The horizontal pressure gradient force is proportional to:
A) the speed necessary to achieve hydrostatic equilibrium.
B) the change in temperature expressed in Kelvin degrees.
C) the change in air density.
D) the spacing between isobars.
Answer: D
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Our current agricultural technology is based on using large amounts of fossil fuels, particularly petroleum. Propose a hypothesis that predicts what will happen if we run out of petroleum.
What will be an ideal response?
Metamorphism is a physical and chemical change that occurs in such a way that:a
disequilibrium is reached with the new physical and chemical environment. b. a dynamic equilibrium is reached. c. equilibrium with the new environment is disturbed. d. the rock reaches equilibrium with its new environment. e. the rock's chemistry and texture become increasingly unstable
Recent research that analyzed the content of commercial bottled water indicates that ________
A) bottled water is significantly cheaper than tap water B) bottled water is no safer or purer than most samples of tap water C) bottled water has no contamination from hormone mimic plasticizers D) bottled water consumes less fossil fuels in reaching the consumer than does tap water E) all surveyed brands had information about the source and how it was treated
You take a block of granite and heat it to 1000 degrees Kelvin, and it glows bright red. If you then heat it to 1200 Kelvin, how might it look different?
A) It would be brighter and more white. B) It would be about the same brightness but white. C) It would be much brighter and red. D) None of the above; it would have melted, and once it melts, it will no longer emit.