hi my dear friend,
two solid objects moving against each other experience kinetic friction. friction also acts in stationary objects. static friction prevents objects from moving and is generally higher than the frictional force experienced by the same two objects when they are moving relative to each other.
the answer is definitely c.
the formula for converting between temperature scales is often one of the formulas printed on the inside of one of the covers of your physics text book. (why do i get the creepy feeling that i need to explain what a 'book' is now ? )
anyway, be that as it may, and it probably is, the formula to take a fahrenheit temperature and convert it to a celsius one is
°c = (5/9) x (°f - 32°)
°c = (5/9) x (125° - 32°)
°c = (5/9) x (93°)
°c = (51 and 2/3)°
not too sure on this one maybe to locate objects under water, to diagnose problems, to treat medical ailments