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The luminosity of a star is related to its .?
At a higher temperature, the star will shine more brightly for each square meter of surface. The total luminosity per square meter is approximately proportional to the fourth power of its absolute temperature. This refers to the energy output, considering all types of electromagnetic waves, not just visible light.
What factor affects the absolute brightness of a star?
Energy output, as absolute brightness (magnitude) is taken at a standard distance of 10 parsecs.
How do photodisintegration and neutronization contribute to the demise of a massive star?
Photodisintegration and neutronizatoin both absorb some amount of energy to be carried forth and so contribute to the rapid cooling of the core, which accelerates the collapse of the star, since the reduced energy output disrupts the hydrostatic equilibrium of the star's layers.
How can two stars have the same absolute magnitude but be differents sizes?
The idea is that a larger star may be cooler - emit less energy per square meter of surface. The total energy emitted is equal to the surface area, multiplied by the energy emitted per unit area.
How many joules of energy would the Death Star's primary weapon have to generate in order to overcome the gravity holding together an earth-sized planet in order to blow that planet apart?
400 Octillion Joules. (400,000,000,000,000,000,000,000,000,000) It's not really a fair question, however. The Death Star, as depicted in the Star Wars movies, is grossly overpowered for its purpose. It would take a tiny fraction of that energy to simply vaporize the surface and wipe out all life. Okay, I admit I did not actually calculate the energy required to vaporize a planet. I simply assumed that the energy output of a Sun like star would be sufficient if it were all turned on puny little Alderaan (or Earth). The Sun outputs 400 Octillion Joules / second.
What is energy output from the surface of a star per second?
heat
Which cell is the energy output of a star?
The energy output of a star is from nuclear fusion. The particles involved with both input and output are atomic (and sub-atomic) in nature not cellular.
Do Hotter stars age more slowly then cooler stars?
The surface temperature is not a reliable indicator about how long a star will last. However, the total energy output is. If a star produces a lot of energy, it will burn through its fuel faster.
How are energy and mass related in a star?
The same as everywhere else. Every mass has associated energy. Every energy has associated mass. Possibly this question is about the energy output of stars. Usually, the more mass a star has the higher its rate of energy output.
What is a supernova and what happens?
A supernova is the catastrophic death of a star, characterized by a massive output of energy.
Why the temperature of the stars vary from one another?
The temperature in the core of a star depends, to a great extent, on:* The star's mass. The general tendency is that high-mass stars are hotter. * Where the star is in its life cycle. The star's core temperature will vary over time. On the other hand, the star's surface temperature also depends on its size. Thus, it is possible that PRECISELY because a star is hotter in the core, it gets bigger, and the surface temperature DECREASES (though its total energy output increases).
Suns core releases heat by what process?
Our sun release energy by a process called convection. Inside the star, energy is transported towards the surface through radiation, but about 1/3 of the outer layer of the star is markedly cooler than the core and the energy is transported by convection from the core to this layer.
Is an orange star hotter then a yellow star?
The temperature of a yellow star's photo sphere is hotter than that of and orange star. However the total energy output of an orange star may be greater than that of a yellow star.
What are 2 characteristics that affect the temperature of a planet?
Distance from the Sun (for star systems not our own, distance from the primary star(s)) the closer to a star the more energy reaches the planet. Atmospheric composition - how much energy gets to the surface and how much is trapped in. Terrestrial composition; what the solid stuff is made of and how it reacts with stellar/solar energies. Some things reflect light back, others absorb the energy and radiate it back as heat. Also, for planets not around the Sun, the size and energy output (heat) of the star(s) would be factored in. :P
What is a measure of the total energy radiated by the star in one second called?
A star's luminosity is the measure of the total energy radiated by the star in one second.
If a red star and a white star radiate energy at the same rate can they be the same size If not which must be the largest Why?
They cannot be the same size. The red star must be larger. Red stars are cooler that blue stars and so radiate less energy for a given amount of surface area. In order to radiate the same amount of energy as a blue star, the red star must therefore have a larger surface area.
The luminosity of a star is related to its .?
At a higher temperature, the star will shine more brightly for each square meter of surface. The total luminosity per square meter is approximately proportional to the fourth power of its absolute temperature. This refers to the energy output, considering all types of electromagnetic waves, not just visible light.
