9) an experiment has been performed to determine the porosity of an unconsolidated sandpack. distilled water was poured into a graduated cylinder to a height h . fine sand of average grain size of 150 um was poured into the graduated cylinder to a height hy to form the sandpack. it was found that the water in the graduated cylinder rose to a height h2 after the sand was poured into the cylinder. a. derive the expression for the porosity of the sandpack in terms of h, and h2. b. given hı = 5 cm and h2 = 8 cm, calculate the numerical value of the porosity of the sandpack. c. what is your best estimate of the permeability of the sandpack? give a numerical answer and briefly outline how you made the estimate.

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Answerglycogen;

The answer to the first one is barometer.

The latin america and caribbean (lac) region encompasses countries with great environmental issues. the southern portion of central america to the caribbean's part, including south america presses the major environmental issues like deforestation and   habitat subsistence. the requirement of the whole country and the pressure of export is being done by this region as it possess the soil with highest fertility rate and maximum strength which could us in modifying the various technology for the humankind. because of deforestation, we take animal shelters away from them, so the major issue occurs again which we known as "habitat subsistence". government has to set the target according to the capacity of a certain region which would not affect the environment. then, businesses and organizations have to understand their roles and need to divide the task into several groups (one for each, according to their natural capacity), individuals can the government or statuary body by just following their guidelines and never harm or exploit the environment for our own use.i really hope this you out!