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A rectangular sample of a metal is 3.8 cm wide and 600 µm thick. When it carries a 30 Acurrent and is placed in a 0.8 T magnetic field it produces a 6.5µV Hall emf.
a) Determine the Hall field in the conductor.b) Detrmine the drift speed of the conduction electrons.c) Determine thedensity of free electrons in the metal.
A hiker starts at his camp and moves the following distances while exploring his surroundings: 60.0 m north, 2.95 102 m east, Find his resultant displacement from camp
Light passes through a diffraction grating with 3550 lines/cm and forms a first-order maximum at an angle of 12.07°. At what angle will the second maximum appear
A satellite moves in a circular earth orbit that has a radius of 8.38 x 106 m. A model airplane is flying on a 22.8-m guideline in a horizontal circle. The guideline is nearly parallel to the ground. Find the speed of the plane such that the plane an..
a 30 year old women takes a trip on a rockect leaving her 30 year old brother behind. She travels at a speed of .8c and is gone for 20 years, how many years older/younger is she than her brother
a world class sprinter can burst out of the blocks to essentially top speed of about 11.5m/s in the first 15.0m of the race. What is the average acceleration of the sprinter
A lens that is "optically perfect" is still limited by diffraction effects. Suppose a lens has a diameter of 130mm, What is the linear width (diameter) of the central maximum at the focal distance of the lens
The current in a series circuit is 6.0 A. When an additional 17.0 resistor is inserted in series, What is the resistance in the original circuit
A ball is dropped from a height of 4 m and makes an elastic collision with the ground. Assume that no mechanical energy is lost to air resistance. (a) Show that the ensuing motion is periodic. (b) Determine the period of the motion. (c) Is the motion..
A sprinter is just coming out of the starting block, and only one foot is touching the block. How large is the resultant of these forces
A 2.3-kg cart is rolling along a frictionless, horizontal track towards a 1.6-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certai..
A certain kind of glass has an index of refraction of 1.650for blue light of wavelength 430nm and an index of 1.615 for redlight of wavelength 680 nm. what is the angle between the two beams inside the glass
A spherical balloon is made from a material whose mass is 2.33 kg.The thickness of the material is negligible compared to the 1.77-mradius of the balloon. The balloon is filled with helium (He) at atemperature of 283 K and just floats in air, neit..
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