The cosmological redshift is a direct measure of the expansion of the universe, thus independent of direction
Indicate whether the statement is true or false
TRUE
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Determine the molar analysis of standard air (79% N2, 20% O2, and 1% argon, by volume) with 100 ppm of radon gas at 101 kPa, 20ºC.
What will be an ideal response?
Resistors in Combination: What is the equivalent resistance between points A and B of the network shown in the figure?
Fill in the blank(s) with the appropriate word(s).
Why is a planet's thermosphere warm?
A) It absorbs x-rays. B) It absorbs infrared light. C) It absorbs visible light. D) It contains greenhouse gases. E) It absorbs ultraviolet light.
A 0.42-kg quantity of ethanol, in the liquid state at its melting point of -114.4°C, is frozen at atmospheric pressure. The heat of fusion of ethanol is 1.04 × 105 J/kg, and its molecular mass is 46.1 g/mol
What is the change in the entropy of the ethanol as it freezes? A) 280 J/K B) -280 J/K C) -310 J/K D) 250 J/K E) -250 J/K