When the light from a gas is passed through a prism, why is there only a certain number of lines rather than a continuous spectrum?

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?

Smallest intensity of a stimulus that you can detect 50 percent of the time is

Earth's atmosphere is composed of mostly two gases. name the two gases that make up the majority of the atmosphere and use the pie chart to tell the percentages of each.