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Question: A plane wave of unknown frequency is normally incident in air upon the surface of a perfect conductor. Using an electric- field meter, it was determined that the total electric field in the air medium is always zero when measured at a distance of 2 m from the conductor surface. Moreover, no such nulls were observed at distances closer to the conductor. What is the frequency of the incident wave?
A flight attendant pulls her 70.0N flight bag a distance of 244 m along a level airport floor at a constant speed. The force she exerts is 36N at an angle of 52° above the horizontal. Find the work she does on the flight bag.
A turtle ambles leisurely–as turtles tend to do–when it moves from a location with position vector r1,x = 1.97 m and r1,y = -2.35 m in a lettuce garden to another location, with position vector r2,x = 3.15 m and r2,y = -4.15 m, where the lettuce a..
A solid cylinder is rolling on a surface. What fraction of its total kinetic energy is in the form of rotational kinetic energy about the center of mass?
A guitar string is 93 cm long and has a mass of 3.6 g. The distance from the bridge to the support post is L = 60 cm, What is the frequency of the second overtone
An 8.66g bullet is fired into a 260g block that is initially at rest at the edge of a table of h = 1.07 m height, What is the initial horizontal velocity of the block as it flies off the table
What is the angular separation of two spectral lines of wavelengths 446 nm and 398 nm formed in order m=2 with a 360 line/mm grating
Violet light falls on a surface with two small slits 1.9x10-4 cm apart. A first-order line appears 13.2 cm from the central bright spot on a screen opposite the slits. The distance from the center of the slits to the first-order violet line is 60 cm...
Two stationary positive point charges, charge 1 of magnitude 3.50 nC and charge 2 of magnitude 1.50 nC , are separated by a distance of 31.0 cm. What is the speed (Vfinal) of the electron when it is 10.0 cm from charge 1
A cork shoots out of a champagne bottle at an angle of 35.0 degree above the horizontal. what was its initial speed
What is tension in each rope
Light is diffracted when it passes through a narrow single slit. What happens to the width of the central maximum in the diffraction pattern when the width of the slit trough which light passes is reduced.
Suppose 79kW is to be transmitted over two 0.105ohms lines. Estimate how much power is saved if the voltage is stepped up from 200V to 2000V and then down again, Estimate how much power is saved
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