Reviews the approach taken in problems such as this one. a bird watcher meanders through the woods, walking 0.916 km due east, 0.918 km due south, and 3.52 km in a direction 49.7 ° north of west. the time required for this trip is 1.750 h. determine the magnitudes of the bird watcher's (a) displacement and (b) average velocity.

Displacement: 2.230 km    Average velocity: 1.274

Explanation:

Let's represent displacement by the letter S and the displacement in direction 49.7° as A. Displaement is a vector, so we need to decompose all the bird's displacement into their X-Y compoments. Let's go one by one:

First of all. We need to sum all the X components and all the Y componets.

∑ ⇒  ∑

∑

∑ ⇒ ∑

∑

The total displacement is calculated using Pythagoeran therorem:

⇒

With displacement calculated, we can find the average speed as follows:

 ⇒  

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

gravity

explanation: