What is the impedance at 1500 Hz if a 100-? resistor, 20-mH coil, and 1.0-?F capacitor are connected in series?
A) 0.19 k? B) 82 ? C) 0.13 k? D) 0.11 k?
C
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The intensity of radiation reaching the Earth from the Sun is 1350 W/m2 . The Earth's radius is 6.4 × 10^6 m. How big a force does this radiation exert on the Earth? (Assume it is all absorbed.)
a. 5.8 × 10^8 N b. 1.2 × 10^9 N c. 2.3 × 10^9 N d. 4.6 × 10^9 N e. 1.7 × 10^17 N
The apparent path that the Sun traces annually along the celestial sphere is called the
a. ecliptic. b. heliosphere. c. solstice circle. d. celestial prime meridian.
Geology's best tool for establishing absolute (numerical) geologic time is called ______________ dating
Fill in the blank(s) with correct word
A 5.0-kg mass is suspended by a string from the ceiling of an elevator that is moving upward with a speed which is decreasing at a constant rate of 2.0 m/s in each second. What is the tension in the string supporting the mass?
a. 49 N b. 39 N c. 59 N d. 10 N e. 42 N