Assignment Graph (see next page for graph paper grid) Using the data from the Coal Production Table, create a graph of coal usage in each region over the years. The x-axis should be years, and the y-axis should be coal production. Use a different symbol or color to represent each region. Remember to include titles and labels. Scan or take a picture of your graph and submit it with your assignment. Analysis Changes over time are called trends. You can see on the graph a downward trend in the Appalachian and Interior regions and an upward trend in the Western region. Try predicting future coal production. Using a ruler, draw the lines for each region. Go beyond 2011. Draw the line with the same pattern it follows on the graph. The extension of the lines is based on what you predict will happen with coal production.​

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answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.