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A top is a toy that is made to spin on its pointed end by pullingon a string wrapped around the body of the top. The string has alength of 56 cm and is wound around thetop at a spot where its radius is 1.2 cm.The thickness of the string is negligible. The top is initially atrest. Someone pulls the free end of the string, thereby unwindingit and giving the top an angular acceleration of 15 rad/s2. What is the final angularvelocity of the top when the string is completely unwound?
Suppose in the drawing that I1 = I2 = 13.6 A and that the separation between the wires is 0.0244 m. What is the magnitude of the external field
If a student with relaxed "normal" eye finds a magnifying glass with a focal length of 78 mm, What is the magnification of this magnifying glass
In a circus performance, a monkey is strapped to a sled andboth are given an initial speed of 3.0m/s up a 18.0° inclined track. How far up the incline do the monkey and sled move
A series DC circuit contains a 4mH inductor and an 80 ohm resistor in series with a 12V battery. What is the time constant for the circuit? What are the initial and final currents?
The resistance of a copper wire of length L meter is 0.1 ohms. If the diameter of the wire is 0.045cm, find out its specific resistance.
Mercury is poured into a U-tube as shown in Figure (a). The left arm of the tube has cross-sectional area A1 of 11.0 cm2, and the right arm has a cross-sectional area A2 of 4.60 cm2.
A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, What current is induced in the square coil
A long solenoid consists of 1600 turns and has a length of 0.55 m.The current in the wire is 0.41 A. What is the magnitude of the magnetic field inside the solenoid?
You push your physics book 1.70 m along a horizontal tabletop with a horizontal push of 2.60 N while the opposing force of friction 0.750 N. How much work does gravity do on the book
A 4mm diameter circular coil of 25 turns and total resistance 0.001O lies in the x-y plane at a distance of 3m from a long straight current-carrying wire along the x-axis. If the current in the wire is increasing at a rate of 0.2 A/s,
As part of a carnival game, a 0.503-kg ball is thrown at a stack of 15.8-cm tall, 0.383-kg objects and hits with a perfectly horizontal velocity of 10.8 m/s. what is the moment of inertia of the object
An object of mass m=2.5kg is moving along a straightroad in a direction pointing 18o north of east. A forcewhose magnitude is 47.0N, pointing 55o to the West ofSouth acts on the object. What is the magnitude of the parallel andvertical components of ..
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