The gas motions within granules on the solar surface are
a. upward in the centers of some cells and downward in others; the gas cools as it passes between individual granules.
b. actually motionless. The dark regions are absorption features from gases in the photosphere.
c. upward in the bright cell centers and downward around the darker edges.
d. downward in the bright cell centers and upward around the darker edges.
c
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Which of the following statements correctly describes the law of conservation of energy?
A) An object always has the same amount of energy. B) Energy can change between many different forms, such as potential, kinetic, and thermal, but it is ultimately destroyed. C) Energy can change between many different forms, such as potential, kinetic, and thermal, but the total quantity of energy in the universe never changes. D) The fact that you can fuse hydrogen into helium to produce energy means that helium can be turned into hydrogen to produce energy. E) It is not really possible for an object to gain or lose potential energy because energy cannot be destroyed.
The existence of the neutrino was postulated to account for which basic conservation laws during the beta decay process?
a. conservation of energy b. conservation of momentum c. Both choices a and b are valid. d. None of the above choices are valid.
A waterfall is 128 m high. What is the increase in water temperature at the bottom of the falls if all the initial potential energy goes into heating the water? (g = 9.8 m/s2, cw = 4 186 J/kg/°C)
a. 0.15°C b. 0.30°C c. 0.90°C d. 0.37°C e. 0.60°C
(a) At what Celsius temperature is the average kinetic energy of a helium gas atom equal to 6.21 × 10-21 J? The Boltzmann constant is 1.38 × 10-23 J/K
(b) What would be the temperature for radon gas? What will be an ideal response?