What is the Oort cloud?
A) It's not really a cloud at all, but rather refers to the trillion or so comets thought to orbit the Sun at great distances.
B) It is another name for the cloud of gas from which our solar system was born.
C) It is a great cloud of gas that resides far beyond the orbit of Pluto.
D) It is a giant storm in the atmosphere of Saturn.
A) It's not really a cloud at all, but rather refers to the trillion or so comets thought to orbit the Sun at great distances.
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A barge is 10.0 m wide and 60.0 m long and has vertical sides. The bottom of the hull is 1.20 m below the water surface. What is the weight of the barge and its cargo, if it is floating in fresh water?
A) 3.53 MN B) 6.39 MN C) 6.82 MN D) 7.06 MN E) 9.54 MN
A temperature of 0 Kelvin means there is essentially no motion at the atomic level.
Answer the following statement true (T) or false (F)
A boulder rolls off of a very high cliff and experiences no significant air resistance. While it is falling, its trajectory is never truly vertical
A) True B) False
An image is formed using a convex lens, the image being 15 cm past the lens. A second lens is placed 25 cm past the first lens and another image is formed, this time 10 cm past the second lens. Which of the following statements is always true?
a. Both of the lenses have positive focal lengths. b. The first lens is diverging, and the second is converging. c. The first lens is converging, and the second is diverging. d. None of the above statements is true.