The circuit below contains three 100-watt light bulbs. The emf ? = 110 V. Which light bulb(s) is(are) the brightest?
a.
A
b.
B
c.
C
d.
B and C
e.
All three are equally bright.
a
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Differential rotation occurs in the __________ Sun; we know this because the ____________ travels faster than the ___________
a. gaseous, equator, poles b. liquid, poles, equator c. solid, equator, poles d. gaseous, poles, equator
Intensity of Sound: A long-term exposure to the sound of a riveting machine can cause your threshold of hearing to shift from 0 dB to 30 dB. What is the sound intensity of a 30-dB sound? The normal lowest detectable intensity is 1.0 × 10-12 W/m2.
Fill in the blank(s) with the appropriate word(s).
Directly above Earth's equator lies the ________ in the sky.
A. Celestial equator B. ecliptic C. North Celestial Pole D. South Celestial Pole
Water at room temperature, 20°C, is pumped into a reactor core where it is converted to steam at 200°C. How much heat (in J) is transferred to each kilogram of water in this process? (csteam = 2 010 J/kg/°C; Lsteam = 2.26 × 10^3 J/g; 1 cal = 4.186 J.)
a. 3.35 × 10^5 b. 7.53 × 10^5 c. 2.67 × 10^6 d. 2.80 × 10^6 e. 3.01 × 10^6