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A respiration monitor has a flexible loop of copper wire, which wraps about the chest. As the wearer breathes, the radius of the loop of wire increases and decreases. When a person in the Earth's magnetic field inhales, what is the average current in the loop, assuming that it has a resistance of 32.9 ? and increases in radius from 18.5 cm to 24.1 cm over 1.13 s? (Assume that the magnetic field is perpendicular to the plane of the loop and has a magnitude of 42.9 ?T.)
Find the distance from the mirror to the point where the reflected rays meet.
A singly charged ion of 7Li (an isotope of lithium) has a mass of 1.16×10?26kg. What is the radius of the ion's path in the magnetic field
What is the kinetic energy of a 1,500 kg car with velocity of 72.0 km/hr? How much work must be done on the car to bring it to a complete stop.
A bird stands on an electric transmission line carrying 3100 A. of current. The line has 4.0E-05 ohm resistance per meter, What voltage does the bird feel
q1. a 430g block slides along a frictionless surface at a speed of 0.35 ms. it runs into a horizontal massless spring
using momentum newtons first law of motion and or newtons second law of motion explain how a rocket is launched deep
The greatest ocean depths on the Earth are found in the Marianas Trench near the Philippines. Calculate the pressure due to the ocean at the bottom of this trench
The internal energy of a gas is 1000 J. The gas is compressed adiabatically, and its volume decreases by 500 cm3. what is the internal energy of the gas
A contact lens is made of plastic with an index of refraction of 1.58. The lens has an outer radius of curvature of +1.99 cm, What is the focal length of the lens
A scaffold supports a weight of 500 lbs. If the force in one end support is 150 lbs, how much force is supported by the other end
If astronauts could travel at v = 0.950 c, we on Earth would say it takes (4.20 / 0.970) = 4.42 years to reach Alpha Centauri, 4.20 light-years away. The astronauts disagree. How much time passes on astronauts' clocks? What is the distance to Alph..
Two identical conducting small spheres are placed with their centers 0.395 m apart. Find the electric force exerted by one sphere on the other
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