A25 n object requires a 5.0 n to start moving over a horizontal surface. what is the coefficient of static friction?

0,2 would be the coefficient of friction.

Explanation:

Remember that the force necessary to move an object over a horizontal surface is the weight of the object multiplied by the coeficient of friction, an the formula is this:

Where u is the coefficient of static friction and N is the normal force, or in this case the weight of the object so if we solve for U the formula would be like this:

Now we just insert the data we know:

So the coefficient of friction would be 0.2

layer a is the exosphere and layer b is the thermosphere.   is the answer i think but i hope this .

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.