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What star has a surface temperature 9000k and luminosity about 1 to 20 times greater than the sun?
Wiki User
∙ 11y ago
Sirius
Wiki User
∙ 11y ago
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How much 9000k?
It is: 9,000,000 because k = 1,000
How much do video game designers make in Ohio?
they make form 2903k a day from 9000k a day in Ohio. depends on what game and if you are sponsored not sponsored around 104k and sponsored 1999k a day they make form 2903k a day from 9000k a day in Ohio. depends on what game and if you are sponsored not sponsored around 104k and sponsored 1999k a day
How hot is 9000 degrees kelvin in celsius?
The answer is 8726.85 C (approx.). The Kelvin scale starts at absolute zero and is used in scientific laboratories. Celsius is for general use and set 0 and 100 as melting and boiling point of water respectively. To convert from K to C, subtract 273.15 from K.
Slope of the volts vs resistance characteristics for fluroscent and incandescent lamps?
the resistance of an incandescent lamp is very low until it reaches its operating temperature of 6000deg K or so get a sixty watt bulb and measure its resistance chances are its under 5 ohms depending on the mass of tungsten it takes a few cycles at this 60 amps to get up to temperature. voltage is constant calling the wiring a voltage source (if the wiring didnt have resistance the bulbs of higher wattages would probably burn out when starting) fluorescent lamps have a bit of mercury in a near vacuum nearly infinite resistance when cold it is heated to boiling with a combination of either filaments and/or high voltage then the gas changes to plasma and its in essence a better conductor than solid metal at that temperature 9000K or so an 8foot tube starts at 800v to 1000v and may run at under 100 depending on the ballast (preheat. rapid start. instant start) and the power (normal,HO,VHO,SHO) the ballast mostly limits the current the plasma can consume but is necessary to start the plasma conducting in longer tubes
What is short time current?
instantaneous current transient current inrush current Photoflash Uses a Xenon tube in parallel with a capacitor capacitors in the hand held variety of photo flash are charged slowly with some sort of battery and oscillator when the capacitor is charged to 600V or so it is ready to discharge there will be an ignition coil to ionize the Xe when the Xe starts to completely ionize In a 1" long tube its resistance fall from near infinity to 1/2 Ohm This is about 1200 Amps those little cameras use #20 wire the average current is well below 1 amp to figure the wire size i^2 * R is not so significant more easily approximated as I^2*t you figure the amount of power with I^2*r and the amount of time this times the mass of the wire tells you how long it will take for the wire to melt witch is how fuses work photoflash the wire made from Xenon molecular wt 54 takes a while to heat to 9000K or so and to take pictures we like the black body spectrum rather than the bright bands in the uv its very near sunlight This takes about 1 millisecond the flash tube for a ruby laser is usually krypton wt 32 this heats much faster the flash lasts for about a 1 Microsecond this flash runs the ruby up to those higher energy levels then as a few discharge and trigger others this happens in about 1Nanosecond A short time
