ARE THESE MORGAN SILVER DOLLARS REAL OR FAKE?

if these weighed something like 19 G or if they weighed over instantly I would know that they're bad just by weighing it and just by doing the magnet test you can't tell so both pile of coins if I put them on top of each other they're the exact same diameter this pile is a little bit thicker than this pile yet they weigh the same and they have the same exact diameter these basically you have to have more mass in this pile than in this pile to equal the same weight because if I put them on top of each other if you look straight down this way you'll see that they're the exact same diameter so that's the first part of this that kind of looks a little funky so next we're going to check the sound that these coins make so first I want to go to this app called coin tester let's select the coin the first one here Morgan okay so let's check this out I'm going to hit it with my pen and see if the app recognizes that sound put this next to the microphone