Very early in his thinking about relativity, Einstein asked himself what a person would observe if he or she kept up with a lightbeam. In answer to this question, the theory of relativity states that
A) this is not a valid question because a person cannot move as fast as a lightbeam.
B) the light beam would stand still and so time would stand still.
C) the observer would suddenly undergo a sex change.
D) the observer own would continue to observe the same laws of physics.
E) time would speed up without limit, and would pass at an "infinite" rate.
A
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Which of the following was the most imperfect region according to Aristotle's philosophy?
A) The center of the Sun B) The heavens C) Earth's surface D) Earth's center
The large space telescope that has been placed into an Earth orbit has an aperture diameter of 2.40 meters. What angular resolution will this telescope achieve for visible light of wavelength ? = 4.80 × 10?7 m?
A. 2.44 × 10?7 rads B. 2.44 × 10?4 rads C. 2.44 × 10?3 rads D. 1.22 × 10?6 rads E. 2.00 × 10?6 rads
A particle (q = 3.0 mC, m = 20 g) has a speed of 20 m/s when it enters a region where the electric field has a constant magnitude of 80 N/C and a direction which is the same as the velocity of the particle. What is the speed of the particle 3.0 s after it enters this region?
a. 68 m/s b. 44 m/s c. 56 m/s d. 80 m/s e. 36 m/s
AM radio stations have greater range than FM stations because they have more powerful transmitters
Indicate whether the statement is true or false