Research methods is a broad term. While methods of data collection and data analysis represent the core of research methods, you have to address a range of additional elements within the scope of your research.
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In a disc-braking system the car's wheels are attached to metal discs, or rotors, that spin along with the wheels. The job of the caliper is to slow the car's wheels by creating friction with the rotors. The brake caliper fits over the rotor like a clamp. Inside each caliper is. a pair of metal plates bonded with friction material -- these are called brake pads.