Wednesday
October 1, 2014

Homework Help: Physics

Posted by y912f on Thursday, January 29, 2009 at 5:11pm.

1.what is the shortest possible time in which a bacterium could travel a distance of 8.4 cm across a Petri dish at a constant speed of 3.5 mm/s.

the answer is 24s. how?
3.An athlete swims from the north end to the south end of a 50.0m pool in 20.0s and makes the return trip to the starting position in 22.0s.
a. What is the average velocity for the first half of the swim?
the answer is 2.50m/s to South
b. What is the average velocity for the second half of the swim?
the answer is 2.27m/s to North
c. What is the average velocity for the roundtrip?
the anser is 0.0 m/s
i have the answers, i need to know how to GET to the answers..step by step please.

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