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The telescope at Yerkes Observatory in Wisconsin has an objective whose focal length is 19.4 m. Its eyepiece has a focal length of 10.0 cm.
(a) What is the angular magnification of the telescope?
(b) If the telescope is used to look at a lunar crater (diameter = 1050 m), what is the size of the first image, assuming the surface of the moon is 3.77 Ã- 108 m from the surface of the earth?
(c) How close does the crater appear to be when seen through the telescope?
A 1200-kg car travels at a constant speed of 18.00 m/s around a circular track that is 80m across. What is the kinetic energy of the car?
An unstrained horizontal spring has a length of 0.34 m and a spring constant of 240 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes. Because of these charges, the spring..
Suppose molecules of an ideal gas are escaping by effusion through a small hole in a wall of an enclosure maintained at temp T. Calculate the mean kinetic energy of a molecule in the effusion beam Ue
The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. Explain how high does the top of the ice block float above the water level?
the distance between the slits in the two-slit experiment is 1.50 x 10^ -5 m. What is the distance on the screen between the central bright fringe and the 4th order bright fringe
According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Imagine the speed quoted is that of the end of the rod.
In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles, What is the magnitude of Betty's force
A planet has a mass of 5.69Ã?1026 kg. The planet is not a perfect sphere, instead it is somewhat flattened. What is the escape speed at the poles
A cat dozes on a stationary merry-go-round, at a radius of 6.0 m from the center of the ride. What is the least coefficient of static friction between the cat and the merry-go-round
A box of mass 2.1 kg is on a horizontal surface. The coefficient of friction between the box and the surface is 0.32. Find the acceleration of the box
The last exhibit had a cylinder of mass 1.2 kg and radius .2 meters rolling down an incline with a linear velocity of 2 m/s. How much torque must be exerted by the friction force
Differences between these two jurisdictions in terms of how juveniles are treated, with the system in Bremen being more lenient and "diversion-oriented" and the one in Colorado being more "punitive."
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