During a lunar eclipse the Moon's phase must be
A) 3rd quarter. B) 1st quarter. C) new. D) full.
D
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At temperatures above the equi-cohesive temperature, the crystalline areas are _________than the grain boundaries.
Fill in the blank(s) with the appropriate word(s).
Why are X-rays and gamma rays considered dangerous forms of light? a. These forms of light are only produced by large, dangerous machines. b. There is no form of protection from these forms of light
c. These forms of light break through Earth's atmosphere. d. Photons of these wavelengths have high energy. e. These forms of light cause sunburn.
An expandable container holds 2.30 mole of He gas with an initial pressure of 770 kPa and an initial volume of 2.10 L. The gas expands isothermally to a final pressure of 350 kPa. How much heat is gained by the gas in this process?
A) 1280 J B) 792 J C) 685 J D) 1370 J E) 1700 J
A spherical fruit has a radius of 3.23 cm. What is the volume of the fruit in cubic meters?
A) 1.41 × 10-4 m3 B) 1.41 m3 C) 4.23 × 10-4 m3 D) 4.23 m3