The objective lens of a telescope has a focal length of 2.0 m and its eyepiece has a focal length of 1.0 cm. What is the magnification of this telescope when viewing Jupiter?
A) 0.0050
B) 0.50
C) 2.0
D) 20
E) 200
E
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Earth has roughly _________ times more atmospheric pressure than Mars and _________ times less than Venus.
a. 10; 10 b. 200; 100 c. 2,000; 2 d. 2; 10 e. 1,000; 200
-rays of energy 2.9 × 104 eV are scattered by a free stationary electron through an angle of 135°. What is the energy of the scattered X-rays, in electron volts?
(mel = 9.11 × 10-31 kg, e = - 1.60 × 10-19 C, h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J) What will be an ideal response?
Of the three agents of erosion—water, wind and ice—the one with the ability to move only the smallest particles is
A) ice. B) water. C) turbulent water. D) wind.
Where must an object be placed with respect to a converging lens of focal length 30 cm if the image is to be virtual, and three times as large as the object?
What will be an ideal response?