Calculate the pressure exerted on the ground due to person standing on one foot if the bottom of the person's foot is wide and long
A) 2.1 × 104 Pa
B) 2.2 × 103 Pa
C) 4.8 × 104 Pa
D) 5.3 × 104 Pa
A
You might also like to view...
The two most abundant elements in the sun are
a. nitrogen and oxygen. b. hydrogen and helium. c. sulfur and iron. d. carbon and hydrogen. e. carbon and nitrogen.
Most of the carbon dioxide on Venus
A) has frozen out in the polar regions B) is dissolved in oceans of liquid water, forming carbonate rocks C) is still present in the atmosphere D) has escaped into space
When a gas changes phase to become a solid, energy is
A) absorbed. B) released. C) unchanged.
Research has shown that Arctic plants are more injured by increased ultraviolet radiation than by global warming (see Ch. 17)
(77) The authors of the study say "there is a growing belief that ozone depletion is of only minor environmental concern because the impacts of UV-B radiation on plant communities are often very subtle. Here we show that 5 years of exposure of a subarctic heath to enhanced UV-B radiation both alone and in combination with elevated CO2 resulted in significant changes in the C:N ratio and in the bacterial community structure of the soil microbial biomass." What might this mean about the future Arctic ecology? Explain.