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A uniform magnetic field B is perpendicular to the plane of a circular loop of radius r. The magnitude of the field varies with time according to B=B(nought)e^-t/t, where B(nought) and t are constants. Find the emf in the loop as a function of time.
four long straight wires are perpendicular to the page and their cross sections form a square of edge length a 6.65
q1. a 7.40-nc charge is positioned 1.70 m from a 4.80-nc charge. a find the magnitude of electrostatic force that one
What is the free-fall acceleration toward the sun at the distance of the earth's orbit? [The mean distance the earth is from the sun in its orbit is 1.50x10^11 m
A proton with v = 322 m/s is moving through a region in which the magnetic field is B = 2.2 T, what angle does the protons velocity make with B
q1. james is scheduled for a job interview with ms. farrar. he knows that she is in charge of selecting placing and
A 6 m long 50 kg ladder leaning on a frictionless wall can successfully be scaled by a 120 kg man. What is the minimum angle between the ladder and the floor
A beam of neutrons with a de Broglie wavelength of 0.260nm diffracts from a crystal of table salt, which has an interionic spacing of 0.280nm, What is the speed of the neutrons
q1. a football spends a total of 5 seconds in the air. it reaches a peak height of 30 meters. how long does it take to
Evaluate with the strength of the earth's gravity at its surface, how much weaker is gravity at a distance of 10 earth's center.
Law of Gravitation- Find out an expression for the magnitude of the initial velocity that a projectile should possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-..
The emissivity of tungsten is 0.350. A tungsten sphere with a radius of 1.19 is suspended within a large evacuated enclosure whose walls are at a temperature of 285.0 . What power input is needed to maintain the sphere at a temperature of 2500.0 i..
Two converging lens with a focal lengths of 10 cm are separated by 10 cm. What is the position of the final image
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