Why does the Moon appear bigger near the horizon?
A. due to refraction
B. due to an optical illusion
C. due to the compression produced by Earth's atmosphere
D. due to reflection
Answer: B
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Which of the following could be the molecular formula for an alkene?
a. C8H8 b. C9H18 c. C5H9 d. C5H8 e. C8H18
The Coulomb force between two charges can be attractive or repulsive
Indicate whether the statement is true or false
Light of the same wavelength passes through two diffraction gratings. One grating has 4000 lines/cm, and the other one has 6000 lines/cm. Which grating will spread the light through a larger angle in the first-order pattern?
A) the 4000-line grating B) the 6000-line grating C) Both gratings spread the light the same.
A 75-N box rests on a perfectly smooth horizontal surface. The minimum force need to start the box moving is
A) 75 N. B) 7.5 N. C) 750 N. D) any horizontal force greater than zero.