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Three identical small Styrofoam balls (m = 1.82 g) are suspended from a fixed point by three nonconducting threads, each with a length of 47.1 cm and with negligible mass. At equilibrium the three balls form an equilateral triangle with sides of 31.0 cm. What is the common charge q carried by each ball?
During the time a compact disc(CD) accelerates from rest to a constant rotational speed of 1260rev/min, what is the angular acceleration of the CD
In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 45.9 m/s in a time of 8.93 s. Find the average net force exerted on the car and riders by the magnets
In state-of-the-art vacuum systems, pressures as low as 1.00 10-9 Pa are being attained. Calculate the number of molecules in a 1.80-m3 vessel
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 47.0cm . The explorer finds that the pendulum completes 110 full swing cycles in a time of 145s A. What is the magnitude of the gravitational acceleration ..
The coefficient of static and kinetic frictions between a 3.0-kg box and a desk are 0.40 and 0.30, respectively. What is the net force on the box
A vertical straight wire carrying an upward 24-A current exerts an attractive force per unit length of 8.8 *10-4 N/m on a second parallel wire 7.0cm away. What current (magnitude and direction) flows in the second wire?
Approximately how much electricity is generated from nuclear power each year in the US? Given the average fuel burnup above, What is the energy input for enrichment (via centrifuge method) as a fraction of the electricity generated by the fuel produc..
A copy of The History of the Decline and Fall of the Roman Empire by Edward Gibbon lies exactly in the middle of an otherwise empty 6.1m long bookshelf in Robarts Library. What is the speed at which the librarian raised the shelf
A string is wound around a metal wheel that is free to spin on a frictionless pivot. A hanging mass is connected to the other end of the string, What is the initial velocity of the hanging mass
In a TV-show, an inexperienced doctor touches the electrodes of a defibrillator and gets thrown across the room, what is the maximum height above ground he could reach
In building a particle accelerator, you manage to produce a uniform electric field of magnitude 4.03 × 105 N/C in one 40.5 cm section. How much work is required to move a proton through the section
A Step-Up transformer with 60 Hz AC power has an input voltage of 1000 V at a current of 2 Amperes, What is the current flowing out of the transformer
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