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Suppose you measure the red shifts of all the images produced by gravitational lensing, such as in Figure 34.12. You find that the central image has a red shift less than the outer images, and those all have the same red shift. Discuss how this not only shows that the images are of the same object, but also implies that the red shift is not affected by taking different paths through space. Does it imply that cosmological red shifts are not caused by traveling through space (light getting tired, perhaps)?
consider a heat pump which is used to cool down a home during the summer. its coefficient of performance in cooling
A wheel initially at rest begins rotating because of a constantangular acceleration. During a certain interval ΔT =16 s, the wheel goes through 110 rev and reaches an angular speedof 11 rev/s.
the heating coil of a hot-water heater has a resistance of 20 and operates at 210 v. if electrical energy costs
A passenger car traveling down a rough road bounces up and down at 1.2Hz with a maximum vertical acceleration of 0.25m/s2, What is the maximum speed of the oscillation
A bullet of mass mB=1.09?10?2kg is moving with a speed of 101.m/s when it collides with a rod of mass mR=6.51kg and length L=1.04m, What is the change in kinetic energy in the collision
The Earth (5.98 x 10^24 kg) and the Moon (7.35 x 10^22) kg are separated by an average distance of 3.84 x 10^8 m
Emilie wishes to fly to Phun City, a place where Physics Geeksrule the land, loacted 800 km [N] of her present postion. what will her flight time to Phun City be
Discuss the geologic history of the area where you live or grew up. Discuss some of the major factors that might have played a role in shaping the local terrain (major rivers, sea-level changes, volcanoes, ancient sea beds, glaciers, earthquakes, ..
the schrodinger equation of a two dimensional harmonic oscillator potential can be handled by separation of variables
a circuit consists of an ideal ac generator a 20nbspmicrof capacitor and an 90?nbspresistor all connected in series.
q1. two small charged metal spheres a and b are situated in a vacuum. the distance between the centres of the spheres
A cylinder of radius b = 25mm has an enclosed charge of 57.3 mC contained in a closed Gaussian surface of radius r =17mm. What is the electrical flux associated with the cylinder of radius b?
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