12/12/2013
In the Archdiocese of Boston, on any given weekend, about 250,000 people attend Mass. Let's assume that 80 percent of them carry cell phones -- that's 200,000. A Pew Research Center study in May of 2013 determined that 40 percent of cell phone users use those phones to access social media sites, like Facebook. So, each weekend, some 80,000 people attending Mass in the Archdiocese are able to post on Facebook from their cell phones. Now, how many "friends" a Facebook user has is strongly dependent on their age. I'm 50, and in my age group the average number of friends is 183. For someone age 18-24, the average number is 510. Let's use 200 as our overall average, which is conservative. If all of the 80,000 people who both go to Mass and can access Facebook from their cell phones were to "check in" when they get to Mass, what would happen? Sixteen million times, people would see "I'm at Mass at ..." Every weekend. That sort of simple action can begin to change the prevailing concept that "no one goes to Mass anymore." And, the change would be most strongly felt among the very population that we need most strongly to evangelize. And ... perhaps most importantly of all, the person who has made the post now begins to adopt the identity of an evangelizer. http://ow.ly/rIwfU
The change in velocity (delta-v) of a rocket is equal to the exhaust velocity of the propellant times the natural logarithm of the total initial...
