#### • Class 11 Physics Demo

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Question:

Answers:that depends on the material's specific gravity weight in kg = specific gravity * volume in ltrs

Question:I need the answers to be in pounds

Answers:Get the weight of one cubic foot of water and multiply by 5. Forget Kg in the entire process. Don't need it. A cubic foot of water weighs approx. 62.42796 pounds

Question:

Answers:depends what the other 4% is but generally alcohol is almost the same as water, so if the other 4% is water, you can say that 1 liter of alcohol is approximately 1 kilogram

Question:

Answers:In this article density is around 500 to 600 Kg/m^3 I would say about 2Li per kg LPG (Liquefied Petroleum Gases) are hydrocarbon products in the C3-C4 range, propane (C3H8) and butane (C4H10) constituting the main components of them. These products, gaseous at normal temperature and pressure conditions, can be very easily liquefied under low pressure and therefore can be handled very simply. Boiling Point ( C) Liquid Density (kg/m3) at 15 C Gas Density (kg/m3) at 15 C Butane 0.5 570-580 1.9 -2.1 Propane -42 500-510 1.4 -1.55 - 1 litre of liquid butane liberates 239 litres of gas (15 C - 1bar) - 1 litre of liquid propane liberates 311 litres de gas (15 C - 1bar) These physical characteristics provide great advantage concerning storage and transport. LPG have a high heating capacity =12 000 kcal/kg Because of their high heating power, their high purity and cleanness of combustion and their easy handling, LPG find very wide application in a large variety of industrial, commercial, domestic and leisure uses. Propane will be more used where faster rates of flow are required in particuler for industrial uses. LPG is not toxic. Nevertheless, precautions should be taken in order to avoid the exposure of workers during 8 hours per day and 40 hours per week at a concentration of butane in air higher than 1200mg/m3. Since LPG are colorless and odorless, a stenching agent (Ethyl Mercaptan is currently used) is added to LPG in order to identify them in case of a leak. In order to prevent the formation of hydrates with water, in many countries in Europe, methanol is also added to LPG. LPG are extremely flammable substances and the flammability in air at 20 C under 1 atm ranges between 2% and 10%. As LPG are heavier than air, they remain in low areas an