Activity 3: Philippine Coins and their Densities

Activity 3 was still about measurement. Here, we were asked to measure the 5 centavo coin, 10 centavo coin, 25 peso coin, 1 peso coin and 5 peso coin, and find their densities. We measured the diameter and thickness of the coin using a vernier caliper, and each coin's mass using a weighing scale.

Measurement of the coins:

With these measurements, we are able calculate the volumes (v) of the coins. Since v = pi*r^2*t and r = d/2, v = (pi*d^2*t)/4. As for the 5 centavo coin which has hole,  its volume can be found by calculating the volume of the coin disregarding the hole, and subtract it by the volume of the hole of the coin.

The next step is to find the density. Density is equal to mass over volume.
Hence: