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Dwarf Stars
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Are Richter Scale Magnitudes or Moment Magnitudes more accurate?
The Moment Magnitude scale is more accurate overall.
What scale is used to measure the energy released by an earthquake?
The moment magnitude scale is used by seismologists to measure the amount of energy released by large earthquakes (those greater than magnitude 8.0). For smaller earthquakes (those with magnitudes less than 7.0 and with epicentres less than 650 km from a seismometer station may be used) the method devised by Richter (the Richter magnitude scale) may be used to estimate the magnitude. The surface wave magnitude scale may be used for earthquakes with magnitudes up to 8.0 (devised by Richter and Gutenberg to extend the utility of the Richter scale.) Richter magnitudes are generally easier to derive than moment magnitudes being based on direct seismometer measurements, whereas the moment magnitude is a more4 fundamental measurement of magnitude being based on the rock mass strength around the fault, the amplitude of fault movement and the cross sectional area of that portion of the fault that moved. However this is more difficult to measure. As such it is common for initial reports to be in Richter magnitudes and more detailed letter magnitudes to be reported as moment magnitudes.
What is the difference between shallow focus earthquakes and deep focus earthquakes?
Shallow focus earthquakes occur at depths of 70 km with magnitudes ranging from 1-5. Deep focus earthquakes occur at depths from 300-700 km and magnitudes from 6-10.
The Fahrenheit absolute scale is called the scale?
The Fahrenheit scale is not absolute and also is obsolete.The absolute scale is Kelvin.
What is coulombs law of electric force?
Two point charges attract or repel each other with a force which is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them. Where, [In SI, when the two charges are located in vacuum] − Absolute permittivity of free space = 8.854 × 10−12 C2 N−1 m−2 We can write equation (i) as
Have absolute magnitudes of ones or less?
dwarf stars -Sydney-
Is it possible for two regular stars to have the same absolute magnitude but different apparent magnitudes?
Yes, if the matter surrounding one star is more dense than that surrounding the other it would appear to be less bright.
What type of star has high absolute magnitudes and high temperatures?
supergiant
How much brighter are supergiants than giants?
According to Wikipedia giants have absolute magnitudes around 0 to -1 while supergiants have absolute magnitudes around -5 so they are 50-100 times brighter (5 magnitudes difference equals 100 times brighter).
How can 2 stars of the same apparent magnitude could have different absolute magnitudes?
The less luminous one is closer to the observer, just as a candle in the same room can seem as bright as a sodium vapor lamp down the street.
How 2 stars could have the same apparent magnitude but different absolute magnitudes?
ble
Does a red giant or a white dwarf star have greater absolute?
Red giants have typical absolute magnitudes which are 10-15 magnitudes below white dwarfs, which means that the red giants are 10,000-1,000,000 times brighter, after due allowance for distance.
What is a plus add a minus?
It can be a plus or a miuns - depending on which one of the two had a greater absolute value. Also, it will be nearer to zero than the larger of the two magnitudes.
Can a vector have zero magnitudes if one of its component is not zero?
No. The magnitude of a vector can't be less than any component.
Does our sun have a lower absolute magnitude then Betelgeuse?
Our sun has an absolute magnitude of 4.83, compared to Betelgeuse's absolute magnitude of -6.05. This means that Betelgeuse is more than 10 magnitudes brighter than our sun.
Spica and Rigel have similar surface temperatures but their absolute magnitudes are different why is this?
Spica has a surface temperature of 22,400K and an absolute magnitude of -3.55Rigel has a surface temperature of 11,000K and an absolute magnitude of -6.7So the question is incorrect.
What is the absolute and apparent magnitude of a giant star?
Magnitudes require distance and luminosity. Therefore a specific star is required.
