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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)?
a plane has an airspeed of 142 ms. a 16.0 ms wind is blowing southward at the same time as the plane is flying. if the
If we model a blade as a point mass at the midpoint of the blade, what is the inward force necessary to provide each blade's centripetal acceleration
A jet engine emits sound uniformly in all directions, radiating an acoustic power of 3.23 × 102 kW. If the intensity of the sound at a distance of 40.3 m from the engine is 15.8 W/m^2 calculate the corresponding sound intensity level in dB
What is the final temperature reached by the addition of 11.4 grams of steam at 100°C to 681 grams of water at 25°C in an aluminum calorimeter having a mass of 781 grams.
question you are traveling in a spaceship at a speed of 0.83c away from earth. you send a laser beam toward earth
An airplane with a speed of 74.9 m/s is climbing upward at an angle of 60.3 ° with respect to the horizontal. Calculate the distance along the ground
An 80.0-m-long brass rod is struck at one end. A person at the other end hears two sounds as a result of two longitudinal waves, What is the time interval between the two sounds
The temperature of 3.00 mol of an ideal diatomic gas is increased by 47.0°C without the pressure of the gas changing. What is the change in the internal energy for the gas
A 15kg block is on a ramp which is inclined at 20 degree above the horizontal it is connected by a sting to 19kg mass which hangs over the top edge of the ramp. Assuming that fractional forces might be neglected, what is the magnitude of the accelera..
What is the radius r of the iron ball?
An electron is released from rest at the negative plate of a parallel plate capacitor. Obtain how fast is the electron moving just before it reaches the positive plate
A 1300-turn coil of wire that is 2.3cm in diameter is in a magnetic field that drops from 0.11T to 0 T in 12ms. What is the emf of the coil
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