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The rectangular loop of wire shown in the figure has a mass of 0.25 g per centimeter of length and is pivoted about side ab on a frictionless axis. The cur-rent in the wire is 15.0 A in the direction shown. Find the magnitude and direction of the magnetic field parallel to the y-axis that will cause the loop to swing until it makes a 30.0o with the yz-plane.
Air that initially occupies 0.144 m3 at a gauge pressure of +70 kPa is expanded isothermally to atmospheric pressure, Compute the work done by the air
A 0.980 kg snowball is fired from a cliff 13.8 m high. The snowball's initial velocity is 16.2 m/s, directed 26.0° above the horizontal. How much work is done on the snowball
A laser beam aimed from the earth is swept across the face of the moon. what is the angle of divergence of the laser beam
A uniform round tube of diameter 6.32 cm has two piston tops which are balanced at exactly the same height due to a mass (m) on the left side, What mass (m) is required to balanced the system
Two spaceships are launched from the Earth in opposite directions. All moves with the speed of .75c relative to the Earth. As we see it, what is the speed by which the distance among the spaceships increases? Does this contradict the special relativi..
a block of mass 0.80 kg is suspended by a string which is wrapped so that it is at a radius of 0.054 m from the center
q1. a flight attendant pulls her 66 n flight bag a distance of 381 m along a level airport floor at a constant
X rays with initial wavelength 6.60×10?2nmundergo Compton scattering. What is the largest wavelength found in the scattered x rays
Flux and nonconducting shells. A charged particle issuspended at the center of two concentric spherical shells that arevery thin and made of nonconducting material. Figure (a) belowshows a cross section. Figure (b) below gives the netflux Φ throug..
A uniform plank of length 5.70 m and weight 215 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 452 N walk on the overhanging part of the plank before it just be..
In a material having an index of refraction n , a light ray has frequency f, wavelength ?, and speed v. What is the frequency of this light in vacuum and in a material having refractive index n1
To a good approximation, the sun's surface is a blackbody with a surface temperature of 5800K. What is the total radiated power per unit surface area
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