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It's a pyramid.

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Q: Biggest buildings in ancient Egypt triangle sides and square bottoms?
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Are flip flops dangerous?

Scientists have found that modern footwear manufactures have incorporated comport in their designs making flip flops more popular, but people are more likely to trip wearing flip flops than shoes with support. Flip Flops cause stubbed toes and ankle and insole sores. They are also not good for your feet, especially if you are wearing flip flops with thin, worn out bottoms or hard soles.


What is a herculite door?

A herculite door was a particular manufacturer of a frameless glass door. This would normally consist of 1/2" tempered glass with the vertical edges polished. Tops and bottoms are pivoted by either patch fittings or full width shoes, often with polished metal cladding. These are hi profile doors you might see at a lobby, or mall entrance, or perhaps an executive office. People often recognize frameless glass doors as the age old term herculite door.


What is the difference between Levis red tag and Levis orange tag?

In the 1970s, there was a rumor that red tags were cut fuller for people with larger hips and rears, and orange tags were a slimmer cut. When I tried my first pair of straight-leg Levis (vs the bell bottoms which had been in vogue for years), I hated them because they seemed baggy and ill-fitting. My mother had bought me red tags, and when my sister suggested I try a pair of orange tags they fit much better and I loved them. I don't know whether this was a psychological trick or not, but it sold me on the notion that the red tags and the orange tags were designed differently.


Why molar flow for distillate and bottom in distillation must be same?

I would not say that the molar flow of those two streams need to be the same but rather their sum should equal the input into the distillation column. Moles of A in = Moles of A Distillate + Moles of A Bottom If you think about it, it makes very little sense that both streams should be equal because that would indicate you are doing a very poor separation! You ideally want to concentrate one product in either stream as best you can, while the other products get separated somewhere else in the column. If A is very volatile relative to other inputs, one would expect that Moles of A Distillate >> Moles of A Bottoms Normally you should avoid molar balances as moles are not usually conserved in many processes; however, distillation is simply a separation, so therefore a molar balance is safe to use but verify your assumptions!


What does a oil field pumper do?

Operate engines and pumps in order to shut off wells according to production schedules, and to switch flow of oil into storage tanks.Monitor control panels during pumping operations in order to ensure that materials are being pumped at the correct pressure, density, rate, and concentration.Perform routine maintenance on vehicles and equipment.Repair gas and oil meters and gauges.Unload and assemble pipes and pumping equipment, using hand tools.Attach pumps and hoses to wellheads.Open valves to return compressed gas to bottoms of specified wells in order to repressurize them and force oil to surface.Supervise oil pumpers and other workers engaged in producing oil from wells.Start compressor engines, and divert oil from storage tanks into compressor units and auxiliary equipment in order to recover natural gas from oil.Prepare trucks and equipment necessary for the type of pumping service required.Drive trucks in order to transport high-pressure pumping equipment, and chemicals, fluids, or gases to be pumped into wells.Mix acids, chemicals, or dry cement as required for a specific job.Control pumping and blending equipment to acidize, cement, or fracture gas or oil wells and permeable rock formations.