What happens to the image in a pinhole camera if the screen is moved closer to the pinhole?
A. The image decreases in size.
B. The image increases in size.
C. The image remains the same size.
D. The image is blurry
Ans: A. The image decreases in size.
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Compared to the particles making up most of Saturn's rings, the albedo of Uranus's and Neptune's particles is less
a. True b. False Indicate whether the statement is true or false
Hadrons are divided into two subgroups called
A) baryons and leptons. B) leptons and mesons. C) mesons and baryons. D) nucleons and gauge bosons. E) mesons and gauge bosons.
While a rock thrown upward at 50 degrees to the horizontal rises, neglecting air drag, its vertical component of velocity
A) increases. B) remains unchanged. C) decreases.
A sound level of 80 dB has twenty times the amplitude of a 60 dB sound
a. True b. False Indicate whether the statement is true or false