A36-in-diameter pipeline carries oil (sg = 0.89) at 1 million barrels per day (bbl/day). the friction head loss is 13 ft/1000 ft of pipe. it is planned to place pumping stations every 10 mi along the pipe. estimate the horsepower which must be delivered to the oil by each pump.

144540.16735 hp

Explanation:

Diameter of pipe = 36 in

Specific gravity of oil = 0.89

ρ = Density of oil = 0.89×62.2407

Q = Flow rate of oil = 1×10⁶ bbl/day = 1×10⁶×5.61458/86400 =  64.9836033565 ft³/s

hf = 13 ft/1000ft = 0.013 ft/ft

for 10 miles

hf = 0.013×10×5280 = 686.4 ft

g = Acceleration due to gravity = 32.17405 ft/s²

Power

P = ρQghf

⇒P = 0.89×62.2407×64.9836033565×32.17405×686.4

⇒P = 79497097.342 ft lbf/s

1 ft lbf/s = 0.0018181817 hp

79497097.342 ft lbf/s = 144540.16735 hp

∴ Horsepower which must be delivered to the oil by each pump is  144540.16735 hp

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

the tires are rotating at 0.434 rpmlinear speed=45 m/sdiameter=0.550 mradius=0.275 mnow v= rωω= v/rω=45/0.275ω=163.6 rad/sω=163.6 rad/s (1rev/2π rad) (60s/1m)ω=1563 rpm