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A long wire is known to have a radius greater than 4.0 mm and to carry a current that is uniformly distributed over its cross section. The magnitude of the magnetic field due to that current is 0.38 mT at a point 4.0 mm from the axis of the wire, and 0.23 mT at a point 10 mm from the axis of the wire. What is the radius of the wire?
A hydrogen atom at rest makes a transition from the n=8 state to n=3. Find the wavelength of the emitted photon
q. a certain toaster has a heating element made of nichrome resistance wire. when the toaster is first connected to a
Plane leaves the airport in Galisto and flies a distance 180 at an angle 68 east of north and then changes direction to fly the distance 250 at an angle 48 south of east, after which it makes an immediate emergency landing in a pasture.
A cell membrane acts as a parallel-plate capacitor with a spacing of 13 nm and filled with water. Suppose the positive plate is on top, What is the capacitance of the membrane
An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. Illustrate what is the speed of the electron when it is 10.0 from charge 1?
A Carnot refrigerator extracts 30.0 kJ as heat during each cycle, operating with a coefficient of performance of 5.00. find the energy per cycle transferred as heat to the room
Assume that the partner moves on a circle that has a radius of 6.50 m. At a swinging speed of 4.45 m/s, what force must the man apply to his partner in the straight-down position?
A motorcycle has a constant speed of 28.1 m/s as it passes over the top of a hill whose radius of curvature is 130 m. Find the magnitude of the centripetal force
After the ambulance passes, the observed frequency of the siren is 493 Hz. Conclude the ambulance's speeds from these observations.
A train 400m long is moving on a straight track with a speed of 84.30km/h. The engineer applies the brakes at the crossing and later the last car passes crossing with the speed of 17.7 km/h. suppose constant acceleration; conclude how long the tra..
A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 2.15 rad/s2. Through what angle has the wheel turned when its angular speed reaches 72.0 rad/s
A stationary particle of charge q = 2.5 x 10-8 C is placed in a laser beam (an electromagnetic wave) whose intensity is 2.6 x 103 W/m2. find the magnitude of the magnetic forces exerted on the particle
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