A turbine blade made of Udimet 700 must be able to operate at a temperature of 1000°C (1832°F) for a time of 10,000 h between inspections. What is the maximum tensile stress for this blade based upon high-temperature creep rupture?
What will be an ideal response?
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How much heat is required to raise the temperature of a 225-g lead ball from 15.0°C to 25.0°C? The specific heat of lead is 128 J/kg ? K
A) 725 J B) 576 J C) 145 J D) 217 J E) 288 J
The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III
?
The object’s acceleration is negative in region(s)
a.
I.
b.
II.
c.
III.
d.
no regions
An aircraft approaches a runway that runs directly east as a strong wind blows out of the south. The direction that the aircraft should points in order to land on the runway is __________
Fill in the blank(s) with correct word
Which of the following is true of spring tides?
A) They occur at noon and midnight every day. B) They occur at first- and third-quarter moons. C) They occur at dawn and dusk every day. D) They occur at new moon and full moon.