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A student makes an inductor in lab by wrapping many turns of fine copper wire around a spool. a real inductor coil such as this will have some internal resistance as well as inductance.
The student measures L as follows. The coil is connected across a 6V DC battery and a current of 0.5 amps is obtained. then the coil is connected across a 24V rms source oscilating at 60 Hz and current of 0.8 A rms is measured. What is L?
A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance d = 6.80 cm from its unstretched position when the system is in equilibrium, determine the mass of the object
Unpolarized light whose intensity is 1.90 W/m2 is incident on the polarizer in the figure. What is the intensity of the light leaving the polarizer?
Mark pushes his broken car 150m down the block to his friend's house. He has to exert a 110N force to push the car at a constant speed. How much Thermal Energy is created
A soccer ball is kicked with an initial speed of 28 m/s at an angle of 22° with respect to the horizontal. Find the maximum height reached by the ball
The combination of an applied force and a constant frictional force produces a constant torque of 35.8 N•m on a wheel rotating about a fixed axis. Determine the moment of inertia of the wheel
Find positions of four charges in a plane (+1C, -1C, +2C, -2C) that result in an equilibrium (zero net force on each charge). Report positions as four (x,y) pairs.
consider a thin wire bent into the shape of a ring of radius of 10 cm that carries a steady 2.0-A current
a child does 350 J of work while pulling a box from the ground up to his tree house with a rope the tree house is 8.4 m above the ground
A high-speed flywheel in a motor is spinning at 450 when a power failure suddenly occurs. The flywheel has mass 38.0 and diameter 78 . The power is off for 25 and during this time the flywheel slows due to friction in its axle bearings.
a an ambulance leaves the police station in big city and travels 7 blocks north then 7 blocks east to pick up a
An insulated beaker by negligible mass contains liquid water by a mass of 0.315kg and a temperature of 65.8C. How much ice at a temperature of -15.0C should be dropped into the water so that the final temperature of the system will be 28.0C?
Visitors at a science museum are invited to sit in a chair tothe right of a full-length diverging lens (f1 = -2.60 m)and observe a friend sitting in a second chair, 1.90 m to the leftof the lens. The visitor then presses a button and a converginglen..
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