Exactly 500 grams of ice are melted at a temperature of 32°F. (Lice = 333 J/g.) The change in entropy (in J/K) is
a. 321
b. 146
c. 512
d. 610
e. 5 230
D
Physics & Space Science
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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?
Physics & Space Science
The last page of a book is numbered 764. The book is 3.0 cm thick. What is the average thickness of a sheet of paper in the book, in centimeters?
A) 0.0039 B) 0.0078 C) 127.3 D) 0.072 E) 254.7
Physics & Space Science
A 101-MHz radio wave has vibrations per second of
A) less than 101,000,000. B) 101,000,000. C) more than 101,000,000.
Physics & Space Science
Halo stars are all Population II objects
Indicate whether the statement is true or false
Physics & Space Science