What is the absolute pressure at a distance 5.00 m below the surface of a lake? Assume the density of the water in the lake is 1000 kg/m3
A)
5.00 × 103 N/m2
B)
1.50 × 105 N/m2
C)
0.49 × 105 N/m2
D)
1.05 × 105 N/m2
E)
4.66 × 105 N/m2
B
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The eastward rotation of Earth causes the Sun, Moon, planets, and stars to move _______________ in the sky
Fill in the blank(s) with correct word
The most important reason an object is observed to be shorter in a frame where it is moving than in a frame where it is at rest is that
A. The force of motion strongly compresses an object that is moving at relativistic speeds. B. “Simultaneity” is not a frame-independent concept. C. The measuring sticks used by the moving observer are Lorentz-contracted. D. The clocks used by the moving observer run slower.
In age, Population I stars are typically much ________ than those of Population II
Fill in the blank(s) with correct word
Two baseballs are released at the same time. One is dropped from rest and the other is given an initial horizontal velocity. Which of the following is not true? Ignore atmospheric drag
a. Both baseballs hit the ground at the same time. b. Both have the same vertical component of velocity as they reach impact. c. The horizontal component of velocity increases at a greater rate than the vertical component of velocity for both while they are both in the air. d. The horizontally-released ball has a greater speed than the other ball for the whole trip.