The length of the telescope is 1.60 m, and it has a magnification of 60.0. What is the focal length of the objective lens?
A) 60.0 cm
B) 157 cm
C) 100 cm
D) 128 cm
E) 96.0 cm
B
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If a gram of antimatter meets a kilogram of matter, the amount of mass to survive is
A) 1 gram. B) 999 grams. C) 1 kilogram. D) 1.1 kilogram.
A 20 N ball and a 40 N ball are dropped at the same time from a height of 10 meters. Air resistance is negligible. Which of the following statements is accurate?
A. After 1 second has elapsed, both balls have the same kinetic energy, since they have the same acceleration B. Both balls hit the ground at the same time but gravity does more work on the heavy ball than on the light ball C. The heavy ball has a greater acceleration and falls faster D. The light ball has a greater speed, since it can accelerate faster than the heavy ball
The principal landform resulting from a stream's erosive power is its ______________-shaped valley
a. V b. W c. M d. I
If I = 2.0 A in the circuit segment shown below, what is the potential difference VB ? VA?
a.
+10 V
b.
?20 V
c.
?10 V
d.
+20 V
e.
+30 V