When the datas are all gathered, the platters might stop spinning depending on your system preferences setting. Reason to this is, it can save battery life. Once the platters stop the computer can not be used. Using the computer again, it will need to let the waiting point to interact the head again so the HDD can send out data to the RAM. This process will be slow, which is why computers are always so slow after have turning it on.
RAM is the abbreviation for Random-access memory. When taking the computer apart, notice it is somewhere on the motherboard, it is some green chips which should be clipped into a slots. Depending on your computer or laptop it should have 2 to 4 RAMs, these RAMs can usually hold about 2-6 Gigabytes. The function of the RAM is literally the opposite of the Serial Accessing Memory(SAM), SAM scans for the data in sequence through every memory cell until it get the information it wants. The reason it is called the 'Random Access' Memory, is because the computer is able to retrieve the data inside the RAM randomly and at any time. The Motherboard is what links all internal components of the computer together, so each of them are able to interact with each other and perform its job adequately. The Motherboard would be useless on its own, but as all the elements of the computer are secured onto the Motherboard it is an very monumental piece of equipment. As the CPU informs all the parts of the computer to process. The Motherboard evaluates the timing of all the devices in the computer with its clock, which would be also synchronised with the CPU clock. The Motherboard dominates the timing of the whole hardware and judges the pace of the performances whether it should be high-speed, moderate or slow. The Motherboard is able to manage the speed of the elements due to a setting in the firmware.
The Power Supply will usually be located on the corner of the computer so it is able to have the plug outside.
