torque converter elements. a fluid coupling is a two element drive that is incapable of multiplying torque, while a torque converter has at least one extra element—the stator—which alters the drive's characteristics during periods of high slippage, producing an increase in output torque.
a run-flat tire is a pneumatic vehicle tire that is designed to resist the effects of deflation when punctured, and to enable the vehicle to continue to be driven at reduced speeds - under 56 mph 90 km/h - and for limited distances - generally between 10 mi 16 km to 50 mi 80 km , depending on the type of tire.
cytoplasmic streaming, also called protoplasmic streaming and cyclosis, is where there is flow inside the cytoplasm. it is typically observed in large plant and animal cells. here flow means that the cytoplasm is moving inside the cell, it is not stationary.
a fuel cell is an electrochemical cell that converts the chemical energy of a fuel often hydrogen and an oxidizing agent often oxygen into electricity through a pair of redox reactions. fuel cells are different from most batteries in requiring a continuous source of fuel and oxygen usually from air to sustain the chemical reaction, whereas in a battery the chemical energy usually comes .
skimboarding or skimming is a boardsport in which a skimboard much like a surfboard but smaller and without fins is used to glide across the water's surface to meet an incoming breaking wave, and ride it back to shore.wave-riding skimboarders perform a variety of surface and air maneuvers, at various stages of their ride, out to, and back with, the wave.
whitewater is formed in a rapid, when a river's gradient changes enough to generate so much turbulence that air is trapped within the water. this forms an unstable current that froths, making the water appear opaque and white.. the term 'whitewater' also has a broader meaning, applying to any river or creek that has a significant number of rapids.
flotation of objects denser than water occurs when the object is nonwettable and its weight is small enough to be borne by the forces arising from surface tension. for example, water striders use surface tension to walk on the surface of a pond in the following way. the nonwettability of the water strider's leg means there is no attraction .
cryptosporidiosis, also known as crypto, is a parasitic disease caused by cryptosporidium, a genus of protozoan parasites in the phylum apicomplexa.it affects the distal small intestine and can affect the respiratory tract in both immunocompetent i.e., individuals with a normal functioning immune system and immunocompromised e.g., persons with hiv/aids or autoimmune disorders individuals .
surface tension is an important factor in the phenomenon of capillarity. surface tension has the dimension of force per unit length, or of energy per unit area. the two are equivalent, but when referring to energy per unit of area, it is common to use the term surface energy, which is a more general term in the sense that it applies also to solids.
foam is an object formed by trapping pockets of gas in a liquid or solid.. a bath sponge and the head on a glass of beer are examples of foams. in most foams, the volume of gas is large, with thin films of liquid or solid separating the regions of gas. soap foams are also known as suds.. solid foams can be closed-cell or open-cell.in closed-cell foam, the gas forms discrete pockets, each .
the world is flat: a brief history of the twenty-first century is an international best-selling book by thomas l. friedman that analyzes globalization, primarily in the early 21st century. the title is a metaphor for viewing the world as a level playing field in terms of commerce, wherein all competitors have an equal opportunity.
capillary electrophoresis ce is a family of electrokinetic separation methods performed in submillimeter diameter capillaries and in micro- and nanofluidic channels.very often, ce refers to capillary zone electrophoresis cze , but other electrophoretic techniques including capillary gel electrophoresis cge , capillary isoelectric focusing cief , capillary isotachophoresis and micellar .
other types of light-duty automotive tires include run-flat tires and race car tires. run-flat tires—run-flat tires obviate the need for a spare tire, because they can be travelled on at a reduced speed in the event of a puncture, using a stiff sidewall to prevent damage to the tire rim.
rouleaux singular is rouleau are stacks or aggregations of red blood cells rbcs that form because of the unique discoid shape of the cells in vertebrates.the flat surface of the discoid rbcs gives them a large surface area to make contact with and stick to each other; thus forming a rouleau.
the world is flat: a brief history of the twenty-first century is an international best-selling book by thomas l. friedman that analyzes globalization, primarily in the early 21st century.the title is a metaphor for viewing the world as a level playing field in terms of commerce, wherein all competitors have an equal opportunity. as the first edition cover illustration indicates, the title .