Compared to a cylindrical chamber of the same volume, a spherical or near-spherical chamber offers the advantage of less cooling surface and weight; however, the spherical chamber is more difficult to manufacture and has provided poorer performance in other respects. The value of this factor is significantly greater than the linear length between injector face and throat plane. The contraction ratio is defined as the major cross-sectional area of the combuster divided by the throat area.

Due to the nature of the mathematics on this site it is best views in landscape mode. If your device is not in landscape mode many of the equations will run off the side of your device should be able to scroll to see them and some of the menu items will be cut off due to the narrow screen width.

Linear Differential Equations The first special case of first order differential equations that we will look at is the linear first order differential equation.

In this case, unlike most of the first order cases that we will look at, we can actually derive a formula for the general solution. The general solution is derived below. However, we would suggest that you do not memorize the formula itself. Instead of memorizing the formula you should memorize and understand the process that I'm going to use to derive the formula.

Most problems are actually easier to work by using the process instead of using the formula. So, let's see how to solve a linear first order differential equation. It's sometimes easy to lose sight of the goal as we go through this process for the first time.

In order to solve a linear first order differential equation we MUST start with the differential equation in the form shown below. In other words, a function is continuous if there are no holes or breaks in it.

Do not, at this point, worry about what this function is or where it came from. We can now do something about that. All we need to do is integrate both sides then use a little algebra and we'll have the solution.

It is vitally important that this be included. If it is left out you will get the wrong answer every time. This will NOT affect the final answer for the solution.

So with this change we have. There is a lot of playing fast and loose with constants of integration in this section, so you will need to get used to it. When we do this we will always to try to make it very clear what is going on and try to justify why we did what we did.

This is actually an easier process than you might think. So, to avoid confusion we used different letters to represent the fact that they will, in all probability, have different values. This will give us the following.

We do have a problem however. This is actually quite easy to do. We will not use this formula in any of out examples. Solution Process The solution process for a first order linear differential equation is as follows.

Integrate both sides, make sure you properly deal with the constant of integration. Example 1 Find the solution to the following differential equation. Now multiply all the terms in the differential equation by the integrating factor and do some simplification.

Either will work, but we usually prefer the multiplication route.Time. Time is what a clock is used to measure. Information about time tells the durations of events, and when they occur, and which events happen before which others, so time has a very significant role in the universe's organization.

Simply knowing how to take a linear equation and graph it is only half of the battle. You should also be able to come up with the equation if you're given the right information.

This is an artist's concept of the metric expansion of space, where space (including hypothetical non-observable portions of the universe) is represented at each time by the circular sections. Problem: Solution: Two students are bouncing-passing a ball between them. The first student bounces the ball from 6 feet high and it bounces 5 feet away from her.

The second student is 4 feet away from where the ball bounced.. Create an absolute value equation to represent the situation. Absolute value equations have two solutions.

Plug in known values to determine which solution is correct, then rewrite the equation without absolute value brackets. Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.

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Piecewise Functions – She Loves Math