The result will usually be that the vinegar cleans the pennies better, demonstrating that a lower-pH solution is better at cleaning discoloration due to oxidation. The volume of liquid and the material of the penny are both controlled variables in this experiment. This experiment is especially good for teaching the concept of a controlled variable if you include a third variable -- how dirty the pennies are.
1 doctor agreed: Yes: Pinworm symptoms can include gastrointestinal upset, anal or vaginal itchiness, loss of appetite, difficulty sleeping, irritability, restlessness. Untreated pinworm infection can lead to weight loss, diarrhea, genital rash, urinary incontinence and vaginal discharge.
What these 4 conditions have in common is an inflammation of the digestive tract. This causes a number of different symptoms and diarrhea is a common one. These symptoms, including diarrhea, are often triggered by eating specific types of food. For example, people with celiac disease can often experience diarrhea if they eat foods containing gluten. Foods containing milk or yeast can also trigger bouts of diarrhea.