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How fast and in what direction must galaxy A be moving if an absorption line found at wavelength 550nm (green) for a stationary galaxy is shifted to 450nm (blue) (a "blue shift") for Galaxy A? How fast and in what direction is galaxy B moving if it shows the same line shifted to 700nm (red shift)?
a 1.5 kg object initially at rest is raised to a height of 10 m by a force of 40 n. what is the velocity of the object
Three 100 ? resistors are connected as shown in the figure. The maximum power that can safely be delivered to any one resistor is 21.5 W. find the total power delivered to the combination of resistors
Zero, a hypothetical planet, has a mass of 4.0 1023 kg, a radius of 3.0 106 m, and no atmosphere. A 13 kg space probe is to be launched vertically from its surface.
A massive steel cable drags a 11 kg block across a horizontal, frictionless surface. What is the mass of the cable
When you normally drive the freeway between Sacramento and San Francisco at an average speed of 95.0km/hr (59.0mph), How much longer does the trip take on Friday than on the other days
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, Determine the horizontal and vertical components of the launch velocity
two crewmen pull a raft through a lock . one crewman pulls with a force of 130 at an angle of 34 relative to the
A transformer consists of two coils of wire wound on a common toroidal iron core. What is the induced emf in the second coil
A meter stick of weight W leans away from a wall. The 0cm line is against the wall at the floor and it makes an angle theta with the wall. It is kept from falling by a horizontal string connected to the 80cm line. What is the tension (T) in the strin..
A rope is used to pull a 3.57 kg block at constant speed 3.58 m along a horizontal floor. What is the work done by the rope's force
Two cars start racing from rest. The track is 400 meters long and linear. Car A accelerates at 3.4m/s2 and Car B accelerates at 3.0m/s2. What is Car A's speed when it crosses the finish line
In the "free electron molecular orbital" (FEMO) theory, the electrons in a conjugated molecule are treated as independent particles in a box of length L. Predict the minimum excitation energy in butadiene.
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