Water (density = 62.4 lb/ft3, viscosity 1 cp) is pumped from a large reservoir on the floor at a rate of 80 gpm to the top of a small tower. the discharge point is 20 ft above the centerline of the pump. frictional and other (contraction, expansion, etc.) loses in suction and discharge lines amount to 1.5 ft head of liquid. if the pump develops only hp and the inside diameter of the pipe is 2 inches, the water height [ft] in the reservoir must be closest to: (c) 10.18 (d) 12.17 (c) 8.65 (d) 3.11 ie

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but