The figure below shows a moving source of light with four stationary observers at different locations.Which observer will see red-shifted light from the moving source? 
Definitions:
Explanatory Variables
Variables in a statistical model that are believed to explain or influence changes in a response variable.
Standard Deviation
A measure of the dispersion or variability within a set of data points, indicating how spread out the values are from the mean.
Sample Mean
The average value of a sample set of numbers, used as an estimator of the population mean in statistical analysis.
Marathon Runners
Individuals who participate in marathons, long-distance running races typically covering a distance of 42.195 kilometers or 26.219 miles.
Q1: What are the main types of collective
Q1: _ proposed the continental drift hypothesis.<br>A) Harry
Q3: Which of the following is a mineral?<br>A)
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Q47: Describe the difference between the relative viscosity