Chapter 11, Problem 9E

Interpretation Introduction

Interpretation:

The function of hot air balloon is to be explained, and the relation between windy coastal weather and Charle’s Law is to be described.

Concept Introduction:

According to Archimedes principle, any object suspended in a fluid, is acted upon by an upward buoyant force which is equal to the weight of the fluid that has been displaced by the object. A hot air balloon with a vacuum inside is lifted by buoyant force because it weighs less than air.

The rising of air due to heat is called convection; the earth is heated unevenly. According to Charles law that part of the air which heats up faster will expand faster, along with a drop in pressure. As the air above the sea is cooler (high pressure), air flows from a high pressure region to the low pressure region.