Near the earth the intensity of radiation from the sun is 1.35 kW/m2. What volume of space in this region contains 1.0 J of electromagnetic energy? (c = 3.0 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2)
A) 4.5 × 10-6 m3
B) 3300 m3
C) 7.4 × 10-4 m3
D) 1400 m3
E) 220,000 m3
Answer: E
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When frozen water on the surface of Mars heats up during summer time, the water
a. melts and forms liquid pools on the surface. b. boils off the surface and escapes into outer space. c. sublimates and goes directly into the gaseous phase. d. remains frozen because the temperature remains below the freezing point. e. melts and creates flowing rivers that erode the landscape.
Observing Galilean moons: The Galileo spacecraft launched towards Jupiter carried a small telescope (about 25 cm diameter) for collecting visible light images
Explain why these collect images with much better spatial resolution than even the largest Earth-bound telescopes (for example, the 10 meter Keck telescopes).
The second law of thermodynamics implies that
A) non-thermal forms of energy cannot be entirely converted into thermal forms of energy. B) thermal energy cannot be entirely converted into non-thermal forms of energy. C) from the microscopic point of view, thermal energy is just kinetic energy of individual atoms and molecules. D) in physical process in which heat is produced, the total amount of energy is reduced by an amount equal to amount of heat produced. E) in every physical process, the total amount of energy must remain unchanged.
The ______________ of a given solute is the amount of solute that will dissolve in a specified mass of solvent at a given temperature to produce a saturated solution
Fill in the blank(s) with correct word