Which of the following composite materials could be recycled by melting the shredded composite and form recycled pellets with uniform properties?
(a) Epoxy matrix and carbon fibers
(b) PP matrix and glass fibers
(c) PP matrix and PP fibers
(d) PP matrix and PE fibers
(c) PP matrix and PP fibers
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What space mission has collected data on Vesta, with its next destination to be Ceres?
a. New Horizons b. HST c. SOHO d. Dawn e. Deep Impact
Gravitational lensing of distant, faint irregular galaxies may be the key to
A) understanding galactic rotation curves. B) understanding active galactic nuclei. C) quasar energy production. D) mapping dark matter. E) determining galactic redshifts.
An athlete doing push-ups performs 650 kJ of work and loses 425 kJ of heat. What is the change in the internal (thermal) energy of the athlete?
A) -225 kJ B) -1075 kJ C) 1075 kJ D) 225 kJ E) 276 kJ
The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
a.
D.
b.
E.
c.
F.
d.
G.
e.
H.