Consider a submarine at a depth of 67. meters in sea water (density 1.03 grams/cc) and the interior of the sub is at 1.0 atmosphere
(a) What is the outside pressure at that depth?
(b) Find the total force that must be withstood by a square hatch (0.90 m square) which leads to the sub interior.
(a) 6.8 × 105 Pa = 6.7 atm
(b) 0.47 MN
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A vertical tube one meter long is open at the top. It is filled with 75 cm of water. If the velocity of sound is 344 m/s, what will the fundamental resonant frequency be (in Hz)?
a. 3.4 b. 172 c. 344 d. 1.7 e. 688
Like Mars and Venus, Earth originally had a significant amount of carbon dioxide in its atmosphere. Where is the majority of the carbon now?
a. It has escaped into outer space. b. It is bound up in the plant life on Earth. c. It is bound up in rocks. d. It is dissolved into the oceans. e. It is still in the atmosphere in the form of complex molecules.
The ESA's GAIA project will be able to measure parallax and stellar properties of about how many stars?
A) one million B) ten thousand C) one billion D) one hundred billion E) None; it has a different purpose.
The inductance of a tuning circuit of an AM radio is 4.00 mH. Find the capacitance of the circuit required for reception at 1200 kHz.
A. 2.10 pF B. 4.40 pF C. 21.2 pF D. 43.4 pF E. 27.6 pF