$32,000 for Married Filing Jointly. $0 for Married Filing Separately if the spouses lived together during the year. If your total income is more than the base amount, you might owe some tax on your Social Security benefits.
Pure water at 60F has about 27.78 inches of water column (INWC or INWG) per psi or approximately 0.43197 psi/ft. This is from memory; but it should be close. Fresh water: 0.43 psi per foot Sea water: 0.44 psi per foot. So, for each additional 10 feet of depth, figure about 4.3 to 4.4 psi increase in pressure. You can calculate this yourself by using the fact that fresh water weighs about 62.4 pounds per cubic foot (pcf) and sea water weighs about 64 pcf.
Illuminance is measured in foot candles (ftcd, fc, fcd) or lux (in the metric SI system). A foot candle is actually one lumen of light density per square foot; one lux is one lumen per square meter. â¢ 1 lux = 1 lumen / sq meter = 0.0001 phot = 0.0929 foot candle (ftcd, fcd) â¢ 1 phot = 1 lumen / sq centimeter = 10000 lumens / sq meter = 10000 lux â¢ 1 foot candle (ftcd, fcd) = 1 lumen / sq ft = 10.752 lux Common Light Levels Outdoors from Natural Sources Common light levels outdoor at day and night can be found in the table below: Illumination Common Light Levels Outdoors from Manufactured Sources The nomenclature for most of the types of areas listed in the table below can be found in the City of