Question

1. how many drops of each substance did you fit on the head of a penny?

Explanation:

This question is about an experiment (likely related to surface tension, a concept in Physics, a subfield of Natural Science) to determine the number of drops of substances on a penny. Since it's asking for a result from an experiment (which would vary based on actual testing), here's how to approach it if you conducted the experiment:

Step1: Prepare Materials

Gather a penny, droppers, and substances (e.g., water, soap solution).

Step2: Conduct Experiment

For each substance, carefully drop it onto the penny's head, counting until it overflows. Repeat for accuracy.

Step3: Record Results

Note the number of drops for each substance (e.g., water: ~20 - 30 drops, soap: ~10 - 15 drops, depending on conditions).

Answer:

The number of drops varies by substance (e.g., water: ~20–30, soap: ~10–15) and experimental conditions. Record your own results from the experiment.