Motion Mountain - The Free Physics Textbook for Download. Neurological Control - Neurotransmitters. Neurotransmitter Molecules Neurotransmitters can be broadly split into two groups – the ‘classical’, small molecule neurotransmitters and the relatively larger neuropeptide neurotransmitters.
Within the category of small molecule neurotransmitters, the biogenic amines (dopamine, noradrenaline, serotonin and histamine) are often referred to as a discrete group because of their similarity in terms of their chemical properties. Tutorials related to Kinematic Mechanisms. K-MODDL & Tutorials & Reuleaux Triangle.
If an enormously heavy object has to be moved from one spot to another, it may not be practical to move it on wheels.
Instead the object is placed on a flat platform that in turn rests on cylindrical rollers (Figure 1). As the platform is pushed forward, the rollers left behind are picked up and put down in front. An object moved this way over a flat horizontal surface does not bob up and down as it rolls along. The reason is that cylindrical rollers have a circular cross section, and a circle is closed curve "with constant width. " What does that mean?
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