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MATSE 81, Examination 02 Lessons 5-8 Questions And Answers
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MATSE 81, Examination 02 Lessons 5-8 Questions And Answers
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Solution 2024/2025Pepper
MATSE 81, Examination 02: Lessons 5-8
Questions And Answers
According to the course reading, this metal was the first metal processed by the Egyptians
Gold
According to the course reading, the Egyptians used tin to do this.
Make copper harder
A crystal structure is:
the manner in which ordered materials are spatially arranged.
The atoms in a hexagonal close packed lattice occupy the following locations:
the corner of each hexagon, in the center of each hexagon and a triangle of three in between the hexagons
For the cubic crystal system:
a = b = c and all the interaxial angles are equal to 90°
The hexagonal closed packed structure:
has the stacking sequence of ABABAB...
An isotropic material:
is a material in which properties are independent on which crystallographic direction the measurements are taken.
A self-interstitial is a:
point defect in which an extra atom is occupying space not normally occupied in the crystal.
In a substitutional solid solution, impurity atoms:
replace host atoms.
A screw dislocation is a:
twisting defect caused by the application of a shear force.
In Metal: The Secret Life of Materials, the narrator, Mark Miodownik, thinks “There’s something _______ but wonderful
about Piccadilly Circus.”
strange
, Solution 2024/2025
Pepper
According to the video, the dawn of civilization occurred where:
Africa meets Asia.
According to Mark Miodownik, to make your fire very, very hot you need lots of:
air.
In the video, an advantage of metal tools over stone, bone or wood tools was:
that it can be repaired.
When you hit a metal, the metal:
gets stronger.
Melting of iron occurred when it was realized:
that using coke as a fuel made hotter fires.
Henry Bessemer, with help from Robert Forrester Mushet, developed a way to:
mass produce large quantities of quality steel.
The Bessemer process was finally a success when Bessemer:
removed all the carbon and then added back in the amount desired.
Wilm discovered to make aluminum stronger he needed to:
age the material, which resulted in the growth of tiny crystals.
A lattice is:
a three-dimensional array of points coinciding with atom positions.
For the tetragonal crystal system:
a = b ≠ c and all the interaxial angles are equal to 90°
In a unconstitutional solid solution, impurity atoms:
replace host atoms.
An edge dislocation is a:
linear defect that centers on the line that is defined along the end of the extra half-plane of atoms.
In the video, the main property of metals that distinguished it from stone, bone and wood, is because it is:
strong.
When you hit a metal, the atoms:
, Solution 2024/2025
Pepper
form a wave of shuffling atoms.
The secret of steel's strength was discovered by:
etching.
The face centered closed packed structure:
has the stacking sequence of ABCABC...
A polycrystalline material:
is composed of a collection of many small crystals
A vacancy is a:
point defect in which an atom is missing from a lattice site in the crystal.
Iron replacing bronze was delayed because:
iron is difficult to work with.
What percentage of metal produced today is steel?
90%
To see deep inside metals, professor Sir Peter Hirsch used:
a transmission electron microscope.
According to the course reading, copper is found most readily in this form.
Copper carbonate
According to the course reading, this is one property of gold.
Malleable
A unit cell is:
the small group of atoms that when repeated form the complete material
The atoms in a face centered cubic lattice occupy the following locations
the corners and the center of each face of a cube
In an interstitial solid solution, impurity atoms:
squeeze between host atoms.
In Metal: The Secret Life of Materials, for the narrator, Mark Miodownik, the story of materials
the most exciting story of science.
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