area 5.0 X10-5 m2 is inserted into a hole at the centerof the lid, and water is poured into the tube. When the waterreaches 12 m high, the barrel bu..
Kim says that she was less than 10 ft away from the president when she took a picture of him with her 53-mm focal length camera lens. How close was Kim to the president when she took the picture
A Carnot engine absorbs 950J of heat each cycle and provides 340J of work. How much heat is rejected each cycle
An electromagnetic wave with a frequency of 7.20×10^14Hz propagates with a speed of 2.30×10^8m/s in a certain piece of glass. Find the dielectric constant for glass at this frequency
A ball is shot from the ground into the air. At a height of 8.6 m, the velocity is observed to be v = (8.1)i + (5.3)j in meters per second (i horizontal, j upward). To what maximum height will the ball rise
When a high-speed passenger train traveling atvP = 55 m/s rounds a bend, theengineer is shocked to see that a locomotive has improperly enteredonto the track from a siding and is a distance D =1000 m ahead (see figure). The locomotive is moving at..
An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff
A baseball approaches home plate at a speed of 48.0 m/s, moving horizontally just before being hit by a bat. What is force on bat
question1a sailboat is being propelled westerly by the wind at 4ms. if the current is flowing 2ms to the northeast
At the end of a race a runner decelerates from a velocity of 8.00 m/s at a rate of 0.300 m/s2. What is her final velocity
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