Food waste, like a feather or a bone, fall into food, causing contamination.
Physical
Chemical
Pest
Cross-conta

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?