A material through which heat conducts slowly is called a __________
Fill in the blank(s) with correct word
thermal insulator
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RMS and Peak Quantities: What is the peak voltage in an ac circuit where the rms voltage is 120 V?
A. 84.8 V B. 120 V C. 170 V D. 240 V
What happens during the apparent retrograde motion of a planet?
A. The planet rises in the west and sets in the east. B. The planet moves backward through the sky over the course of a night. C. The planet appears to move westward with respect to the stars over a period of many nights. D. The planet moves backward in its orbit around the Sun.
Given that our galaxy has a volume of approximately 8 1012 ly3, what would be the average minimum amount of time to exchange messages between civilizations if there are currently 125,000 intelligent civilizations in our galaxy?
A) 800 years B) 1,200 years C) 200 years D) 400 years
The intensity of light from the Sun is 1.3 kW/m2 at the distance of the Earth. The Earth's radius is 6.4 × 10^6 m. If all the sunlight that hits the Earth were absorbed, what would be the magnitude of the resulting force on the Earth?
a. 0.0087 N c. 5.6 × 10^8 N b. 1.8 × 10^8 N d. 87 N