To meet a U. S. Postal Service requirement, employees' footwear must have a coefficient of static friction of 0.5 or more on a specified tile surface. A typical athletic shoe has a coefficient of 0.770. In an emergency, what is the minimum time interval in which a person starting from rest can move 3.50 m on a tile surface if she is wearing the following footwear?(a) footwear meeting the Postal Service minimum(b) a typical athletic shoe in s.

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.

Ur mom because that makes a lot of sense

Coxygen (chlorophyll) is the third step in a plant growing.chlorophyll is combine with water to form oxygen