Editing 2009: Hertzsprung-Russell Diagram
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==Explanation== | ==Explanation== | ||
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The {{w|Hertzsprung–Russell diagram}} is a scatterplot showing absolute luminosities of stars against its effective temperature or color. It's generally used to understand a star's age. | The {{w|Hertzsprung–Russell diagram}} is a scatterplot showing absolute luminosities of stars against its effective temperature or color. It's generally used to understand a star's age. | ||
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|30,000 K | |30,000 K | ||
|30 GW | |30 GW | ||
− | |The area where the bolt strikes | + | |The area where the bolt strikes. |
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|{{w|Ivanpah Solar Power Facility|Ivanpah Solar Plant}} Salt Tank | |{{w|Ivanpah Solar Power Facility|Ivanpah Solar Plant}} Salt Tank | ||
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|280 K | |280 K | ||
|78 kW | |78 kW | ||
− | | | + | |Must be average surface temperature as whales are warm-blooded at 37 °C internally, interestingly this and the cruise ship may be the only entries where a significant amount of power produced is conducted away rather than radiated. Also the power seems high compared to what I can find. [https://www.researchgate.net/publication/321972840/figure/fig1/AS:574004013604864@1513864629274/Visible-and-infrared-spectrum-images-of-various-humpback-whale-surfacing-features.png These images] suggest a surface temperature around 295K - 300K for a Humpback whale when surfacing |
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|{{w|Arc lamp}} | |{{w|Arc lamp}} | ||
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|4800 K | |4800 K | ||
|75 W | |75 W | ||
− | |The temperature value here refers to | + | |The temperature value here refers to colour temperature, which for an incandescent bulb is the same as the filament temperature. However tungsten filament lights, commonly referred to as "bulbs", have a colour temperature of between 2400 and 3600 K, and tungsten melts at 3695 K. |
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|LED Bulb | |LED Bulb | ||
|5800 K | |5800 K | ||
|8 W | |8 W | ||
− | |The temperature value here refers to | + | |The temperature value here refers to colour temperature, not physical temperature. Color temperature is a better match to effective temperature than physical temperature. As typical semiconductors might be rated for a maximum of 150 °C or about 420 K, the physical temperature of an LED Bulb is considerably lower than its colour temperature. |
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|Astronomer | |Astronomer | ||
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A human being generating 100 W for 24 hours needs 2065 kcal or 8.64 MJ. According to the UN FAO this is e.g. the typical daily energy output of women with weight 55 kg between 18 and 59 years having a light activity lifestyle of 1.55 times the BMR (basic metabolic rate). | A human being generating 100 W for 24 hours needs 2065 kcal or 8.64 MJ. According to the UN FAO this is e.g. the typical daily energy output of women with weight 55 kg between 18 and 59 years having a light activity lifestyle of 1.55 times the BMR (basic metabolic rate). | ||
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− | |{{w|Hertzsprung–Russell diagram}} | + | |{{w|Hertzsprung–Russell diagram}} (title text) |
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− | |Described in the title text, | + | |Described in the title text, (insert). |
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==Transcript== | ==Transcript== | ||
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:Expanded Hertzsprung-Russell Diagram | :Expanded Hertzsprung-Russell Diagram | ||
:[A scatter plot is shown, with the x-axis labeled Effective Temperature (in kelvins), and the y-axis Luminosity (watts).] | :[A scatter plot is shown, with the x-axis labeled Effective Temperature (in kelvins), and the y-axis Luminosity (watts).] |