This is the gross value of a product minus the cost of raw materials and energy
A) productivity
B) value added
C) GDP
D) GNI
E) PPP
Answer: B
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One coulomb is the charge on
A. one proton. B. one electron. C. a specific large number of electrons. D. none of the above
The success of Geographic Information Systems is primarily due to the use of this technology
A) shipping B) the World Wide Web C) computers D) global satellites
How have scientists used isotopic analysis to determine the rise of atmospheric CO2 is mostly from the burning of fossil fuels?
A) Since 14C is an unstable isotope, scientists have dated the atmospheric carbon to the period since the Industrial Revolution. B) Both coal and oil contain a high proportion of 14C. By analyzing, 14C/12C ratios, scientists have been able to determine the source based on this fact. C) The low proportions of 13C and 14C within atmospheric CO2 indicates the source is fossil carbon. D) 14C concentrations are much higher in urban areas than in rural areas, indicating fossil fuels must have a higher 14C/12C ratio than carbon from other sources.
Which of the following statements is true of all electromagnetic radiation?
A) All electromagnetic radiation has the same frequency. B) All electromagnetic radiation has the same wavelength. C) All electromagnetic radiation travels at the same speed in a vacuum. D) none of the above