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標題:
物理計算題
發問:
On a very cold day when the temperature is 2 degrees,Mary stands on the street and waits for her friend.Suppose she takes in air of 6.5*10的負四次方 kg into her lungs during each breath.(a)what is the amount of energy required for her to warm the air to 37 degrees in each breath? given that the specific heat capacity... 顯示更多 On a very cold day when the temperature is 2 degrees,Mary stands on the street and waits for her friend.Suppose she takes in air of 6.5*10的負四次方 kg into her lungs during each breath. (a)what is the amount of energy required for her to warm the air to 37 degrees in each breath? given that the specific heat capacity of air is 1020j/kg/degrees (b)how much energy is lost in one hour if her breathing rate is 15 breaths per minute?
On a very cold day when the temperature is 2 degrees,Mary stands on the street and waits for her friend.Suppose she takes in air of 6.5x10-4 kg into her lungs during each breath. (a)what is the amount of energy required for her to warm the air to 37 degrees in each breath? given that the specific heat capacity of air is 1020J kg-1degrees-1 每吹一口氣，空氣獲得的能量為 E = mcΔT E = 6.5x10-4 x 1020 x (37-2) E = 23.205J (b)how much energy is lost in one hour if her breathing rate is 15 breaths per minute? 在一時她共呼吸了 60 x 15 = 900次 所以共失去能量 900 x 23.205 = 20884.5J
其他解答:
物理計算題
發問:
On a very cold day when the temperature is 2 degrees,Mary stands on the street and waits for her friend.Suppose she takes in air of 6.5*10的負四次方 kg into her lungs during each breath.(a)what is the amount of energy required for her to warm the air to 37 degrees in each breath? given that the specific heat capacity... 顯示更多 On a very cold day when the temperature is 2 degrees,Mary stands on the street and waits for her friend.Suppose she takes in air of 6.5*10的負四次方 kg into her lungs during each breath. (a)what is the amount of energy required for her to warm the air to 37 degrees in each breath? given that the specific heat capacity of air is 1020j/kg/degrees (b)how much energy is lost in one hour if her breathing rate is 15 breaths per minute?
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最佳解答:On a very cold day when the temperature is 2 degrees,Mary stands on the street and waits for her friend.Suppose she takes in air of 6.5x10-4 kg into her lungs during each breath. (a)what is the amount of energy required for her to warm the air to 37 degrees in each breath? given that the specific heat capacity of air is 1020J kg-1degrees-1 每吹一口氣，空氣獲得的能量為 E = mcΔT E = 6.5x10-4 x 1020 x (37-2) E = 23.205J (b)how much energy is lost in one hour if her breathing rate is 15 breaths per minute? 在一時她共呼吸了 60 x 15 = 900次 所以共失去能量 900 x 23.205 = 20884.5J
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