The law of conservation of energy:
a. fails because energy increases too fast as the speed gets closer to c.
b. does not apply to the theory of special relativity.
c. applies to the theory of special relativity as long as the relativistic adjustment factor is correctly included.
d. applies to any given inertial system but not to others.
e. applies to the theory of special relativity in exactly the same form as it applies for small velocities.
c
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A(n) _______________is something that is held to be obviously true and needs no further examination
Fill in the blank(s) with correct word
Astronomers can measure a star's mass in only certain cases. Which one of the following cases might allow astronomers to measure a star's mass?
A) The star is a member of a binary star system. B) The star is of spectral type G. C) The star is of spectral type A. D) We know the star's luminosity and distance.
An electron, initially at rest is accelerated through a potential difference of 550 V. What is the speed of the electron due to this potential difference?
A) 1.44 × 106 m/s B) 1.59 × 106 m/s C) 6.10 × 106 m/s D) 18.7 × 106 m/s E) 13.9 × 106 m/s
Why is there an upper limit to the mass of a white dwarf?
A) The more massive the white dwarf, the higher its temperature and hence the greater its degeneracy pressure. Near 1.4 solar masses, the temperature becomes so high that all matter effectively melts into subatomic particles. B) White dwarfs come only from stars with masses less than 1.4 solar masses. C) The upper limit to the masses of white dwarfs was determined through observations of white dwarfs in binary systems, but no one knows why the limit exists. D) The more massive the white dwarf, the greater the degeneracy pressure and the faster the speeds of its electrons. Near 1.4 solar masses, the speeds of the electrons approach the speed of light, and no more mass can be supported.