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The Yerkes telescope in southern Wisconsin is the largest refracting telescope in the world. Its objective lens is 40 inches (slightly over a meter) in diameter. Its barrel length is 19.84 meters long. The barrel length of a refracting telescope also the sum of the focal lengths of its objective and the eyepiece lenses. The angular magnification to the telescope is 508. What are the focal lengths of the two lenses?
An ideal engine has an efficiency of 0.605 and uses gas from a hot reservoir at a temperature of 502 K. What is the temperature of the cold reservoir
A string is stretched between fixed supports separated by 75.0 cm. It is observed to have resonant frequencies of 288.0 and 384.0 Hz, What is the lowest resonant frequency for this string
Consider a collection of 4 "Fermi" dice. That is, no two die may have the same face up. What is the average value of the sum of the dice
Calculate the velocity of a satellite moving in a stable circular orbit about the Earth at a height of 3700 km
Calculate the Reynolds number for 25C water flow in a 1-in nominal diameter sanitary pipe at 0.5 kg/s
A bird stands on an electric transmission line carrying 1200 A. of current. The line has 6.0E-05 ohm resistance per meter, What voltage does the bird feel
A 500.0 g mass at the end of a spring vibrates 3.0 times per second, What is the maximum velocity of this mass
You apply a constant force F? =(?68.0N)i^+(36.0N)j^ to a 400kg car as the car travels 47.0m in a direction, How much work does the force you apply do on the car
The air inside a bicycle tire pump has 193 joules of work done on it as 77.3 joules of heat is conducted away from it. What is the change in internal energy of the air
Janet jumps off a high diving platform with a horizontal velocity of 1.55 m/s and lands in the water 1s later. How high is the platform? The acceleration of gravity is 9.80 m/s2.
A railroad car of mass 3.0x10^4 kg moving at 4.00 m/s collides and couples with two coupled railroad cars, what is the speed of the three coupled cars after the collision
A car of mass 1,250 kg is lowered onto a junk pile at the end of the cable of a large crane. If the car is accelerating downward at 0.19 m/s2
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