What do you think accounts for the diffidence between the starting friction and the sliding friction

Once inertia is overcome and the object is in constant motion then sliding friction will mostly depend on the surface, environmental factors (wind, ice, etc...).  

example:  

To push a piano from 0 to 1m/minute you would need to over come a huge force pulling down the piano(gravity) but if it were already moving...to push it , it would require less force, if the environment (and the surface) was smooth and not uphill.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.