Heat & Thermodynamics

Q: given that P=10⁴N/m²,area of the piston=0.1 m² and the distance moved by the piston=10¯¹cm,then the work done by the gas is

(a) :  1 J
(b) :  10⁵ J
(c) :  10⁴ J
(d) :  10 J
(e) :  None of the Above
Answer:  1 J
Explanation:  

Q: Tick the examples of an irreversible process :

(a) :  Evaporation and liquefaction
(b) :  Work done by friction and explosion
(c) :  Work done by friction and liquefaction
(d) :  Evaporation and explosion
(e) :  None of the Above
Answer:  Work done by friction and explosion
Explanation:  

Q: Electromagnetic waves emitted by hot bodies are called:

(a) :  Photoelectrons
(b) :  Alpha rays
(c) :  Thermal radiation
(d) :  None of these
(e) :  None of the Above
Answer:  Thermal radiation
Explanation:  

Q: the equation W=-ΔU represents

(a) :  isothermal process
(b) :  adiabatic process
(c) :  isobaric process
(d) :  none of these
(e) :  None of the Above
Answer:  adiabatic process
Explanation:  

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