A barge is 10 m wide and 60 m long and has vertical sides. The bottom of the boat is 1.2 m below the water surface. What is the weight of the barge and its cargo, if it is floating in fresh water of density 1000 kg/m3?

A) 3.5 MN
B) 6.4 MN
C) 6.8 MN
D) 7.1 MN
E) 9.5 MN


D

Physics & Space Science

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A single slit, which is 0.050 mm wide, is illuminated by light of 550 nm wavelength. What is the angular separation between the first two minima on either side of the central maximum?

A) 0.36° B) 0.47° C) 0.54° D) 0.63° E) 1.3°

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The primary types of chemical bonding in ceramics are ionic and _________.

Fill in the blank(s) with the appropriate word(s).

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The spectral lines of atomic spectra are

A) images of the slit in a spectroscope. B) orderly, and even predictable. C) as an identity of atoms as fingerprints are of people. D) all of the above E) none of the above

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Ten kilograms of water at 0°C is mixed with 10 kg of water at 100°C. The change in entropy (in cal/K) of the system is

a. 1 000 b. 480 c. ?720 d. 240 e. ?168

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