Vestigial Structures: Evolution`s Fallacies Jake Drahos Many people
... not particularly beneficial, then there is no reason for it to disappear as a result of evolution. What does ...
... not particularly beneficial, then there is no reason for it to disappear as a result of evolution. What does ...
MECHANICAL PRINCIPLES OUTCOME 4
... effort (FE). The ratio is called the Mechanical Advantage or Force Ratio. M.A. = FL/FE The distance moved by the load is XL and the distance moved by the effort is XE. The ratio of the two is called the Velocity Ratio or Movement Ratio. V.R. = XE / XL If we plot a graph of Effort against Load for an ...
... effort (FE). The ratio is called the Mechanical Advantage or Force Ratio. M.A. = FL/FE The distance moved by the load is XL and the distance moved by the effort is XE. The ratio of the two is called the Velocity Ratio or Movement Ratio. V.R. = XE / XL If we plot a graph of Effort against Load for an ...
Angular momentum
... live on the rim and the ship rotates such that they feel a ‘gravitational’ force of g. If the crew moves to the center of the ship and only the captain would stay behind, what ‘gravity’ would he feel? ...
... live on the rim and the ship rotates such that they feel a ‘gravitational’ force of g. If the crew moves to the center of the ship and only the captain would stay behind, what ‘gravity’ would he feel? ...
40 N m
... When using conservation of energy, both rotational and translational kinetic energy must be taken into account. All these objects have the same potential energy at the top, but the time it takes them to get down the incline depends on how much rotational inertia they have. ...
... When using conservation of energy, both rotational and translational kinetic energy must be taken into account. All these objects have the same potential energy at the top, but the time it takes them to get down the incline depends on how much rotational inertia they have. ...
Biology booklet 2
... Study the diagram above. Discuss what this tells you about the evolutionary process. What conclusions can you come to about all of these finches? Scientists often use the term “adaptive radiation” when talking about the evolution of new species. What do you think this term means? Research this phras ...
... Study the diagram above. Discuss what this tells you about the evolutionary process. What conclusions can you come to about all of these finches? Scientists often use the term “adaptive radiation” when talking about the evolution of new species. What do you think this term means? Research this phras ...
Rotating locomotion in living systems
There exist two distinct modes of locomotion using rotation: first, simple rolling; and second, the spinning of parts relative to a fixed axle or body, in the manner of a wheel or propeller. Several organisms move by rolling; however, despite the ubiquity of wheels in human vehicles, true wheels do not appear (with the exception of certain flagella) to play any role in the movement of organisms. Biologists have expounded on the reasons for this apparent lack of biological wheels, and wheeled creatures have often appeared in speculative fiction.Given the utility of the wheel in human technology, and the existence of biological analogues of many other technologies (such as wings and lenses), it might seem odd that wheels do not appear in nature, but there are two main factors which explain this phenomenon. First, there are several developmental and evolutionary obstacles to the advent of a wheel by natural selection (addressing the question ""Why can't wheels evolve?""). Secondly, wheels are often at a competitive disadvantage when compared with other means of propulsion (such as walking, running, or slithering) in natural environments (addressing the question ""If wheels could evolve, why would they be unlikely to do so?""). Incidentally, this disadvantage in some environments also explains why some civilizations have abandoned wheels.