Discuss the differences between distance and displacement
What will be an ideal response?
Distance is the total path length traversed in moving from one location to another. Displacement is the straight-line distance between two points, along with the direction from the starting point to the final point.
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All stars are born with the same basic composition, yet stars can look quite different from one another. Which two factors primarily determine the characteristics of a star?
A) its mass and its stage of life B) its apparent brightness and its distance C) its age and its location in the galaxy D) its mass and its surface temperature E) its apparent brightness and its luminosity
The following reaction is used to make the polymer described below. What is the other starting material?
A) HOCH2CH2OH B) H2O C) HOCH2CH3 D) H2CI=CH2 E) HOCH2CH2CH2CH2OH
The Moon's gravity is only _______________ that of Earth
Fill in the blank(s) with correct word
All of the following are true. Which of these gives evidence that quasars were more common when the universe was young than they are today?
A) They are more common at very great distances. B) They are very bright. C) They are active galactic nuclei. D) We don't see them in every galaxy.