there are 11 metamorphic rocks. But i cant figure out what they are
Amphibolit, Blueschist, Eclogite, Gneiss, Granulite, Migmatite, Phyllite, Quartzite, Schist, Serpentinite, Slate, Soapstone, Marbe (Limestone/Dolomite), Greenschist, Greenstone, Hornfels.
I can assure you the front brake pads have been replaced a minimum of two times. The rear shoes always wear slower than the front pads because of the front brake bias toward the front of the vehicle. On any car especially front wheel drive cars front pads wear 2-3 times faster than rear shoes. Now, things change with rear disc brakes. The pads and rotors are much smaller than the front and they wear at almost the same rate as the front pads and rotors.
front pads do the most stopping and will need replacing like every other yr 10 to 20,000 miles the back brakes are for like hard stopping and parking and only need replacing every other time you have the fronts done in most cases. and the right side will wear out before the left. cause of the high center of the road ways and after you drive it til the brake light comes on then it needs to be reset . not hard to check brakes for wear. jack it up and remove front wheel look at the pad it should be thicker than the medal its glued to if its not then its bad remember the last time you done the front brakes and the next time to the rears also
It may be whats call a proportioning valve somewhere in your break system. You need a book. However you also may have aquired a bit of air in the front brake lines (air compresses fluid dose not). Bleed your brake system , starting with the farthest wheel from the brake master cylinder, working your way around to the closest. This is assuming you have always changed both the front and rear pads . And not just the front . like is commonly done. And assuming you have 4 wheel disc brakes