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Question 5 How much is the power heat dissipation from a metal plate of area 4 m² heated to a temperature of 485°C in a room at 23°C. The plate's emissivity is 0.5 and Boltzmann constant is 5.67 X10-8 mks.

Question 5 How much is the power heat dissipation from a metal plate of area 4 m² heated to a temperature of 485°C in a room at 23°C. The plate's emissivity is 0.5 and Boltzmann constant is 5.67 X10-8 mks.

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D Question 4 A spring hangs down from a ceiling a distance of 7 cm. When a mass of 163 is attached, the spring length changes to 13 cm. Now if a person changes the length to 10 and then releases the mass, what is the angular frequency? Question 5 How much is the power heat dissipation from a metal plate of area 4 m² heated to a temperature of 485°C in a room at 23°C. The plate's emissivity is 0.5 and Boltzmann constant is 5.67 X10-8 mks. Question 6 You stand by the railroad tracks as a train passes by. You hear a 966 Hz frequency when the train approaches, which changes to 743 as it goes away. How fast in f/s is the train moving? (V-sound = 1100 f/s)
Transcribed Image Text:D Question 4 A spring hangs down from a ceiling a distance of 7 cm. When a mass of 163 is attached, the spring length changes to 13 cm. Now if a person changes the length to 10 and then releases the mass, what is the angular frequency? Question 5 How much is the power heat dissipation from a metal plate of area 4 m² heated to a temperature of 485°C in a room at 23°C. The plate's emissivity is 0.5 and Boltzmann constant is 5.67 X10-8 mks. Question 6 You stand by the railroad tracks as a train passes by. You hear a 966 Hz frequency when the train approaches, which changes to 743 as it goes away. How fast in f/s is the train moving? (V-sound = 1100 f/s)
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