Earth and Venus have more substantial atmospheres because they are larger and had more volcanic activity.
Answer the following statement true (T) or false (F)
True
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Resistance and Resistivity: A certain metal wire has a cross-sectional area of 1.0 cm2 and a resistivity of 1.7 × 10-8 ? ? m. How long would it have to be to have a resistance of 1.0 ??
A. 5.9 × 106 m B. 5.9 m C. 5.9 × 104 m D. 590 m E. 5.9 km
Molar Specific Heats: A certain ideal gas has a molar specific heat at constant pressure of 33.2 J/mol ? K. Its molar specific heat at constant volume is closest to which of the following values? (R = 8.31J/mol ? K)
A. 41.9 J/mol ? K B. 16.6 J/mol ? K C. 25.1 J/mol ? K D. 24.9 J/mol ? K E. 49.8 J/mol ? K
Photon Energy: The human eye can just detect green light of wavelength 500 nm if it arrives at the retina at the rate of 2 × 10-18 W. How many photons arrive each second? (c = 3.0 × 108 m/s, h = 6.626 × 10-34 J ? s)
Fill in the blank(s) with the appropriate word(s).
A plucked guitar string produces a sound wave of frequency 440 Hz
(a) What is the wavelength of the sound wave (assume the speed of sound in air is 340 m/s)? (b) How much time elapses between the impacts of two adjacent compressions on your eardrum?