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A solenoid has a cross-sectional area of 5.60 x 10-4 m2,consists of 500 turns per meter, andcarries a current of 0.4 A. A 10 turncoil is wrapped tightly around the circumference of the solenoid.The ends of the coil are connected to a 2.2 Ω resistor. Suddenly, a switch is opened,and the current in the solenoid dies to zero in a time of0.05 s. Find the average current induced in the coil.
A rescue helicopter is lifting a man (weight = 719 N) from a capsized boat by means of a cable and harness, What is the tension during the remainder of the rescue when he is pulled upward at a constant velocity
A toy car of mass 1.0 kg is stationary, and a child rolls a toy truck of mass 4.7 kg straight toward it with a speed of 3.2 m/s. What is the velocity of the center of mass of the system consisting of the two toys
Three identical boxcars are coupled together and are moving at a constant speed of 28.0 on a level, frictionless track. What is the speed of the four cars
A coil of inductance 70 mH and unknown resistance and a 0.85 µF capacitor are connected in series with an alternating emf of frequency 980 Hz. what is the resistance of the coil
Five thousand joules of heat is put into a Carnot engine whosehot and cold reservoirs have temperatures of 540 and 200 K, How much heat is converted into work
a 37-strand transmission cable is to provide power to 68000 homes each of which consumes 1188 kwhr per month. the cable
To start a mower, a person must pull on a string attached to a pulley with a force of 70N. The pulley is a disc of mass 0.1kg and radius 0.1m. Calculate the angular acceleration of the pulley
A person is losing thermal energy through the skin at a rate of 120 W when his skin temperature is 30°C. find At what rate is he now losing thermal energy
A 1600kg car takes a 50-m-radius unbanked curve at 17m/s, What is the size of the friction force on the car
It is believed that a large electric fish known as Torpedo occidentalis uses electricity to shock its victims. What is the rate at which this work is done by the electric organs during a pulse
a proton moves at a speed of 1605 ms in a direction perpendicular to a magnetic field with a magnitude of 0.58 t. if
Black smokers are hot volcanic vents that emit smoke deep in the ocean floor. Many of them teem with exotic creatures, and some biologists think that life on earth may have begun around such vents.
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