A design requires a material that must have a high melting temperature, high stiffness, high compressive strength, low density, and low cost. Which of the following materials is most likely to best satisfy the design requirements?
(a) Alumina ceramic
(b) Carbon steel
(c) Polyethylene
(d) Graphite-reinforced-epoxy composite
(a) Alumina ceramic
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At solar noon on the summer solstice, the Sun is located ________.
A. 23.5 degrees above the horizon B. 23.5 degrees below the Celestial Equator C. 23.5 degrees above the ecliptic D. 23.5 degrees above the Celestial Equator E. 23.5 degrees below the ecliptic
The discovery of Charon was significant because it allowed astronomers to determine the ________ and ________ of Pluto.
A. radius; speed B. age; mass C. speed; distance D. distance; age E. mass; radius
A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of equal mass moving with a velocity of -2.0 m/s. What is the velocity of the red ball after the collision?
A) zero B) -2.0 m/s C) +3.0 m/s D) +2.5.0 m/s E) +5.0 m/s
When a nucleus in an excited state decays to the ground state, a(n) __________ particle is emitted
Fill in the blank(s) with correct word