Problem: Write an article based on this summary: Hire a building inspector to look at your land and home. Replace old utility pipes. Install support piers while constructing your home. Hire a specialist to perform chemical grouting on small sinkholes under your home. Contact a contractor to perform compaction grouting on larger sinkholes.

Answer: If you’re about to purchase or already own a house in an area that experiences many sinkholes, a building inspector will be able to survey your land and the ground beneath it. They can tell you about your risk for having a sinkhole and might recommend taking preventative action. The inspector will likely charge a small fee for doing the surveying, but it’s a worthwhile investment in the long run. Call a contractor to have this work done professionally, as it requires the digging out and removal of all aging pipes. Then, the contractor will install new pipes attached to your home before replacing the soil.  Your community may have funds available for replacing aging pipes, so you should contact your local government before deciding on a contractor. Contact your utility company before beginning construction, as they will be able to stop your service while work is being done. If you live an area where sinkholes are a known problem, such as Florida, the builder of your home will likely be familiar with this preventative process. The piers will help support your home in the case of a sinkhole because they are anchored into more stable rock formations deep below the soil. If a shallow sinkhole that is less than 15 feet (4.6 m) below the surface of the ground occurs beneath your home or on your property, you can use chemical grouting to address the problem early. Chemical grouting injects chemicals into the ground that fill cracks, secure loose soil, and repair the sinkhole. As soon as you notice some sinking on your land, you should contact a specialist in your area and get a price quote for this service. Compaction grouting is a method similar to chemical grouting, but for more severe and deeper sinkholes. This method injects a mixture of particles and chemicals into the ground to fill cracks, holes, and chemically seal the rock layer. It prevents any further degradation of the rocks that cause sinkholes. This service will be more expensive than just chemical grouting, but will make your home stable and prevent further sinkholes from forming over long periods of time.


Problem: Write an article based on this summary: Check the label for a nominal impedance rating. Set a multimeter to measure resistance. Remove the speaker from its cabinet or open the back of the cabinet. Cut off the power to the speaker. Connect the multimeter leads to the speaker terminals. Estimate the impedance from the resistance.

Answer: Most speaker manufacturers list an impedance rating on the speaker label or the packaging. This "nominal" impedance rating (usually 4, 8, or 16 ohms) is an estimate of the minimum impedance for typical audio ranges. This usually occurs at a frequency between 250 and 400 Hz. The actual impedance is fairly close to this value within this range, and rises slowly as you increase the frequency. Below this range, the impedance changes rapidly, peaking at the resonant frequency of the speaker and its enclosure.  Some speaker labels display an actual, measured impedance for a specific listed impedance. To give you an idea of what these frequencies mean, most bass tracks fall between 90 and 200 Hz, while "chest thumping" sub bass can be as low as 20 Hz. The midrange, including the majority of non-percussion instruments and voices, covers 250 Hz to 2kHz. A multimeter sends out a small DC current to measure resistance. Since impedance is a quality of AC circuits, this will not measure impedance directly. However, this approach will get you close enough for most home audio setups. (For example, you can easily distinguish between a 4 ohm and 8 ohm speaker this way.) Use the lowest range resistance setting. This is 200Ω for many multimeters, but a multimeter with a lower setting (20Ω) may give more accurate results.  If there is only one setting for resistance, your multimeter is auto-ranging, and will find the correct range automatically. Too much DC current can damage or destroy the voice coil of a speaker. The risk is low here, since most multimeters only produce a small current. If you're dealing with a loose speaker with no connections or speaker box, then there is nothing you need to do here. Any power running to the speaker will ruin your measurement, and could fry your multimeter. Turn off the power. If the wires connected to the terminal are not soldered on, detach them. Do not remove any wires connected directly to the speaker cone. Look closely at the terminals and determine which is positive and which is negative. There is often a "+" and a "-" sign to identify them. Connect the multimeter's red probe to the positive side, and the black probe to the negative side. Typically, the resistance reading should be roughly 15% less than the nominal impedance on the label. For example, it's normal for an 8-ohm speaker to have a resistance between 6 or 7 ohms. The majority of loudspeakers have a nominal impedance of 4, 8, or 16 ohms. Unless you get a strange result, it's safe to assume your speaker has one of these impedance values for the purpose of pairing it with an amplifier.


Problem: Write an article based on this summary: Pay attention to your appearance. Show him how you feel with your body language. Flirt with him. Break the touch barrier. Compliment him. Ask if he likes anyone. Tell him you're open to having a boyfriend. Get him to ask you out.

Answer:
Let him know that you like him by making an effort to look nice whenever you're around him. You should still be yourself, but take extra care with your hair and makeup and outfits, so he can start to notice you. You don't have to wear a tight dress and high heels if you're at a baseball game with him, but let him know that you care about your looks when you're around him..  Don't be afraid to be a little sexy. If you're comfortable with your body, show it off. If you're not comfortable with a lot of makeup, then you shouldn't try to look like someone else just to impress him. Try wearing a little lip gloss, and applying it in front of him. This will make him pay more attention to your lips. Your body language can let the guy know that you think of him as more than a friend. When you're talking to him, turn your body toward him and make eye contact to show that he means a lot to you. Don't be distracted by turning your body away, looking around, or checking your phone. The more you flirt with the guy, the more he'll be sure that you like him. You can start off by flirting subtly and work your way up to being more obvious. Once you get closer to the guy, don't be afraid to gently hit him on the arm or shoulder if he's said something funny. You can make physical contact if you're teasing each other, or even give him a big hug when you meet up, if it feels right. Breaking the touch barrier will help him see that you want to get closer to him.  Just make sure that he wants to touch you too and that you're not making him uncomfortable. If you're getting close with the guy and just came back from a run together or some other form of physical activity, offer to give him a massage. If he likes you, he'll say yes, and he'll start to see how good you can make him feel. It can be tricky to compliment a guy without making it too obvious that you like him. You don't have to say, "Wow, you're so hot" to let a guy know that you like him through some subtle compliments. If he got a new haircut or is wearing an obviously new shirt, just tell him that he looks nice. If he's really good at a skill, whether it's math or making a great sandwich, let him know he's good at it. This is not the most subtle way to show that you like him, but it'll do the trick. Just casually ask if he likes anyone, or even talk about what he's looking for in a girlfriend. Let him open up and see if he tells you he likes anyone or what he's looking for. Just be careful -- let him see that you're asking for your own motives, not because you want to be a great buddy and talk about his love life. Just casually mention that you're looking to date someone and that you look forward to having a boyfriend. Don't make it sound like you're desperate to date anyone around you -- show him that you've put a lot of thought into it. You can be more obvious and even talk about the qualities you're looking for in a boyfriend, and list some of the things that make him special. You can try to get the guy to ask you out as a way to show him that you like him. Just casually talk about your upcoming plans or mention what your schedule looks like, and wait for him to ask if you want to do something when he knows you'll be free.