A scientist wants to determine how many gallons of milk the children at her son's elementary school drink per week. She sends out a survey (with approval by the school) and takes data on how many gallons of milk each student says they drink. What are the independent and dependent variables?

How does the motion of particles in a gas change as the gas cools

In science class richard learns that a substance has a boiling point of 230 fahrenheit his teacher ask him to convert this temperature to degrees celsius what is the boiling point of his substance in degrees celsius

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?