## Sunday, November 4, 2012

### Textbook: page 61. Question 15

15. In dry air, the temperature decreases by about 0.65°C for each 100 metre increase in altitude.

a) The temperature in Red Deer, Alberta, is 10°C on a dry day. What is the temperature outside an aircraft 2.8 km above the city?

The number became 2800 because I converted 2.8 km to metres, so it became 2800. I multiplied it by .65 because the answer determines what to add or subtract it to the current temperature. I divided 1820 to 100 because it would easier to subtract the number to the temperature. I put 10 first because you are subtracting from 10. The temperature outside of the aircraft is -8.20°C.

b) The temperature outside an aircraft 1600 metres above Red Deer is -8.5°C. Whats is the temperature in the city.
I multiplied it by .65 because the answer determines what to add or subtract from the temperature. I divided 1040 by 100 because it would be easier to subtract the number to the temperature. The  temperature in Red Deer is -1.9°C.