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1. Determine the wavelength of the standard 21-cm hydrogen spectral line that we receive from the galaxy described in the preceding problem. Could such a large redshift lead astronomers to mistake this spectral line for another one that has an intrinsically longer wavelength?
2. The largest known redshift attributed to a speci?c molecule is z = 6.42 from the CO molecule in the quasar SDSS J1148+5251. Find the quasar's distance from us and recession speed relative to us.
3. One of the largest observed redshifts for a galaxy is 8.6 from the galaxy UDFy-38135539. How fast is the galaxy moving with respect to us? How far away is it?
4. (a) Research the different types of supernova and explain why Types Ia, Ib, and Ic are labeled differently.
(b) Why do Types Ib, Ic, and II have more in common with each other than with Type Ia?
You drop a stone into a deep well and hear it hit the bottom 2.60 s later. This is the time it takes for the stone to fall to the bottom of the well.
A physical pendulum is composed of a 1.4 m rod with mass mr = 0.5 kg and a solid sphere with mass ms = 2.0 kg, What is the angular frequency of the oscillation
The density of a 3.0-m long rod can be described by the linear density function ?(x) = 125 g/m + 13.0x g/m2. Determine the total mass of the rod
Find the work done by the gas, the heat absorbed by the gas, and the internal energy change of the gas, first for each part of the cycle and then for the complete cycle.
Conclude the magnitude of angular acceleration
A spring is resting vertically on a table. A box is dropped onto the top of the spring and compresses it. Obtain the magnitude of the spring displacement at an instant when the acceleration of the box is zero
a person moves 25.0 m along 30 degrees north of east and then he moves 50.0 m due west. how far and in what direction
Use the work-energy theorem to solve each of these problems. Youcan use Newton's laws to check your answers. Neglect air resistancein all cases. A branch falls from the top of a96.0-m-tall redwood tree, startingfrom rest. How fast is it moving when ..
An ancient wooden club is found that contains 195 g of carbon and has an activity of 7.0 decays per second. Decide its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3 multiplied by 10-12.
Two forces of 2 and 3N, respectively, make an angle of 50 degrees with each other. Determine the resultant analytically by applying the cosine law, namely, R^2= A^2 +2AB cos (theta) + B^2, where A and B are the two forces and R is the resultant?
Find how much time does it take an electron traveling at the drift velocity to transverse the 2 centimeter long tungsten filament that has a radius of 0.1 millimeter
A car with a total mass of 1.43 103 kg has wheels of radius 29.0 cm and moment of inertia 0.885 kg · m2. Find the car's rotational energy when the car is moving at a speed of 22.0 m/s
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