Homework Chapter 5 Essay Example | Topics and Well Written Essays - 250 words

Homework Chapter 5 - Essay ExampleExplain how diffuse pressure tendency can be a useful indicator of future weather. Answer Air pressure tendency can be a useful indicator of weather forecast as it is the change in air pressure over a specific time interval, such as several hours. Falling or rising of air pressure signals the approach of stormy or fair weather respectively. Aneroid barometers are usually equipped with second pointer that serves as reference soft touch for setting current variation. The user can observe the new pressure reading taken at a later time and compare it with reading earlier set on second pointer to determine air pressure tendency. The barograph then provides a continuous trace of air pressure variations with time, fashioning it easier to determine air pressure tendency and forecasting weather. Question 5. Air is a compressible mixture of gases. How does this property of air affect the rate at which air pressure decreases with increasing altitude? Answer Air is a compressible mixture of gases, so its volume and density are variable. The pull of gravitational attraction compresses the atmosphere so that the maximum air density is at the earths surface. So, the atmospheres gas molecules are closely spaced at the earths surface and the spacing between molecules increases with increasing altitude. Thus, the number of gas molecules per unit volume (air density) decreases with increasing altitude. Question 6.