A cylindrical rod of length 12 cm and diameter 2.0 cm will just barely float in water of density 1000 kg/m3. What is its mass?
A) 75 g B) 150 g C) 38 g D) 300 g
C
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Without the greenhouse effect, the oceans on the Earth's surface would
A) have evaporated B) be much the same as they are today C) have covered the entire surface of the Earth D) be frozen
_________occurs when there is a change in resistivity in a ferromagnetic material resulting from an application of a magnetic field.
Fill in the blank(s) with the appropriate word(s).
A metal rod of length L in a region of space where a constant magnetic field points into the page rotates clockwise about an axis through its center at constant angular velocity ?. While it rotates, the point(s) at lowest potential is(are)
A. A. B. B. C. C. D. D. E. A and E.
At their closest approach, Venus and Earth are 4.20 × 1010 m apart. The mass of Venus is 4.87 × 1024 kg, the mass of Earth is 5.97 × 1024 kg, and G = 6.67 x 10-11 N•m2/kg2. What is the force exerted by Venus on Earth at that point?
A) 1.10 × 1018 N B) 4.62 × 1028 N C) 5.43 × 1026 N D) 6.30 × 1020 N E) 1.72 × 1019 N