Achemist has one solution that is 80% acid and another solution that is 30% acid. how much of the second (30%) solution is needed to make a 400 l solution that is 62% acid?

a police officer and a ambulance

the pseudoscience are like beliefs, theories, or like practices that are considered scientific

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.