A boat loaded with scrap iron floats in a swimming pool. When the iron is thrown overboard, the pool level will
A) rise.
B) fall.
C) remain unchanged.
Answer: B
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A steel pipe column (E 5 210 GPa) with length L 5 4.25 m is constructed of circular tubing with outside diameter d2 5 90 mm and inner diameter d1 5 64 mm. The pipe column is fixed at the base and pinned at the top and may buckle in any direction. The Euler buckling load of the column is most nearly:
(A) 303 kN
(B) 560 kN
(C) 690 kN
(D) 720 kN
Transverse waves travel with a speed of 283 m/s along a taut copper wire that has a diameter of 1.50 mm. What is the tension in the wire? (The density of copper is 8.93 g/cm3.)
a. 1890 N c. 631 N b. 1260 N d. 315 N
Based on what we know about our own solar system, the discovery of hot Jupiters came as a surprise to scientists because these planets are __________.
Fill in the blank(s) with the appropriate word(s).
If the visible wavelengths of light range from 400 nm to 750 nm, what is the highest frequency associated with visible light?
A) 3.0 × 108 Hz B) 7.5 × 1014 Hz C) 2.3 × 1020 Hz D) 4.0 × 1014 Hz E) 5.0 × 108 Hz