If you draw a spacetime diagram, the worldline of an object that is accelerating away from you is
A) vertical.
B) horizontal.
C) slanted.
D) curved.
E) a circle.
D
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Sir William Herschel counted the number of stars in different directions, and getting similar numbers in each direction along the disk, concluded the Sun was near the center of a disk like collection of stars. Herschel came to the wrong conclusion about the Sun's location because
A. He did not know that interstellar dust made it hard for him to see a large part of the Milky Way's disk. B. The Sun's position in the Milky Way at that particular time was very unusual and skewed his results. C. He only counted globular clusters, and not regular stars. D. He was predisposed to believe the Sun was in the center of the Milky Way, and ignored data which disagreed with that conclusion.
In the evolution of massive stars, what is the significance of the temperature 600 million K?
A) It is the temperature at which helium fuses into carbon. B) It is the temperature needed for carbon fusing into heavier elements. C) It is the main sequence core temperature which makes massive stars so bright. D) It is the temperature needed for helium burning into boron. E) It is the final temperature reached during their evolution.
In an RLC series circuit, which of the following statements is true?
A. The current is in phase with the voltage across the inductor. B. The current is in phase with the voltage across the resistor. C. The current is in phase with the voltage across the capacitor. D. None of the choices are true.
Meteor showers result when asteroids collide and this debris showers the inner solar system
Indicate whether the statement is true or false