Problem: Article: Get a water hose, open tap, or shower and soak the victim with fresh, clean water. Continue to pour water on the areas with acid for 20 minutes at least. Rotate the stream of water, so that the acid is pushed away from the victim’s body and onto the ground.  The water must be clean or you risk causing an infection within the forming burns. If you only have a water bottle, go ahead and use it on the wounds. However, yell out to others for more water or move the victim closer to a water source. If acid gets into the eye, it can burn through the cornea and cause blindness. If you suspect that the victim’s eye has acid on it, have them bend their head downwards. Pour a stream of clean water over the eye for 20 minutes or as long as possible.  If you can, gently open the victim’s eyelid, so that the water actually reaches the eye itself. Otherwise, the acid can stay hidden under the lid and continue to burn. Avoid touching the eye itself, as you could contaminate the burn. If the person is lying or sitting on the ground, don’t let them lie in a pool of water after rinsing them off. You may need to move them a few times during the rinsing process. If they can stand with assistance at the water’s source, such as a shower, then that is even better.
Summary: Flush the injured area with water. Rinse out an affected eye by holding it under running water. Move the victim away from the flushed water.

Problem: Article: Private investigators (PIs) can be hired to find and analyze information regarding legal, personal, and financial matters. They offer services such as background checks, investigating suspected marital infidelities, conducting employment screenings, verifying a person's identity, finding missing people, and recovering stolen property. In most states, licensed PIs have passed pass the private investigator examination, be at least 25 years of age, and completed 3 years of professional experience. They must also pass a criminal history and background check administered by the Department of Justice and FBI, and be licensed by the Department of Consumer Affairs. Be smart about who you hire. You can search for PI agencies in your area online or in the phone book. If you do not have prior experience with a particular agency, contact a consumer assistance group (e.g. Better Business Bureau). Ask about any complaints and/or the nature of complaints filed against an agency. You can also search online reviews from sites such as AngiesList.com.  Compare prices and services offered by different companies. Interview a potential investigator. Ask them to show you their state-issued PI ID card. Record their name, license number, and expiration date.  Validate their business or individual license by following-up with your state's Department of Consumer Affairs. Once you select a PI, it is important to obtain a written contract This should include agreement on what services will be offered, a list of fees and payment obligations, and length of time service will be retained. The contract should also stipulate that the client will have access to evidence (recordings, videotapes, etc.) collected during the investigation. Finally, the PI is obligated to provide a final case report that includes results of the investigation, and cost and time spent on separate aspects of the case (e.g. surveillance, additional investigators, special equipment, stand-by time, etc.).  Read the contract carefully and do not hesitate to ask questions. Stipulate a deadline by which all work will be completed. Request an itemized estimate of services to be offered as part of the contract, and have the company provide an official invoice and receipt. Keep a copy of the contract, invoices, and receipts in a single folder.
Summary: Hire and retain a private investigator. Choose a licensed private investigator. Draft a contract.

Problem: Article: The amplifier has a specific power rating and impedance rating. The speaker load needs to fit within these ratings or you will blow your speakers and/or burn up your amp. You need to understand the basics of wiring speakers before your start the job. No matter how much you are spending on an amp or a head unit, if you have low quality speakers, you will get low quality sound. Speakers come from 1" tweeters to 15"+ subwoofers. Generally, a smaller speaker gives clearer highs and bigger speakers give deeper lows. Mid-range speakers come in 2 way (plays high and low) and 3 way (plays highs mid and lows). Speaker placement is important to consider. The difference in distance between the listener and one speaker as opposed to the others will change the perceived sound. It is recommended that speakers go in the kick panel when possible. However, it is sometimes necessary to put them in other locations, such as the trunk, for space purposes. As described in the “Upgrading by Installing an Amp” section, you will need a spool of wire to run from the speakers to the amp (unless you are replacing a pre-existing speaker and the wire is already there). Your wiring will differ depending on whether you are wiring in series or in parallel.
Summary: Match your speakers to your amplifier. Purchase the best quality speakers in your budget. Find a home for your speakers. Wire the speakers to the amp.

Problem: Article: d = R * arccos(R/(R + h)), where• d = distance to horizon• R = radius of the Earth• h = height of eye The geometric horizon calculated using the method in this article may not be the same as the optical horizon, which is what your eye actually sees. Why is this?  The atmosphere bends (refracts) light that is traveling horizontally. What this usually means is that a ray of light is able to slightly follow the curvature of the earth, so that the optical horizon is a bit further away than the geometric horizon. Unfortunately the refraction due to the atmosphere is neither constant nor predictable, as it depends on the change of temperature with height. There is therefore no simple way to add a correction to the formula for the geometric horizon, though one may achieve an "average" correction by assuming a radius for the earth that is a bit greater than the true radius. This will calculate the length of the curved line that follows from your feet to the true horizon (shown in green in this image).  Now, the arccos(R/(R+h)) portion refers to the angle that is made at the center of the Earth by the line going from the true horizon to the center and the line going from you to the center.  With this angle, we multiply it by R to get the "arc length," which, in this case, is the distance that you are looking for.
Summary:
Calculate the actual distance you'd have to traverse to get to the horizon by using the following formula. Increase R by 20% to compensate for the distorting refraction of light rays and to arrive at a more accurate measurement. Understand how this calculation works.