Which of the following would correctly convert a Fahrenheit temperature (F) to a Kelvin (K) value?
A) K = (5/9)(F - 32)
B) K = (5/9)F + 255
C) K = (5/9)F - 273
D) K = (9/5)F + 273
E) K = (9/5)(F - 32 ) + 273
B
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A conducting sphere of radius 20 cm has a charge Q placed on it producing a field of magnitude
at its surface. More charge is added to the surface until the magnitude of the field at the surface is 2
How much charge was added to the surface?
A. Q/2 B. Q C. 2 Q D. 1.4 Q E. 3 Q
Through the year, the Sun moves eastward among the stars following a line called the _____, the apparent path of the Sun among the stars
A) zenith B) nadir C) ecliptic D) zodiac
The intensity of radiation reaching the Earth from the Sun is 1350 W/m2. The Earth's radius is 6.4 × 106 m. How big a force does this radiation exert on the Earth? (Assume it is all absorbed.)
A. 5.8 × 108 N B. 1.2 × 109 N C. 2.3 × 109 N D. 4.6 × 109 N E. 1.7 × 1017 N
Which of the following statements is not true?
a. Displacement has a direction and a magnitude. b. Acceleration has a magnitude only. c. Speed has a magnitude only. d. Velocity has a magnitude and a direction.