The objective lens of a telescope has a focal length of 1.90 m. When viewed through this telescope, the Moon appears 5.25 times larger than normal
How far apart are the objective lens and the eyepiece when this instrument is focused on the Moon?
2.26 m
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Which molecule has not yet been detected in the atmospheres of exoplanets?
A) Methane B) Carbon dioxide C) Oxygen D) Water
Which of the following pure annealed materials would you expect to have the highest yield stress?
(a) FCC copper (b) BCC iron (c) HCP magnesium (d) LDPE
Refer to the accompanying narrative. What variable or variables were manipulated by the scientist?
a. DDT only b. temperature only c. weight differences only d. both DDT and weight differences e. both temperature and weight differences
A CD has a diameter of 12.0 cm. If the CD starts from rest and has a constant angular acceleration of 2.0 
then the tangential velocity of a point 3.0 cm from the center of the CD after 3.0 sec is
A. 18 cm/s. B. 21 cm/s. C. 25 cm/s. D. 32 cm/s. E. 45 cm/s.