A thin ribbon of a silver alloy 2.00-cm wide and 0.015 0-mm thick carries a current of 6.98 A perpendicular to a magnetic field. The Hall voltage is found to be 1.24 × 10^?4 V when the magnetic field is 2.50 T. Calculate n, the number of charge carriers per cubic meter


5.86 × 10^28/m3

Physics & Space Science

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A magnifying glass uses a converging lens with a refractive power of 20 diopters. What is the angular magnification if the image is to be viewed by a relaxed eye with a near point of 25 cm?

A) 5.0 B) 3.0 C) 4.0 D) 1.0 E) 2.0

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An unclad optical fiber has index of refraction 1.40 . What is the acceptance angle for this fiber if it is submerged in a fluid with index of refraction 1.30? The acceptance angle is the greatest angle at which the light enters the end of the fiber and still causes total internal reflection

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Physics & Space Science

What happens to a star when the fusion cycle gets to the element iron?

What will be an ideal response?

Physics & Space Science