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A 11 cm long metal rod pulled along two frictionless, conducting rails at a constant speed of 1.7 m/s. the rails have negligible resistance , but the rod has a resistance of 0.91 ohm B= 1.3 T what is the current introduced in the rod? What is the force required to keep the rod moving at constant speed? Answer both questions please.
An electron in the hydrogen atom jumps from a level in which the energy is 1.89 eV higher than the energy of the final lower-energy level. What is the frequency of the light emitted in this transition
A charge of -250e is uniformly spread through the volume of a sphere of radius 2.00 cm. What is the volume charge density in that sphere
A spy satellite is in circular orbit around Earth. It makesone revolution in 6.01 hours. How high above Earth's surface is the satellite
A disk, with a radius of 0.25 m, is to be rotated like a merry-go-round through 1000 rad, starting from rest, gaining angular speed at the constant rate ?1 through the first 500 rad and then losing angular speed at the constant rate -?1 until it i..
The refractive indices of materials A and B have a ratio of nA/nB = 1.71. The speed of light in material A is 1.36 x 108 m/s. What is the speed of light in material B?
Pick what you think are the most reasonable choices for each parameter in the Drake equation and justify your choice. estimate the likely nearest distance to such a civilization
A stone with a mass of 0.900 kg is attached to one end of a string 0.900 m long. The string would break if its tension exceeds 60-N. The stone is whirled in a horizontal circle on a frictionless tabletop.
The elementary particle called a muon is unstable and decays after 2.20 ?s, What lifetime do you observe for the muon
Ultraviolet light is shone on a particular metal and the stopping potential is measured at the same time. What is the work function of the metal
Two sinusoidal waves traveling in opposite directions interfere to produce a standing wave with the wave function y = (1.00) sin(0.800x) cos(300t), Determine the wavelength of the interfering waves
1. How much more light does one collect with a 4-meter diameter telescope in 0.5 minutes than with a 0.5-meter diameter telescope in 4 minutes?
A thin metallic spherical shell of radius 42.6 cm has a total charge of 6.95, What is the electric field at a distance of 14.4 cm from the center of the spherical shell
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