When a comet like Comet Hale-Bopp comes closest to the Sun in its orbit, we say that it is at:
a. apogee
b. the minimum angular momentum point
c. perihelion
d. circular satellite velocity
e. the tail end of its journey
Ans: c. perihelion
You might also like to view...
What is happening inside a star while it expands into a subgiant?
A) It is fusing hydrogen into helium in the core. B) It is fusing hydrogen into helium in a shell outside the core. C) It is fusing helium into carbon in the core. D) It is fusing helium into carbon in a shell outside the core. E) It is not fusing any element; it is contracting and heating up.
Suppose an object is placed 6.0 cm in front of a lens that has a focal length of 4.0 cm. Where is the image located? What are the magnification and the character of the image?
Graphical Addition: The sum of two vectors of fixed magnitudes has the greatest magnitude when the angle between these two vectors is
A. 90°. B. 180°. C. 60°. D. 0°. E. 270°.
Distinguish between fluorescence and phosphorescence