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Temperature. Done By: Jap Xin Yi. Assignment 5. Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold.
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Temperature Done By: Jap Xin Yi Assignment 5
Temperatureis a physical property of matter that quantitatively expresses the common notions of hot and cold. • As human, we have body temperature. Animals are also have too. Have u ever think that when the birds are building their nest, they will have temperature left on it.. • Baby birds will recognize the temperature. When the temperature is changed, they could not adapt to it and maybe they will die because of the change of temperature. • Temperature maybe is one of the most important element for the nest . • In the summer, heat builds up under the rear roofed section, the lack of air flow can be detrimental to the nesting or roosting birds. Equally in winter, the overnight cold will reduce the aviary temperature and that of the nest. The lack of air movement may delay the warming of the rear of the aviary and nest. The lack of warmth may reducethe growth rate of the young, delay the development of the egg or make the parent bird lethargic.
Working on Pectoral Sandpipers, Jane Reid tested the hypothesis that using a lined scraped reduces the rate of clutch heat loss and investigated whether scrapes are effectively designed to minimize heat loss rates. Observed scrape depth approximately equaled that which minimized convective cooling while minimizing conductive heat loss. • Besides, to ensure the eggs developing in a normal way, the temperature is very important. The ideal incubation temperature for many birds’ eggs is about human body temperature 98.6 degrees F. To create the temperature, almost all birds will sit on the eggs to transfer their body heat to the eggs. • Most of the birds will transfer their heat through bare area of abdominal skin called the ‘brood patch’. But there are some of the birds transfer their heat through webbed feet. The embryo inside the egg is very sensitive to the high temperature. So, the eggs must be protected from the sun.
Some of the birds even shade the eggs when the temperature is increased. They use the feathers of their bellies to wet the eggs before shading to cool the developing embryo by evaporative heat loss. • Shading the eggs will also prevent heat loss when the temperature is low. However, the embryo are less sensitive to the cold than heat. Instead egg temperature is regulated in response to changes in the temperature of the environment by varying the length of time that a parent bird sits on them or the tightness of the "sit." For instance, female House sat on the eggs for periods averaging 14 minutes when the temperature was 59 degrees F (15 degrees C), but an average of only 7.5 minutes when it rose to 86 degrees F (30 degrees C).
Many birds apparently sense the egg temperature with receptors in the brood patches, which helps them to regulate their attentiveness more accurately. Since the embryo itself increasingly generates heat as it develops, periods of attentiveness should generally decline as incubation progresses. Attentiveness is also influenced by the insulating properties of a particular nest.Eggs are also turned periodically from about every eight minutes by American Redstarts to once an hour by Mallards. The turning presumably helps to warm the eggs more evenly, and to prevent embryonic membranes from sticking to the shell
Touch Fluorescent Lamps • Like in all mercury-based gas-filled tubes, mercury is slowly absorbed into glass, phosphor, and tube electrodes throughout the lamp life, where it can no longer function. Newer lamps now have just enough mercury to last the expected life of the lamp. Loss of mercury will take over from failure of the phosphor in some lamps. The failure symptoms are similar, except loss of mercury initially causes an extended run-up time to full light output, and finally causes the lamp to glow a dim pink when the mercury runs out and the argon base gas takes over as the primary discharge. • Subjecting the tube to asymmetric waveforms, where the total current flow through the tube does not cancel out and the tube effectively operates under a DC bias, so the temperature is low.
