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An ensemble of masers orbit the center of an edge-on spiral galaxy at a particular radius, and are observed at a wavelength of 1.855x10-1 m on the side of the galaxy approaching us, and at 1.863x10-1 m on the side receding from us. What is the orbital speed at the radius at which the masers orbit? Astronomers observed these masers over an interval of one year. What distance does a single maser move during that year? Give your answer in kilometers and in AU. During this period, a maser moving across the line of sight moved through an angle of only 0.000015 arcsec. Calculate the distance to the galaxy.
a particle of mass 6kg traveling with speed 4m/s in the direction 30 degrees S of W on a horizontal plane suddenly shoots one-third its mass in the north direction with speed 5.5 m/s
What is closing equilibrium temperature of the tin-water
A certain lightbulb has a tungsten filament with a resistance of 19.5 ? when at 20.0°C and 142 ? when hot. Assume the resistivity of tungsten varies linearly with temperature even over the large temperature range involved here. Find the temperature o..
In which one of the following circumstances could mechanical energy not possibly be conserved, even if friction and airresistance are absent? why?
A 0.113 kg remote control 17.4 cm long rests on a table, as shown in the figure below, with a length L overhanging its edge. How large is the normal force when the button is pressed
The refractive indices of materials A and B have a ratio of nA/nB = 1.79. The speed of light in material A is 1.07 x 10^8 m/s. What is the speed of light in material B
a rock is thrown horizontally with a speed of 18 ms from a vertical cliff of height 27 m. what is the velocity
A squirrel falls from a very tall tree. Initially at t= 0), the squirrel is at the top of the tree, a distance y 50 m above the ground. Estimate the average velocity of the squirrel
A car traveling at a speed of v can brake to an emergency stop in a distance x. What would be the braking distance if the car were traveling at 60.0km/h
Two wheels have the same mass and radius of 4.8 kg and 0.50 m, respectively. Find the net external torque that acts on each wheel
a metallic surface is illuminated with light of wavelength 400 nm if the work function for this metal is 2.487 eV what the velocity of the ejected electrons would be
a 4.0-kg block slides down a frictionless incline making an angle of 50.0deg with the horizontal.a what is the total
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