Longitudinal waves are compressional waves which means they travel in one direction and do not radiate out.
They are created by continuous intermittent compression and thus will have sparse spacing and then compressed and then sparse, compressed and so on.
Such wave requires a medium such as solid liquid or air to travel thru.
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When it shifts inwards, it indicates that the economy is shrinking due to a failure in its allocation of resources and optimal production capability. A shrinking economy could be a result of a decrease in supplies or a deficiency in technology.
Answer:
Theories and laws
Explanation:
A scientific theory is important because it is an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results. Theories can be proven or rejected, just like hypotheses. Theories can be improved or modified as more information is gathered so that the accuracy of the prediction becomes greater over time.
A scientific law is important because it is a description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is a scientific theory.
Scientific laws do not have absolute certainty (as theorems do), and it is always possible for a law to be contradicted, restricted, or extended by future observations.
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When water<span> molecules </span>move <span>freely </span>across the cell membrane<span>, the </span>process<span> is </span>called osmosis<span>, which is just a special type of simple diffusion.</span>