Sublimation is to change from
2 answers:
Answer:
The process in which a solid changes directly into gaseous form, without transcurring to the "intermediate-form" which would be the liquid form.
Explanation:
Some elements or substances can go directly from solid to gaseous form, and that process is called sublimation.
A common example of sublimation would be the sublimation of dry-ice, which is solid . When the temperature of the dry ice reaches -78.5 ºC or higher, it will start becoming a gas.
Remember:
Solid → gas = sublimation
Solid → liquid = fusion
Gas → liquid = condensation
Gas → solid = deposition
Liquid → gas = evaporation
Liquid → solid = solidification
Hope it helped,
BiologiaMagister
You might be interested in
Answer:
a) The ductility = -30.12%
the negative sign means reduction
Therefore, there is 30.12% reduction
b) the true stress at fracture is 658.26 Mpa
Explanation:
Given that;
Original diameter = 12.8 mm
Final diameter = 10.7
Engineering stress = 460 Mpa
a) determine The ductility in terms of percent reduction in area;
Ai = π/4( )² ; Ag = π/4(
)²
% = π/4 [ ( ( )² - (
)²) / ( π/4 (
)²) ]
= ( ( )² - (
)²) / (
)² × 100
we substitute
= [( (10.7)² - (12.8)²) / (12.8)² ] × 100
= [(114.49 - 163.84) / 163.84 ] × 100
= - 0.3012 × 100
= -30.12%
the negative sign means reduction
Therefore, there is 30.12% reduction
b) The true stress at fracture;
True stress =
( 1 +
)
is engineering strain
= dL / Lo
= (do² - df²) / df² = (12.8² - 10.7²) / 10.7² = (163.84 - 114.49) / 114.49
= 49.35 / 114.49
= 0.431
so we substitute the value of into our initial equation;
True stress = 460 ( 1 + 0.431)
True stress = 460 (1.431)
True stress = 658.26 Mpa
Therefore, the true stress at fracture is 658.26 Mpa