Determine the change in entropy (in J/K) when 5.00 moles of an ideal gas at 0°C are compressed isothermally from an initial volume of 100 cm3 to a final volume of 20 cm3
a. ?191
b. ?52
c. ?71
d. ?67
e. ?208
d
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What evidence supports the assumption that a large number of living species disappeared about 65 million years ago due to a catastrophic impact?
A. the Chicxulub crater B. the existence of a thin iridium layer of comparable geological age C. the existence of a thin layer of soot of comparable geological age D. All of these choices are correct.
Two mirrors make an angle ? with each other. A light ray is incident on the first mirror at an angle of incidence ?. The reflected ray hits the second mirror at an angle of incidence ?. In terms of ? and ?, what is ??
1. ? – ? 2. ? – ? 3. ?/2 – ? + ? 4. ? – ? – ?
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 __________
Fill in the blank(s) with correct word
A steel hanger with solid cross section has horizontal force P 5 5.5 kN applied at free end D. Dimension variable b 5 175 mm and allowable normal stress is 150 MPa. Neglect self-weight of the hanger. The required diameter of the hanger is approximately:
(A) 5 cm
(B) 7 cm
(C) 10 cm
(D) 13 cm