Question: 3 . ( 2 5 ) ( a ) ( 1 0 ) The figure on the left is an SEM image of dust from

3.(25)(a)(10) The figure on the left is an SEM image of dust from World trade Center
collapse. After acquisition of this sample describe what detailed experiments you would
undertake to find the composition of the different components
(b)(5)What are the sizes of the fibers and the particulates?
(c)(10)Also observed are spheroid like structure (figure on right). The accompanied EDS
spectra for the spheroids in shown. Based on these data what is the size of the spheraids
and what is its possible composition?
 3.(25)(a)(10) The figure on the left is an SEM image of

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