
Entropia
Quiz
•
Physics
•
University
•
Hard
Umbelino Neto
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16 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
In which of the transformations is Q=0?
Adiabatic
Isothermal
Ciclic
Isochoric
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si consideri un recipiente contenente un gas perfetto. Inizialmente il volume del recipiente è V1 = 2 l e la pressione P1 = 10 bar; indichiamo inoltre la temperatura con T1. Il gas viene inizialmente scaldato alla temperatura T2 a volume costante; la pressione diventa P2 = 12 bar. Quindi viene diminuito il volume (volume finale V2) a pressione costante, riportando la temperatura a T1. Si calcoli: (a) il rapporto T2/T1; (b) il volume V2.
T2/T1 = 6,4; V2 = 1.7 l
T2/T1 = 1.2; V2 = 3.8 l
T2/T1 = 1.2; V2 = 1.7 l
T2/T1 = 3.8; V2 = 17,4 l
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Una macchina termica
trasforma lavoro in calore
trasforma calore in lavoro
lavora con una sola temperatura
serve solamente a trasformare liquidi in vapore
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Non è una macchina termica
un frigorifero
una centrale termoelettrica
un motore diesel
un martello
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In una macchina termica
L < Q (L lavoro, Q calore assorbito)
L = Qc (L lavoro, Qc calore ceduto)
L > Q (L lavoro, Q calore assorbito)
L < 0
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Il rendimento di una macchina termica è dato da
Q/L (Q calore assorbito, L lavoro compiuto)
L - Q (Q calore assorbito, L lavoro compiuto)
Q - L (Q calore assorbito, L lavoro compiuto)
L/Q (Q calore assorbito, L lavoro compiuto)
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Il rendimento di una macchina termica è dato da
1 - L/Q (Q calore assorbito, L lavoro compiuto)
1 - Qc /Q (Qc calore ceduto, Q calore assorbito)
Q - Qc (Q calore assorbito, Qc calore ceduto)
1 - Q/Qc (Q calore assorbito, Qc calore ceduto)
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