An idealized perfect absorber and perfect emitter of radiation.  a. elastic material  b. transponder material  c. Teflon  d. blackbody

An idealized perfect absorber and perfect emitter of radiation.  a. elastic material  b. transponder material  c. Teflon  d. blackbody
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Last Answer : 339.4 K

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For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)  A. p v = constant, if T is kept constant  B. v/T = constant, if p is kept constant  C. p/T = constant, if v is kept constant  D. T/p = constant, if v is kept constant

Description : For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)  A. p v = constant, if T is kept constant  B. v/T = constant, if p is kept constant  C. p/T = constant, if v is kept constant  D. T/p = constant, if v is kept constant

Last Answer : Answer: A

The absolute pressure of a given mass of a perfect gas varies inversely as its volume, when the temperature remains constant. This statement is known as Charles’ law.  A. Yes  B. No

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Last Answer : Answer: B

According to Gay-Lussac law, the absolute pressure of a given mass of a perfect gas varies __________ as its absolute temperature, when the volume remains constant.  A. directly  B. indirectly

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The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by  A. Boyle’s law  B. Charles’ law  C. Gay-Lussac law  D. all of these

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According to Gay-Lussac law for a perfect gas, p/T = constant, if v is kept constant.  A. True  B. False

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Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be  (a) 4.17m3/kgmol  (b) 400 m3/kg mol  (c) 0.15 m3/kg mol  (d) 41.7 m3/kg mol  (e) 417m3/kgmol.

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Last Answer : Answer : a

For which of the following substances, the internal energy and enthalpy are the functions of temperature only  (a) any gas  (b) saturated steam  (c) water  (d) perfect gas  (e) superheated steam.

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Last Answer : Answer : d

A perfect gas at 27°C is heated at constant pressure till its volume is double. The final temperature is  (a) 54°C  (b) 327°C  (c) 108°C  (d) 654°C  (e) 600°C

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According to Avogadro’s Hypothesis  (a) the molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature  (b) the sum of partial pressure of mixture of two gases is sum of the two  (c) product of the gas constant and the molecular weight of an ideal gas is constant  (d) gases have two values of specific heat  (e) all systems can be regarded as closed systems.

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Last Answer : Answer : a

According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant  (a) Joule’s law  (b) Boyle’s law  (c) Regnault’s law  (d) Gay-Lussac law  (e) Charles’ law.

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Last Answer : Answer : e

The condition of perfect vacuum, i.e., absolute zero pressure can be attained at  (a) a temperature of – 273.16°C  (b) a temperature of 0°C  (c) a temperature of 273 °K  (d) a negative pressure and 0°C temperature  (e) can’t be attained.

Description : The condition of perfect vacuum, i.e., absolute zero pressure can be attained at  (a) a temperature of – 273.16°C  (b) a temperature of 0°C  (c) a temperature of 273 °K  (d) a negative pressure and 0°C temperature  (e) can’t be attained.

Last Answer : Answer : a

According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as  (a) temperature  (b) absolute  (c) absolute temperature, if volume is kept constant (d) volume, if temperature is kept constant  (e) remains constant,if volume and temperature are kept constant.

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Last Answer : Answer : c

Which of the following laws is applicable for the behavior of a perfect gas  (a) Boyle’s law  (b) Charles’law  (c) Gay-Lussac law  (d) all of the above  (e) Joule’s law.

Description : Which of the following laws is applicable for the behavior of a perfect gas  (a) Boyle’s law  (b) Charles’law  (c) Gay-Lussac law  (d) all of the above  (e) Joule’s law.

Last Answer : Answer : d

Which of the following variables controls the physical properties of a perfect gas  (a) pressure  (b) temperature  (c) volume  (d) all of the above  (e) atomic mass.

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Last Answer : 7.9 °C

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Last Answer : Convection

_________ is the transition of a given substance from the solid to the gas phase with no intermediate liquid stage.  a. Convection  b. Conduction  c. Radiation  d. Sublimation

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Last Answer : 186,000 miles/second

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Last Answer : 0.1 to 100 µm

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Last Answer : pressure

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Last Answer : shape of the object

Which of the following is the formula for thermal resistance?  A. Thickness of material/ thermal conductivity of material  B. 2(thickness of material)/thermal conductivity of material  C. Thickness of material/ 2(thermal conductivity of material)  D. Thickness of material x thermal conductivity of material

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Last Answer : Thickness of material/ thermal conductivity of material

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Last Answer : It is independent with the surface condition of the material

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Last Answer : (2) decreases with increase in temperature Explanation: According to Wien's displacement law, when the temperature of a blackbody radiator increases, the overall radiated energy increases. ... to its temperature. Shorter-wavelength (higher-frequency) light corresponds to higherenergy photons.

The wavelength at which the peak of intensity of blackbody radiation occurs (1) increases with increase in temperature (2) decreases with increase in temperature (3) is the same at all temperatures (4) does not follow any pattern as temperature changes

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Last Answer : decreases with increase in temperature

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It is used for gas turbines which operates on an open cycle where both the compression and expansion processes take place in rotating machinery.  a. Dual Cycle  b. Otto Cycle  c. Carnot Cycle  d. Brayton Cycle

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Last Answer : Brayton Cycle