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Ductility
It is the
mechanical property which is a measure of degree of plastic deformation that
has been sustained at fracture. It is expressed quantitatively as either
percent elongation or percent reduction in area from a tensile test.
Dulong
& Petit’s Law
It is the law
which states that the atomic heat capacity for all solids is same and is nearly
equal to 25 Jmol-1K-1 and is independent of
temperature.
Dwarf
Star
It is small and
low mass star that emits relatively less amount of light. Most dwarf stars, including sun, burn their
hydrogen at a much slower rate than giant and super giant stars and are
consequently less luminous and have longer life spans that those main sequence
stars do.
Dynamics
The branch of
classical mechanics that is concerned with effects of forces on motion of a
body or system of bodies, especially of forces that do not originate within the
system itself is called as dynamics.
Dynamo
Meter
Device used for
measuring the force or torque or power available from a rotating shaft.
Dynamo
It is an electrical device which converts
mechanical energy into electrical energy utilizing the phenomenon of
electromagnetic induction.
Dyne
It is unit of force specified in CGS system
of units.
1 dyne = 10-5 Newtons
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