A convex mirror has a focal length of ?20 cm. What is the position of the resulting image (in cm) if the image is upright and four times smaller than the object?
a. ?100
b. ?25
c. ?50
d. ?15
e. ?10
d
Physics & Space Science
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When the Sun passes between the Moon and the Earth, we have
A) a solar eclipse. B) a lunar eclipse. C) met our end.
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How many stars that are within the Milky Way Galaxy are seen in the Hubble Deep Field image?
A) about 10 trillion B) thousands C) an infinite number D) about 100 billion E) several
Physics & Space Science
At the lowest point in a vertical dive (radius = 0.58 km), an airplane has a speed of 300 km/h which is not changing. Determine the magnitude of the acceleration of the pilot at this lowest point
a. 26 m/s2 b. 21 m/s2 c. 16 m/s2 d. 12 m/s2 e. 8.8 m/s2
Physics & Space Science
The moment of inertia about the x axis of the semicircular segment in Problem 5.4 is:
(A) 318 in.4 (B) 362 in.4 (C) 408 in.4 (D) 626 in.4
Physics & Space Science