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Who first used RR Lyrae variable stars to determine distances in your milky way?
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Who attempted to measure the relative distances to the moon and sun?
nobody
What does the red shift of the galaxies tell us about their motion with respect to the Earth?
Less than you'd think. At extreme distances, the red-shift is caused by metric expansion more than by motion. So to be able to gauge the speed of an object relative to you, you'd first have to determine the pseudo-speed caused by metric expansion.
If one star has a parallax ten times larger than another's the first star is?
The first star is closer to the earth than the second. The exact distances will depend on how large the angles are and also how far the star is away from the perpendicular to the earth's ecliptic. In any case, the distances will depend on trigonometric ratios and the distance to the first star will not be one tenth the distance unless the angles are very small.
What two variables are used to classify stars?
The first variable that is used to classify stars is its ionization state which can measure the photosphere's temperature and density. This information is gathered by splitting the light from a star with a prism and observing the resulting spectrum that includes absorption lines. Luminosity is another variable used; it is based on the width of absorption lines.
Why cant you see the stars in the first picture a few months later?
the earth moves and different seasons determine which stars come out
How do you determine which variable goes on the x axis on a line graph?
You can determine which variable that goes on the x axis on a line graph by checking the number that comes first in a set of pair or from table, e.g [2,4]. 2 will be on the x axis because it is the first number in the pair
How do you determine if three points are a right angle?
First join the points and find their respective distances and then just use the Pythagoras Theorem
How do you find the volume and density if only the mass was given?
You cannot. You can determine the third variable if two are given but not determine two when given only one. You have to find some other way to first determine volume or density.
Is the highest Either variable first?
The high is power of either variable is the first
Why are there two regression lines?
There are two regression lines if there are two variables - one line for the regression of the first variable on the second and another line for the regression of the second variable on the first. If there are n variables you can have n*(n-1) regression lines. With the least squares method, the first of two line focuses on the vertical distance between the points and the regression line whereas the second focuses on the horizontal distances.
How can you determine the type of solution from observing an equation?
you first look at the varaibles and their power if there is more than one variable then you will have how ever many variables there are that's how many separate answers there will be also, if you have a number to the power or 2 then there will be two answers for that ONE variable... if you have a number to the power of 8 then you will have eight answers for the one variable.
What comes first independent or dependent variable?
Independent variable
What variable goes first in the title of a line graph for science?
The dependent variable goes first.
What is the independente variable?
Independent variable(manipulated variable) is a variable that is changed delibertly by the experimentor. *most of the time the first part of a projects question is the independent variable.
Does the independents variable or the dependent variable come first in a hypothesis?
independent
How does your equipment determine your level of precision?
Any equipment has some method of displaying the measurement of some variable (or variables). The equipment can determine your precision in two ways. The first is on its calibration: how large its "zero error" is. The second is in the precision of the display used to provide the measurement.
Why is the output value called the dependent variable?
because it can change according to the independent variable. this dependent variable depends on the independent variable for its output. the independent variable is not affected by the dependent variable because the independent variable if found out first.
