The following figures show four positions of a comet during its orbit of the Sun. Also shown is the orbit of the Earth around the Sun. Rank the positions of the comet from left to right based on the expected size of its tail, from shortest to longest. (Not to scale; tails not shown.)
What will be an ideal response?
Ans: The length of a comet's tail depends primarily on the comet's distance from the Sun. It is longer when the comet is closer to the Sun and shorter (or nonexistent) when the comet is farther from the Sun.
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According to the de Broglie hypothesis, which of the following statements is applicable to the wavelength of a moving particle?
a. directly proportional to its energy b. directly proportional to its momentum c. inversely proportional to its energy d. inversely proportional to its momentum
The name of our planetary system orbiting our Sun is called the Milky Way Galaxy
a. True b. False Indicate whether the statement is true or false
Imagine that an electron with an initial spin state 
goes into an SGz device and comes out the – channel of that device. The electron’s spin state is now
A. 
B. 
C. 
D. 
E. 
The appearance and arrangement of characters commonly is referred to as _______.
A. type B. text C. typeset D. track