Which terrestrial planet has the youngest surface?
A. Earth
B. Mercury
C. Mars
D. Venus
Answer: D
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Mass can flow from one star in a binary system to its companion through the first ____________________ point
Fill in the blank(s) with correct word
The scientific method is a ___________________ by which scientists form hypotheses and test them agains evidence gathered by observation or experiment
Fill in the blank(s) with correct word
Because protostars are at a low temperature and surrounded by dust and gas, astronomers must observe them with ________.
A. ultraviolet telescopes B. gamma ray telescopes C. radar D. infrared and radio telescopes
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.5 cm, respectively. An object is placed 0.3 cm from the objective. The image of this object is viewed with the eyepiece adjusted for minimum eyestrain
What is the distance between the objective and the eyepiece? A) 9.85 cm B) 10.1 cm C) 10.4 cm D) 11.2 cm E) 11.5 cm