Why does the trachea not collapse but oesophagues collapses when fod is not swallowed?

The graph below shows the sources of some of the primary air pollutants generated by human activities.

How can radar be used for forecast weather?

What is one way of describing elements? A:They are the building blocks of matter. B:They are the most expensive materials on earth. C:They break down easily D:They are the smallest particles of any material.

Which element is most likely to allow electricity to pass through it

15 g of water were heated from 5 c to 25 C. if the specific heat of water is 4.2, about how much energy was added to the water

Term that describes the hypogastric region of the abdomen with respect to the illiac region

A geologist found a sediment deposit at the open end of a valley. After studying the deposit, the geologist concludes the sediment was deposited by the front end of a glacier. There is a glacier in the valley, but it has melted back 2.

The membrane in the ear is named for what musical instrument

The earths core is made up mainly of what 2 substances? 2. Like an egg, Earth has a core, a layer surrounding the core, and a thin, hard outer layer. Which layers of the earth match the layers of an egg?

Pyruvic acid is the final product of glycolysis, which is the first stage of cellular respiration. Why is pyruvic acid never the end product of fermentation.