A Udimet 700 turbine blade is exposed to a temperature of 1200 K (2160 R) at a tensile stress of 140 MPa (20 ksi)? How many hours is the turbine blade expected to survive these conditions?
What will be an ideal response?
The Larson-Miller parameter for these conditions from Figure 9.8 is
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Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard. The reason he doesn't slip off the skateboard is due to
A) inertia in motion. B) momentum change. C) friction between his feet and the board.
An ideal gas in a balloon is kept in thermal equilibrium with its constant-temperature surroundings. How much work is done by the gas if the outside pressure is slowly reduced,
allowing the balloon to expand to 6.0 times its original size? The balloon initially has a pressure of 645.0 Pa and a volume of 0.10 m3. The ideal gas constant is R = 8.314 J/mol ? K. A) 120 J B) 390 J C) -330 J D) 6.0 J
A maximum in the potential energy curve represents a point of
A) neutral equilibrium. B) stable equilibrium. C) unstable equilibrium. D) positive equilibrium. E) negative equilibrium.
As ocean currents carry warm water from equatorial regions northward, lands bordering the ocean are warmed. A prime example of such warming is the
A) Doldrums. B) Coriolis force. C) Gulf Stream. D) Horse latitudes.