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1) A 250 mA current flows through a circular arc that subtends 130o at the center point P. The radius of the arc is 3.48 m. What is the strength of the magnetic field at the center of the arc?
2) A short coil of five loops having a common radius of 5.50 cm conducts a current of 1.20 A. The loops are tightly wrapped so that they can be considered to be in the same place.
(a) What is the strength of the central magnetic field?
(b) What current would have to flow through a single loop of wire of the same radius to produce the same magnetic field?
3) A certain helix in three-dimensional space is described by the equations x = cos θ, y = sin θ, and z = θ. Calculate the line integral, along one loop of this helix, of the dot product V·ds, where V is the constant vector field (3, -5, 4) and ds = (dx, dy, dz).
A spring with spring constant 12.5 hangs from the ceiling. A 400 ball is attached to the spring and allowed to come to rest. It is then pulled down 6.80 and released. What is the time constant if the ball's amplitude has decreased to 3.90 after 57.0 ..
I have a rectangular slab of aluminum that is in contact with a rectangular slab of copper and both slabs are 5.00 cm x 15.0 cm in area. how much energy would flow from one face to the other
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.22 m/s relative to the ground. How fast is the train moving
If the ball is pulled down a small additional distance and released, find at what frequency will it vibrate? Suppose that the stress on the wire is less than the proportional limit
A man walk 25.0 degree north of east for 3.30 kilometer. Determine how far would a man walk due north and due east to arrive at the same location
A luminous disk of diameter 2 cm is places 0.8m to the left of a flat screen. A converging lens is places among the disk and the screen at a location 20cm from the disk and a real image is formed on the screen.
Some sliding rocks approach the base of a hill with a speed of 15.0m/s . The hill rises at 42.0? above the horizontal, Find the acceleration of the rocks as they slide up the hill
A magnetic field near the ceiling points up and is decreasing. Looking up at the ceiling, does non-Coulomb electric field curl clockwise or counter-clockwise.
Two tiny conducting spheres are equal and carry charges of -25.6 C and +60.5 C. They are separated by a distance of 2.07 centimeter. Find the magnitude of the force that each sphere experiences
A toy train rolls around a horizontal 1.30 diameter track. The coefficient of rolling friction is 0.10.
A gun is fired with angle of elevation 30 degrees. The max height of the shell is 300 meters. What was the muzzle speed
A very long uniform line of charge has charge per unit length 4.80x10^-6 and lies along the x-axis. A second long uniform line of charge has charge per unit length -2.40*10^-6 and is parallel to the x-axis at y=0.400m.
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