Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5 s. the maximum rate of air flow into the lungs is about 0.4 l/s. this explains, in part, why the function f(t) = 2 5 sin(2πt/5) has often been used to model the rate of air flow into the lungs. use this model to find the volume of inhaled air in the lungs at time t.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.

answer; motor (efferent)neurons;