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# Relativistic Mechanics Questions

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5-Three galaxies are aligned along an axis in order A, B, C. An observer in galaxy B is in the middle and observes that galaxies A and C are moving in opposite directions away from him, both with speeds 0.59c. What are the speeds of galaxies B and C as observed by someone in galaxy A?
c (galaxy B)
c (galaxy C)

6-A spacecraft traveling out of the solar system at a speed of 0.80c sends back information at a rate of 680 Hz. At what rate do we receive the information?

7-Find the force necessary to give a proton an acceleration of 3.0 1019 m/s2 when the proton has the following velocities (along the same direction as the force).
(a) 0.05c
N
(b) 0.5c
N
(c) 0.8c
N
(d) 0.92c
N

8-A particle initially has a speed of 0.48c.
(a) At what speed does its momentum increase by 1%?
c
(b) At what speed does its momentum increase by 10%?
c
(c) At what speed does its momentum increase by 100%?
c

https://brainmass.com/physics/galaxies/94870

#### Solution Summary

The solution contains a step by step procedure to solve the questions posted by the student with the formula used for each question.

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## Magnetism - Why is a piece if iron attracted to either pole of a magnet? The magnetic poles of the earth are called geomagnetic poles. Is the north geomagnetic pole a north magnetic pole or a south magnetic pole? ...

Questions 19

Why is a piece if iron attracted to either pole of a magnet?

Question 20

The magnetic poles of the earth are called geomagnetic poles. Is the north geomagnetic pole a north magnetic pole or a south magnetic pole?

Question 29

When a wire loop is rotated in a magnetic field, the direction of the current induced in the loop reverses itself twice per rotation. Why?

Question 45

? Discuss the relationship between electricity and magnetism
? Identify a device that utilizes the relationship between electricity and magnetism
? Explain how the device you identified uses electricity and magnetism
? Discuss how improvements in electrical conduction and/or advancements in magnets might impact the device you identified
Questions 1

What differences can you think of between the photon and electron?

Question 27

The Bohr Theory permits us to visualize the structure of the atom, whereas quantum mechanics is very complex and concerned with such ideas as wave functions and probabilities. What reasons would lead to the replacement of the Bohr Theory by quantum mechanics?

Question 28

What physical quantities are governed by the quantum numbers of an atomic electron?

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