404. That’s an error.

The requested URL /translate_c?hl=el&langpair=en%7Cel&rurl=translate.google.gr&u=http://phet.colorado.edu/sims/density-and-buoyancy/density_en.html&usg=ALkJrhiK-hMNWbZbok-t-hdYiVd7kFsEpA was not found on this server. That’s all we know.