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Question1
In the Relativistic Heavy Ion Collider in Brookhaven, NY, physicists are attempt to rebuild the conditions of the Big Bang by colliding extremely massive, highly-charged ions together. In this collider, gold atoms (atomic number 79) are accelerated until all electrons have been stripped from nucleus, thereby producing a particle with a charge of +79e. These nuclei are accelerated to a major fraction of the speed of light, until ultimately one gold nucleus is passing through the collider every thousandth of a second. What is current flowing through the collider?
Question2
A long straight wire 1 lies along x-axis. A long straight wire 2 lies along the y-axis so as to pass very near, but not quite touch wire 1 at the origin. After viewed from above, two wires form a cross.
If both wires are free to move, what happens when currents are sent at the same time in the +x direction through wire 1 and in the +y direction through wire 2? Note that “clockwise around origin” refers to an observer looking down on a xy plane in which +x is to right and +y upward.
A 45.2-kg girl is standing on a 143-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, What is the girls velocity relative to the ice surface
The sinusoidal wave is traveling in the positive x-direction and has a frequency of 21.4 Hz. The wavelength is 10.4 cm, the amplitude is 4.13 cm, and the period is 0.047 seconds. What is the wave's speed?
A 3.80 m-long, 430 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66.0 kg construction worker stands at the far end of the beam. What is the magnitude of torque abou..
An electric field is set up between two parallel plates, each of area 2.2 m2, by putting 1.0 C charge on one plate and the -1.0 C charge on the other. The plates are separated by 4.0 mm. What is the magnitude of the electric field between the plates ..
A mercury thermometer is constructed as shown below. Find the change in height of the mercury column that occurs with a temperature change of 24.0°C
What is the thinnest film of MgF2 n=1.39 on glass that produces a strong reflection for orange light with a wavelength of 600 nm.
In open heart surgery a much smaller amount of energy will defibrillate the heart, What voltage is applied to the 9.00 µF capacitor of a heart defibrillator that stores 55.0 J of energy
An athlete swings a ball, connected to the end of a chain, in a horizontal circle. Which rate of rotation gives the greater speed for the ball
An 82 kg lumberjack stands at one end of a 355 kg floating log. Both the log and the lumberjack are at rest initially. If the lumberjack now trots toward the other end of the log with a speed of 2.70 m/s relative to the log, what is the lumberjack's ..
A sledge loaded with bricks has a total mass of 17.9 kg and is pulled at constant speed by a rope inclined at 20.3° above the horizontal. What is the mechanical energy lost due to friction
Determine the mass of a 4.6 meter beam, if it is balanced on a fulcrum 2.16 meters from the left end. A 820 N man stands on the very left end
In the circuit shown, the AC voltage source supplies an rms voltage of 157 V at frequency f. The circuit has R = 96 %u03A9, XL = 215 %u03A9, and XC =99 %u03A9. Find the rms current flowing in the circuit
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