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Download as PDF; Printable version; ... Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars. ... Helium: 0.0001785: 0.008 (2. ...
Download as PDF; Printable version; In other projects ... 535 kg/m 3: LNG (at 20 °C) ... "The Observed Properties of Liquid Helium at the Saturated Vapor Pressure".
Of course, cost per kg is not the only important factor in material selection. An important concept is 'cost per unit of function'. For example, if the key design objective was the stiffness of a plate of the material, as described in the introductory paragraph above, then the designer would need a material with the optimal combination of ...
Liquid helium is a physical state of helium at very low temperatures at standard atmospheric pressures.Liquid helium may show superfluidity.. At standard pressure, the chemical element helium exists in a liquid form only at the extremely low temperature of −269 °C (−452.20 °F; 4.15 K).
Download as PDF; Printable version ... the consumption of helium within the U.S. had risen to more than 15 million kg per year ... From 2002 to 2007 helium prices ...
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1 m 3 × 1.202 kg/m 3 × 9.8 N/kg= 11.8 N. Therefore, the amount of mass that can be lifted by helium in air at sea level is: (1.292 - 0.178) kg/m 3 = 1.114 kg/m 3. and the buoyant force for one m 3 of helium in air at sea level is: 1 m 3 × 1.114 kg/m 3 × 9.8 N/kg= 10.9 N. Thus hydrogen's additional buoyancy compared to helium is:
To ensure that the revenue from future sales would amortize the cost, the Secretary of the Interior raised the price of high purity helium from $12 per thousand cubic feet to $35. [ 1 ] [ 4 ] This price jump was an incentive for private companies to enter the market and sell helium at lower prices.