The Hubble time is actually the age the Universe would be if it were totally closed
Indicate whether the statement is true or false
False
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A part for a land-based gas-turbine made of Haynes 25 must carry a tensile stress of 140 MPa (20 ksi). For a design lifetime of 10 years, what is the allowable temperature for this part, based only upon high-temperature creep rupture?
What will be an ideal response?
A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, the person's power output is 1,200 W
a. True b. False Indicate whether the statement is true or false
The current in amperes drawn by the heater is
a. 0.1 c. 144,000 b. 10 d. none of the above
If an object travels at a constant speed in a circular path, the acceleration of the object is
A) larger in magnitude the smaller the radius of the circle. B) in the same direction as the velocity of the object. C) smaller in magnitude the smaller the radius of the circle. D) in the opposite direction of the velocity of the object. E) zero.