We observe that a moving charged particle experiences no magnetic force. From this we can definitely conclude that
A) no magnetic field exists in that region of space.
B) the particle must be moving parallel to the magnetic field.
C) the particle is moving at right angles to the magnetic field.
D) either no magnetic field exists or the particle is moving parallel to the field.
E) either no magnetic field exists or the particle is moving perpendicular to the field.
D
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Suppose that a ship is accelerating through space in such a way that the passengers are experiencing a constant force (due to the thrust of the ship) equivalent to the total weight of the ship and passengers on Earth
From the point of view of observers on Earth, how does the ship accelerate? A) It has a constant acceleration of 9.8 m/s2, therefore increasing its speed by 9.8 m/s with each passing second. B) At first, it has a nearly constant acceleration of 9.8 m/ s2. But as it approaches the speed of light, its acceleration gradually slows in such a way that it never stops accelerating, but never reaches the speed of light either. C) At first, it has a very large acceleration—much larger than 9.8 m/s2. But when it reaches the speed of light it stops accelerating. D) It has a constant acceleration of 9.8 m/s2 until it reaches a speed of half the speed of light. Then its acceleration suddenly slows so that it can't go much faster.
Which of the following statements best describes the status of the Copernican and Ptolemaic theories of the solar system shortly after Tycho Brahe's observations?
A) These observations showed both theories to be incorrect. B) These observations turned out to have little or no bearing on either theory. C) These observations showed Ptolemy's theory to be the correct one. D) These observations showed Copernicus's theory to be the correct one. E) These observations showed both theories to be correct.
Suppose you have a time-keeping device that always reads precisely 12:00 when the Sun crosses your meridian. What kind of time is this clock keeping?
A) mean solar time B) standard time C) apparent solar time D) universal time
Process of Science: What would you say to a friend who thinks that the general theory of relativity is a beautiful example of abstract thinking by humankind that explains extreme phenomena in astrophysics but has no application to everyday life?
What will be an ideal response?