Brake rotors are rarely perfectly flat or centered. "runout" is the Word used to describe how far from perfect a rotor is.
This is normal. Average braking causes friction which causes heat but, excessive heat from one rotor could be caused by a sticky or stuck brake caliper.
A disc brake rotor with excessive run out is a warped rotor which causes a pulsation in the brake pedal when the brakes are applied. A certain amount of run out is acceptable.
Out of Alignment, Bad Brake Rotor Runout. Loose Motor Mounts... It really depends on when it vibrates.
Excessive wear, or lack of oil. Or both. Generally lack of oil is what causes the excessive wear.
Foreign material in the substance being pumped, excessive system pressure, wear over time, poor construction/build quality, improper substance being pumped.
Excessive revving of an engine causes overpressure in the crankcase. It causes unhealthy expansion in the pistons and the valves.
No
The foods you eat.
A glazed rotor is one that appears smooth and glazed over. There are usually two reasons for glazing. The first is using cheap brake pads. Another reason is an excessive amount of heat between the pad and rotor.
Most common cause is imperfection in rotor or rotor's. Rust or hot spots.
Excessive water intake and excessive caffeine will cause GI distress.