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8 In An object having emissivity 0.0867 radiates heat at 20 W, and temperature is T. IT is doubled, what is the rate at which it radiates heat? a) 16 W b) 64 W c) 240 W d) 320 W

8 In An object having emissivity 0.0867 radiates heat at 20 W, and temperature is T. IT is doubled, what is the rate at which it radiates heat? a) 16 W b) 64 W c) 240 W d) 320 W

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8 In An object having emissivity 0.0867 radiates heat at 20 W, and temperature is T. IfT is doubled, what is the rate at which it radiates heat? a) 16 W b) 64 W c) 240 W d) 320 W 9. Which one of the following properties of a gas is NOT consistent with the kinetic theory of gasses? a) The average speed of the gas molecules is smaller at higher. b) Gas molecules are widely separated. temperatures c) Gases fill whatever space is available to them. d) Gas molecules move rapidly in a random fashion 10. How much heat is radiated per second by a person of body temperature 100 °C. body area 2.8 m², and emissivity 0.25? a) 1000 J/s b) 255J/s c) 556 J/s d) 768 J's
Transcribed Image Text:8 In An object having emissivity 0.0867 radiates heat at 20 W, and temperature is T. IfT is doubled, what is the rate at which it radiates heat? a) 16 W b) 64 W c) 240 W d) 320 W 9. Which one of the following properties of a gas is NOT consistent with the kinetic theory of gasses? a) The average speed of the gas molecules is smaller at higher. b) Gas molecules are widely separated. temperatures c) Gases fill whatever space is available to them. d) Gas molecules move rapidly in a random fashion 10. How much heat is radiated per second by a person of body temperature 100 °C. body area 2.8 m², and emissivity 0.25? a) 1000 J/s b) 255J/s c) 556 J/s d) 768 J's
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