Question

A hot air ballon is rising to its cruising altitude. Suppose the air temperature around the ballon drops 4 degrees each time the ballon increases its altitude by 1,000 feet. What is the net change in the air temperature around the ballon as it rises from 6,000 feet to 14,000 feet

Answer 1

There are 8 1,000 altitude increases. So 8 times 4 is 32 degrees. The net change is -32 degrees.

Answer 2

Using the rate of change principle, the net change in the air temperature as it rises from 6000 to 14000 feets would be :-32°

Change in air temperature = - 4° per 1000 feets ;

Total change in altitude :

• 14000 - 6000 = 8000 feets

Net change in air temperature can be calculated thus :

• (8000 ÷ 1000) × -4°

• 8 × - 4° = - 32°

Hence, the net change in temperature is - 32°

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