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C/(A+B-C) (where C is the number of taxa in common between two samples and A and B are the numbers of unique taxa found in each of the two samples).

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10y ago

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How fast does a 35 horse power Johnson go?

Impossible to answer this question without knowing the coefficient of drag of the boat it is attached to.


How fast is a cow?

Don't know but i feel sorry for the cow that you use to test the experiment on. Well.... V = sqrt(2mg/pACd) where v = velocity in m/s m is the mass g is the acceleration of gravity p is the density (usually Rho in aerodynamic calculations) A is the area Cd is the drag coefficient just for the sake of argument we'll say that our cow weighs in at 800kg and we'll guess at it's projected area at 3.25 square meters. To keep things simple (since a cow isn't very aerodynamic) we will say the cow's drag coefficient is 1. after plugging in the values, you have a terminal velocity of about 63 meters/second ( a typical value for a human is approx 56 m/s).


What do animals use friction for?

Friction is a very helpful thing and with out it you couldn't move, speed up, slow down, change direction, bend, or twist. Without friction nothing would ever happen. Friction can oppose motion or it can make it difficult for an object to move across a surface. Friction both helps an hinders every thing we do.the object would not move without frictionThe friction acts in the opposite direction to that of direction of motion.So friction slows the object and if no external force is applied the object will come to stop.Friction is a force that opposes the direction of motion between two materials. It is parallel to the surface your object is touching. Friction depends on the coefficient of friction and the normal force (force exerted perpendicular to the surface your object is on; opposes gravity on a flat surface). There are two kinds of friction: static and kinetic. Static friction must be overcome in order to move an object. Once the object is in motion the friction acting on it is called kinetic. Static friction has a threshold of force that is needed to get the object moving but once the object is in motion it can be moved at a constant velocity with less force required.