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1. |
A_black_body_radiates_energy_at_the_rate_of_1×105_J/(sm)2_at_a_temperature_of_227°C._The_temperature_to_which_it_must_be_heated_so_that_it_radiates_energy_at_the_rate_of_1×109_J/(sm)2$ |
A. | 5000 K |
B. | 5000°C |
C. | 500 K |
D. | 500°C |
Answer» B. 5000¬¨¬®‚Äö√†√ªC | |