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No device should be left on if you're fiddling with it.  Turn off any and all electrical power to the pump and system at the breaker panel. You can also go to the base of the pump to make sure it's turned off. On a pool pump, this will be the strainer basket. If you're not working with a pool pump, use whatever fixture is closest to the water tank. Check all piping and fittings for any cracks,, or damage, especially if system was shut down over the winter. Check each drain plug to see if it needs re-tightening, and manually operate any valves. Ensure that all nuts, bolts and anchoring fasteners of the pumping system are in place and tightened properly. You should also inspect any safety guards, belts and pulleys that there might be. Flush the hose to remove any build-up and ensure you have clean water. Run water through it, keeping a constant stream for a few seconds before you shut it off. This is especially important for hoses that aren't routinely used or haven't been used yet this season. Many people choose to use their garden hose or their washing machine hose connected to their garden hose. However, if your garden hose contains lead, know that you shouldn't drink from it. If you're using this for a well, be sure you have a way of filtering the water before and after it's through the hose. This will keep pressure from building up. Watch your water pressure gauge to make sure all is going according to plan.

summary: Turn off electrical power to the pump. Locate a plumbing fixture that provides access to the pump system. Inspect the system for damage. Prepare a hose that can be connected to an independent water source. Open any relief valves on the pump system.


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Suppose, as a different problem, that you know two sides and need to solve an unknown angle. You are given that side A is 10 inches long, side B is 7 inches long, and angle α{\displaystyle \alpha } is 50 degrees. You can use this information to find the measurement of angle β{\displaystyle \beta }. Set up the problem as follows:  Asin⁡α=Bsin⁡β{\displaystyle {\frac {A}{\sin \alpha }}={\frac {B}{\sin \beta }}} 10sin⁡50=7sin⁡β{\displaystyle {\frac {10}{\sin 50}}={\frac {7}{\sin \beta }}} sin⁡β=7sin⁡5010{\displaystyle \sin \beta ={\frac {7\sin 50}{10}}} sin⁡β=7∗0.76610{\displaystyle \sin \beta ={\frac {7*0.766}{10}}} sin⁡β=0.536{\displaystyle \sin \beta =0.536} In the above example, the law of sines provides the sine of the selected angle as its solution. To find the measure of the angle itself, you must use the inverse sine function. This is also called the arcsine. On a calculator, this is generally marked as sin−1{\displaystyle \sin ^{-1}}. Use this to find the measure of the angle. For the example above, the final step is as follows:  sin⁡β=0.536{\displaystyle \sin \beta =0.536} β=arcsin⁡0.536{\displaystyle \beta =\arcsin 0.536}  β=32.4{\displaystyle \beta =32.4}. Suppose you are told that angle α=30 degrees{\displaystyle \alpha =30{\text{ degrees}}}, angle β=50 degrees{\displaystyle \beta =50{\text{ degrees}}}, and side C, which connects them, is 10 inches long. Find the measurement of all sides and angles for the triangle.  First, you should recognize that you do not yet have enough information for the sine rule to apply. The sine rule requires that you have at least one pair with an angle that opposes a known side. However, you can calculate the third angle of this triangle using simple subtraction. All three angles add up to 180 degrees, so you can find angle γ{\displaystyle \gamma } by subtracting: γ=180−α−β=180−30−50=100{\displaystyle \gamma =180-\alpha -\beta =180-30-50=100}  Now that you know all three angles, you can use the sine rule to find the two remaining sides. Solve them one at a time:  Csin⁡γ=Bsin⁡β{\displaystyle {\frac {C}{\sin \gamma }}={\frac {B}{\sin \beta }}} 10sin⁡100=Bsin⁡50{\displaystyle {\frac {10}{\sin 100}}={\frac {B}{\sin 50}}} 10sin⁡50sin⁡100=B{\displaystyle {\frac {10\sin 50}{\sin 100}}=B} 10∗0.7660.985=B{\displaystyle {\frac {10*0.766}{0.985}}=B} 7.78=B{\displaystyle 7.78=B}   Thus, side B is 7.78 inches long. Now solve for the final remaining side.  Csin⁡γ=Asin⁡α{\displaystyle {\frac {C}{\sin \gamma }}={\frac {A}{\sin \alpha }}} 10sin⁡100=Asin⁡30{\displaystyle {\frac {10}{\sin 100}}={\frac {A}{\sin 30}}} 10sin⁡30sin⁡100=A{\displaystyle {\frac {10\sin 30}{\sin 100}}=A} 10∗0.50.985=A{\displaystyle {\frac {10*0.5}{0.985}}=A} 5.08=A{\displaystyle 5.08=A}   Side A, therefore, is 5.08 inches long. You now have all three angles, 30, 50 and 100 degrees, and all three sides, 5.08, 7.78, and 10 inches.

summary: Solve for an unknown angle. Use the inverse function if needed to find the angle. Solve a problem with incomplete information.


Summarize the following:
Think about whether you want to make a few larger posters on posterboard or many posters on regular paper to put everywhere. You could also choose to do both. Go to a office supply store and figure out your options. For continuity, and to make it easy for people to remember you and your campaign, you might want to choose a color scheme that you stick to in your posters -- red and black or blue and white -- whatever you choose. Avoid neon colors, as some may think it is too bright. If you're artistic, think about how to use your skills best. If you aren't artistically-minded, think of other ways to get people's attention. Stickers can also be fun, but might get expensive if you make a lot of posters.  Will you draw something, or create it on the computer? What kind of impression do you want to create -- professional, funky, well-organized? Do you want to include an image of you? Photo or drawn? Have friends and family look at it and give you suggestions. Once you've decided if you want to incorporate their suggestions, work on making a final version of your model. If it's posterboard, you're going to have to replicate it multiple times. If it's something you can copy, all you'll have to do is find a place where you can make the copies of your model poster.
summary: Find paper or posterboard you like. Decide on how you will decorate your poster. Make a model poster.