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Some 30 years after the death of Galileo, a Danish astronomer named Ole Romer made a systematic study of the moon, Io, of Jupiter at the Paris Observatory. As Io goes around Jupiter it periodically disappears as it goes behind Jupiter. For several months, Romer found that the expected eclipses lagged farther and farther behind the expected time, but then began to gain time again. What was clearly happening was that as Jupiter got farther away from the earth the time lagged, and when it got closer, the time gained. The observed time delay was the greatest when Jupiter was the farthest from the earth. Romer concluded that the reflected light from Io must take 22 minutes to cross the diameter (twice the radius) of earth s orbit. This was an overestimate, but by the time Newton wrote Principia, a number of astronomers had reproduced the result, and narrowed the transit time to 16 minutes. Considering that the distance from the Sun to the earth is 93 Million Miles, what do you calculate for the speed of light in miles per second?
A. 96,875 miles/second
B. 193,750 miles/sec
C. 48,438 miles/sec
D. 100 miles/hour
A curve of radius 144 m is banked at an angle of 12°. An 852-kg car negotiates the curve at 87 km/h without skidding. Find the frictional force exerted by the pavement on the tires
Use element and connection constraints to find vx and ix.- Show that the sum of the currents into the rest of the circuit is zero.
Find the rms voltage across each element in an RLC circuit with R = 9.9k? , C = 0.14?F , and L = 27mH
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What greatest height above the break free point does it rise? How high is the break free point above ground.
The coefficient of static friction between the m =2.90 kg crate and the 35.0°incline of the figure below is 0.320.What minimum force vector F must be applied to the crate perpendicular tothe incline to prevent the crate from sliding down the incline?
Find out the critical angle theta_ce for e-waves in calcite. The index of refraction for light with electric field parallel to the optical axis (called extraordinary waves or e-waves) is 1.4864. The index of refraction for light with electric fiel..
Find the range of wavelengths seen in the hydrogen emission spectrum in the Brackett series. Find the shortest wavelength in the Brackett series
A 98.0-g wooden block is initially at rest on a rough horizontal surface when a 12.6-g bullet is fired horizontally into it, determine the speed of the bullet immediately before impact
A mountain climber stands at the top of a 32.5-m cliff that overhangs a calm pool of water. What initial velocity must the second stone have had, given that they hit the water simultaneously
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