Meditation Tips for Beginners. 1  Guided meditation MP3s or CDs as meditation tools. For beginners, audio guided meditations provide step-by-step instructions that help to introduce meditation in an easy and non-intimidating way. 2  Aim to have the length of your exhalations as long, if not longer, than your inhalations.
While air can be compressed more easily than water, freely flowing air acts much like waterâat least at relatively low speeds. So when you squeeze a stream of air, two things happen. The air speeds up, and as it speeds up, its pressureâthe force of the air pressing against the side of the objectâgoes down. When the air slows back down, its pressure goes back up. Why does the air speed up? Because of conservation of mass, which states that mass is neither created nor destroyed, no matter what physical changes may take place.
As altitude increases, the amount of air molecules decreases. Consequently, as altitude increases, air pressure decreases. The troposphere is the layer of the atmosphere closest to the surface of the Earth. Its altitude is less than that of the stratosphere.Therefor, the air molecules are closer together in the troposphere. The air in the troposphere is, then, more dense than that in the stratosphere. Hence, the air pressure in the troposphere is greater than that in the stratosphere.s altitude increases, the amount of air molecules decreases. Consequently, as altitude increases, air pressure decreases. The troposphere is the layer of the atmosphere closest to the surface of the Earth. Its altitude is less than that of the stratosphere.