Which feature of Neptune's atmosphere has disappeared since the Voyager 2 fly-by?
a. white methane clouds
b. Great Dark Spot
c. belt-zone circulation
d. Great Red Spot
e. its bluish hue
a
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The higher the temperature of an object, the
A) longer the wavelengths it radiates. B) shorter the wavelengths it radiates. C) makes no difference in the wavelengths it radiates
Astronauts in orbit around Earth feel weightless because
A) they are moving with constant velocity. B) no forces at all are acting on them. C) they must lose weight for the space program. D) there is no gravity out there. E) they are in "free fall" around Earth.
A 5.0-liter gas tank holds 1.4 moles of helium (He) and 0.70 moles of oxygen (O2 ), at a temperature of 260 K
The atomic masses of helium and oxygen are 4.0 g/mol and 16.0 g/mol, respectively. Avogadro's number is 6.022 × 1023 molecules/mol and the Boltzmann constant is 1.38 × 10-23 J/K. The total random translational kinetic energy of the gas in the tank is closest to A) 6.8 kJ. B) 6.1 kJ. C) 7.6 kJ. D) 8.3 kJ. E) 9.1 kJ.
A muonic hydrogen atom is a proton orbited by a muon (a particle with the same charge as an electron and 207 times its mass) in which the mass of the muon is significant relative to the mass of the proton
What would be the radius of the smallest muon orbit in a muonic hydrogen atom? A) 1.10 × 10-8 m B) 1.03 × 10-8 m C) 2.84 × 10-13 m D) 2.56 × 10-13 m E) 5.29 × 10-11 m