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## Greater Crater

As Joe Webb would have said, these are the facts....

• About 50,000 years ago, a meteorite landed in the Arizona desert approximately 43 miles east of Flagstaff
• The nickle-iron meteorite struck the desert plain at a speed of about 28,600 mph, with an impact energy of about 10 megatons.
• The meteorite itself basically vaporized upon impact, leaving the crater behind.
• Now called the Meteor Crater or Barringer Crater, the crater formed is 570 feet deep and 4000 feet in diameter.
• The average meteorite that hits the earth is the size of a grain of sand and weighs about 0.0005 ounces
Question 1: How many "average meteors" are needed to weigh a pound...and if packed in a spherical shape, what is the diameter?
Question 2: Extrapolating, what was the expected weight (or mass) of the Meteor Crater or Barringer Crater (assuming it is equivalent to a hemisphere)?
Question 3: Assuming you started at the rim and walked at your normal walking pace down the side of the crater, through its lowest center point, and then directly up to the opposite rim, how long would this take?