How can cell phones promote development in Sub-Saharan Africa?
What will be an ideal response?
Answers should talk about coordination among businesses, job creation, mobile banking, for mobile "money."
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Chlorofluorocarbons are compounds that were not appreciably present in the atmosphere before 1950 and have a significant role in catalyzing decomposition of stratospheric ozone
Indicate whether the statement is true or false
Momentum is transferred to the ground when an apple falls on it. The momentum absorbed by the ground is
A) negligible compared to the momentum of the apple. B) greater than that of the apple only if the apple bounces. C) greater than that of the apple in all cases. D) none of the above
Contact metamorphism along sills and dikes may produce metamorphosed zones many kilometers wide
Indicate whether the statement is true or false
The polar front jet stream blows ____
A) directly from west to east B) directly from east to west C) from the equator towards the poles D) in a wavy pattern from west to east