Assume the mostly infrared radiation from a heat lamp is IR-B and acts like a continuous wave with wavelength 2.90 μm. (a) If the lamp's 220 W output focused on a person's shoulder, over a circular area 24.0 cm in diameter, calculate the intensity in (W/m²). W/m² (b) The shoulder area has a mass of 3.75 kg. Assume no other heat transfer and given its specific heat is 3.47 × 10³ J/(kg .°C), calculate the change in temperature if the shoulder is radiated for a time of 45.0 s. °C
Assume the mostly infrared radiation from a heat lamp is IR-B and acts like a continuous wave with wavelength 2.90 μm. (a) If the lamp's 220 W output focused on a person's shoulder, over a circular area 24.0 cm in diameter, calculate the intensity in (W/m²). W/m² (b) The shoulder area has a mass of 3.75 kg. Assume no other heat transfer and given its specific heat is 3.47 × 10³ J/(kg .°C), calculate the change in temperature if the shoulder is radiated for a time of 45.0 s. °C
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Transcribed Image Text:Assume the mostly infrared radiation from a heat lamp is IR-B and acts like a continuous wave with wavelength 2.90 μm.
(a) If the lamp's 220 W output is focused on a person's shoulder, over a circular area 24.0 cm in diameter, calculate the intensity in
(W/m²).
W/m²
(b) The shoulder area has a mass of 3.75 kg. Assume no other heat transfer and given its specific heat is 3.47 × 10³ J/(kg •°C), calculate
the change in temperature if the shoulder is radiated for a time of 45.0 s.
°C
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