The Antarctic Bottom Water in the Pacific retains its characteristics for up to 1,600 years
Indicate whether the statement is true or false
True
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Why might the following nuclear reaction not be very good for energy production in a fission reactor? U ? Ba + Kr + 1 neutron
A) The material only produces one neutron so the chain reaction will not be very efficient. B) The products are too large. C) There are too many products produced. D) The mass of the byproducts is too high and therefore the energy released will not be high enough. E) Interatomic attraction between the products will impede the efficient separation of the atoms from the unstable nuclei.
According to data from lightning detection networks, the average thunderstorm across the continental United States and Canada produces ________ lightning strikes
A) 36 B) 100 C) 200 D) 280
Sediments deposited by glacial ice are ________; material deposited by glacial meltwater are ________
A) sorted; sorted B) unsorted; unsorted C) unsorted; sorted D) sorted; unsorted
Which of the following materials probably has the highest permeability?
A. compacted clay with moderate porosity B. highly porous volcanic rock with holes that are isolated from one another C. unfractured granite D. loosely cemented sand and gravel