The amount of water displaced by a liter-sized block of ordinary wood floating in water is
A) less than 1 liter.
B) 1 liter.
C) more than 1 liter.
D) depends on the water density
E) none of the above
Answer: A
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For a bullet fired horizontally, its ________ velocity will retain a constant non-zero value until it is stopped.
Fill in the blank(s) with the appropriate word(s).
Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km Moon's average distance from Earth = 384,000 km number of arc seconds in 1 radian = 2.06 x 10^5
a. 31 arc seconds b. 187 arc seconds c. 1750 arc seconds d. 1870 arc seconds e. 1910 arc seconds
A uniform rod (mass = 1.5 kg) is 2.0 m long. The rod is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a horizontal position. What is the angular speed of the rod when the rod makes an angle of 30° with the horizontal? (The rotational inertia of the rod about the pin is 2.0 kg/m2)
a. 2.2 rad/s b. 3.6 rad/s c. 2.7 rad/s d. 3.1 rad/s e. 1.8 rad/s
In an article in the New York Times,(75) A. Revkin pointed out that: "In the early 1970s, when scientists first reported that CFCs could destroy ozone, some theorized that the effect would be most discernible in the highest reaches of the
atmosphere over the tropics, partly because of the abundance of sunlight." What happened when the experiments were performed? Explain how the conditions mandated this experimental result.