Estimate the magnitude of the electric field due to the proton in a hydrogen atom at a distance of 5.29 × 10-11 m, the expected position of the electron in the atom
1.10-11 N/C
2.108 N/C
3.1014 N/C
4.106 N/C
5.1012 N/C
5
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A fish is 80 cm below the surface of a pond. What is the apparent depth (in cm) when viewed from a position almost directly above the fish? (For water, n = 1.33.)
a. 50 b. 60 c. 40 d. 70 e. 110
Instructions: On occasion, the notation 
will be a shorthand notation for 
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Starting from one oasis, a camel walks 25 km in a direction 30° south of west and then walks 30 km toward the north to a second oasis. What distance separates the two oases?
A. 15 km B. 48 km C. 28 km D. 53 km E. 55 km
Compare the way an optical and radio astronomer would map the Galaxy
What will be an ideal response?
Buoyancy: The bathyscaphe Trieste consists of a thin-walled but very strong cylindrical hull, 15.2 m long and 3.66 m in diameter, filled with gasoline with a density of 880 kg/m3 to make it buoyant. If it is totally submerged in seawater with a density of 1025 kg/m3 and neither rising nor sinking, what is the weight of the Trieste craft?
A. 127 kN B. 227 kN C. 327 kN D. 427 kN E. 527 kN