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A telescope for astronomy view has an objective lens 180[mm] diameter with focal length 2000[mm], and is sold with (two) eyepieces ... (1) f of 12[mm] and (2) f of 36[mm] .What magnifications does each provide?
The root-mean-square speed (thermal speed) of the molecules of a gas is 200 m/s at a temperature 23.0°C.
A copper cable is designed to carry a current of 400.00 A with a power loss of 2.00 W/m. What is the required radius of this cable
A runner of mass 51 kg runs around the edge of a horizontal turntable mounted on a vertical, frictionless axis through its center. The runner's velocity relative to the earth has magnitude 3.50 m/s. The turntable is rotating in the opposite direct..
All distant galaxies are moving away from us. Describe why this does not imply that we are at the center of universe.
Billy is running on level ground with a speed of 3.5 m/s. He attempts to jump a ditch that is 1.5 meters wide. determine the minimum vertical component of velocity when he jumps
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
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 157m up the shaft in 23s at constant speed. At what average rate does force from the cable do work on the cab.
How long does it take an automobile travelling 56.50 km/h to become even with a car that is travelling in another lane at 36.50 km/h if the cars' front bumpers are initially 148m apart.
A charge of 3.0 uC(micro C) and a second charge are initially far apart. find the magnitude of the unknown charge
A major-league catcher gloves a 93 mi/h pitch and brings it to rest in 0.14m. If the force exerted by catcher is 803 N, what is the mass of the ball.
You have a 96.1-cm-long copper rod with a rectangular cross section of dimensions 5.47 cm by 7.39 cm. Find the heat current* through the rod
A system undergoes a 2-step process. In the first step, the internal energy of the system increases by 228J when 166J of work is done on the system. What type of process is the overall process
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