The index of refraction of a certain medium is 1.5. What is the speed of light in that medium?
A) 1.0 × 108 m/s
B) 2.0 × 108 m/s
C) 3.0 × 108 m/s
D) 4.0 × 108 m/s
E) 5.0 × 108 m/s
B
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The density of a neutron star is
a. about the same as that of a white dwarf. b. about the same as that of the Sun. c. about the same as an atomic nucleus. d. zero.
Moving clocks are observed to run more slowly than clocks that are at rest in the observer's own frame fo reference
Indicate whether the statement is true or false
Which of these scientists pioneered the study of electricity?
A) Isaac Newton B) Galileo C) Benjamin Franklin D) all of the above
When an artery gets a constricted region due to plaque, how does the pressure in this region compare to the pressure in an unconstricted region adjacent?
a. Since this is a closed system, the pressure is the same in both regions. b. In the constricted region the blood moves at a higher speed than in the unconstricted region resulting in an increased pressure. c. In the constricted region the blood moves at a higher speed than in the unconstricted region resulting in a decreased pressure. d. In the constricted region the blood moves at a lower speed than in the unconstricted region resulting in an increased pressure.