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Our sun has a surface temperature of 6000oK. The star Antares has a surface temperature of 3400oK and a diameter 300 times greater than our Sun. Find to which group of stars does Antares belong, and why?
In a Young's double-slit experiment, a set of parallel slits with a separation of 0.102 mm is illuminated by light having a wavelength of 558 nm, What is the difference in path lengths from the two slits to the location of a third order bright frin..
The resistance of a conductor is 19.2 ohms at 1.50 degress C and 25.0 ohms 91.0 degress C. What is the temperature coefficient of the resistance
If the alternating current in a circuit is described by the equation I=20sin60t, what are the peak current and frequency
an artificial lens is implanted in a persons eye to replace a diseased lens. the distance between the artificial lens
A 2.0-kg piece of marble at 100 degree C is dropped into 1.5 kg of water at 1.0 degree C, What is the specific heat of the marble
A ballplayer standing at homeplate hits a baseball that is caught by another player at the same height above the ground from which it was hit. The ball is hit with an initial velocity of 21 m/s at an angle of 54° above horizontal.
A golf ball strikes a hard, smooth floor at an angle of 33.1 ° and, as the drawing shows, rebounds at the same angle. find the magnitude of the impulse applied to the golf ball by the floor
a 0.50shy-microf capacitor is being charged in a circuit. an ammeter in the circuit reads 1.5 a. what is the
a microphone is located on the line connecting two speakers that are .845 m apart and oscillating 180 degrees out of
The heaviest and lightest strings on a certain violin have linear densities of 3.7 and 0.28 g/m. What is the ratio of the diameter of the heaviest string to that of the lightest string, assuming that the strings are of the same material?
An electron is then fired directly toward the center of the shell, from point P at distance r from the center of the shell (r >> R). What initial speed v0 is needed for the electron to just reach the shell before reversing direction.
A spherical water drop 2.6 ?m in diameter is suspended in calm air due to a downward-directed atmospheric electric field of magnitude E = 3800 N/C. How many excess electrons does it have
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