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March 30, 2015

Posted by **andrea** on Thursday, January 20, 2011 at 12:31am.

1. What is his average speed in mi/h?

2. What is his average speed in ft/s?

3. What is his average speed in m/s?

- physics -
**helper**, Thursday, January 20, 2011 at 1:21am1.00 mi in 4.00 min

1 mile/min = 60 mph

1 mile/4 min = 0.25 mi/min

1. 0.25 x 60 mi/hr = ? mph

2. 0.25 x 88 ft/sec = ? ft/sec

3. 0.25 x 26.8224 meters/sec = ? meters/sec

- physics -
**helper**, Thursday, January 20, 2011 at 1:49amshould have added above,

1 mi = 5280 feet

1 mi = 1609.344 meters

1 mi/min = 60 mi/hr

1 mi/min = 88 ft/sec

1 mi/min = 26.8224 meters/sec

sorry for the confusion. I wish there was a 'do over' button. :)

- physics -
**robert williams**, Monday, January 16, 2012 at 3:09pmOn March 27, 2004, the United States successfully tested the hypersonic X-43A scramjet, which flew at Mach 7 (seven times the speed of sound) for 11.0 seconds.

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