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A spiral arm galaxy is large group of stars which rotates about a central bulge. Our own Milky Way galaxy is just one such formation. Let's assume we have another spiral arm galaxy whose center is 23.6 light-years from earth and is moving away from earth at a velocity of 33 X105 m/sec. The galaxy is rotating such that points in the extreme parts of it's spiral arms are rotating with a speed of 55 X105 m/sec relative to the center. Light with a particular frequency of 8.32 X 1014Hz is emitted from stars in both arms.
1) What is frequency of this light detected by astronomers that are observer the glaxay arm that is moving away from the earth?
2) What is frequency of this light detected by astronomers that are observer the glaxay arm that is moving towards the earth?
What must the charge (sign and magnitude) of the particle of mass 1.42 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 650 N/C.
A spherical balloon has a radius of 7.5 m, and is filled withhelium. How large a cargo can it lift, assuming that the skin andstructure of the balloon have a mass of 800 kg
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find the tangential and centripetal components of the net force exerted on a car (by the ground) when its speed is 38 m/s, and it has accelerated to this speed from rest in 9.5 s on a curve of radius 370 m. The car's mass is 1000 kg.
a 2.60-g lead bullet at 32.0degc is fired at a speed of 210 ms into a large block of ice at 0degc in which it becomes
A disk rotates with constant angular acceleration. The initial angular speed of the disk is 2 rad/s. After the disk rotates through 1 radians, the angular speed is 17rad/s. What is the magnitude of the angular acceleration?
A spring with constant k = 10 N/m is attached to a block. What is the force on the block by the spring when the spring has been stretched by 0.05 m
A metal wire of mass 91 kilogram slides without friction on two horizontal rails spaced a distance of 73 meter apart. Determine the velocity of the wire at t = 95 second, assuming it to be at rest at t =0
When the capacitor is charged to 135V , what is the charge per unit length lambda on the capacitor
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