Assuming that the air temperature drops 6.5 Celsius degrees per 1000 m, compute the temperature at the tropopause if the sea-level air temperature is 15 °C and the altitude of the tropopause is 11 km. Answer: _____ °C (Round to the nearest tenth, do not include units.)

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To compute the temperature at the tropopause, we need to take into account the decrease in temperature with altitude. The given information states that the air temperature drops by 6.5 degrees Celsius per 1000 meters of altitude.

First, we need to determine the change in temperature from sea level to the tropopause by multiplying the rate of temperature decrease (6.5 Celsius degrees per 1000 m) by the altitude of the tropopause (11 km).

Change in temperature = (6.5 °C / 1000 m) * (11,000 m) = 71.5 °C

Next, we need to subtract this change in temperature from the sea-level temperature of 15°C to find the temperature at the tropopause.

Tropopause temperature = Sea-level temperature - Change in temperature
Tropopause temperature = 15 °C - 71.5 °C

Calculating this gives us: Tropopause temperature = -56.5 °C

Therefore, the temperature at the tropopause is approximately -56.5 °C (rounding to the nearest tenth and excluding units).