To calculate the density of water you will need a graduated cylinder, a scale or balance, and water. Graduated cylinders are special containers that have lines or gradations that allow you to measure a specific volume of liquid. In order to find the density, you have to know the mass and volume of the liquid in question. You will use the graduated cylinder to obtain the mass of the water, but you have to subtract out the weight of the graduated cylinder so you know you're only measuring the mass of the water itself. Turn the balance on and make sure it is set to zero. Place the dry, empty graduated cylinder on the balance. Record the mass of the cylinder in grams (g). For example, let's say the empty graduated cylinder weighs 11 grams. It doesn't matter how much water you add, but be sure to note the exact amount. Read the volume by looking at the cylinder at eye level and recording the volume at the bottom of the meniscus. The meniscus is the curve of the liquid that you'll see when you look at the water right at eye level. The volume of water in the graduated cylinder is the volume you will use for the density calculation. Let's say you filled the graduated cylinder with 7.3 milliliters (mL) of volume. Make sure the balance is set to zero and weigh the graduated cylinder full of water. Be careful not to spill any of the water out of the top when you weigh it. If you do spill the water, take note of the new volume and re-weigh the water-filled graduated cylinder. For example, let's say the full graduated cylinder weighs 18.3 grams. To get the mass of the water only, you must subtract out the weight of the graduated cylinder. The result is the mass of the water in the cylinder. In our example, the mass of the graduated cylinder is 11 g and the mass of the cylinder full of water is 18.3 g. 18.3 g 11 g = 7.3 g, therefore the mass of the water is 7.3 grams. Using the equation density = mass/volume, you can determine the density of water. Plug in the values of mass and volume you determined and solve. Mass of the water: 7.3 g Volume of the water: 7.3 mL Density of water = 7.3/7.3 = 1 g/mL
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One-sentence summary -- Gather your materials. Weigh the empty graduated cylinder. Fill the graduated cylinder with water. Weigh the water-filled graduated cylinder. Subtract the weight of the empty cylinder from the full cylinder. Calculate the density by dividing the mass by the volume.

Q: You married your spouse, not your family. While his or her family members are part of the package, they are not a part of your intimacy and they do not share the same journey with the two of you. If you make it very obvious that you're not bothered by jealousy, insinuations, rumors or gossip, it will soon become clear to your S-I-L that her barbs, attitude and meanness aren't pricking you in the way that they used to. Eventually, it ceases to be profitable or enjoyable for her to keep bothering and most likely she'll begrudgingly go and find someone else to taunt and hassle. Spend less time around your S-I-L. In what ways are you putting yourself in her pathway? While it may feel like you have to put up with her, you can find ways to reduce the time spent together. For example, ask other family members to meet you at different times than when she is around, more often than not. Don't always do this, or she will have a legitimate cause for complaining, but time spent with other family members shouldn't always involve her presence. If you live far away and have to visit once a year, stay in your own accommodation to give yourself respite. Take walks, get outside and don't overstay any welcome when it comes to drawn-out family events that press your buttons. Families know the pressure points better than anyone and unfortunately, some like to press them. At such events, your S-I-L probably has alliances that she can set in train to be even more effective, so the less time spent near such complaint-prone cliques, the better. When you are around your S-I-L, try active listening and acknowledgment in place of letting your fog of self-defensiveness take control. When she gets on top of her complaining mountain, instead of trying to topple her off with "if you think that's bad, you should live in my shoes" replies, actually focus on her and try to discern what is really driving her jibes, whining and gossip. By not making this about you, you may be truly surprised at what you unearth.As for responding to her, acknowledge her pain with neutral comments like: "I'm sorry you have had to go through that to pay an electricity bill. It must be hard having four kids chewing through the power each month." Don't offer advice, don't offer how you would deal with it and don't ever offer to pay or pave the way to see her problem resolved. She owns it, you simply acknowledge it. If your S-I-L has been a pain more than once and has even done things to show you up or drag you down, the chances are that she will try to do it again, even when you don't bite. But if you're ready for it and if you're understanding as to where she is coming from (insecurity, loneliness, feeling left out, needing to be in control, etc.), you can be compassionate about her actions and detach yourself from her drama. If you don't carry her load, she'll be forced to do it for herself and will stop seeing you as a viable target.
A: Get on with your lives together. Listen for real. Be compassionate.

Article: If you apply for the examination online, you will be required to pay by credit card. Visa, Mastercard, American Express, Discover are all accepted. If you submit a paper application, you'll need to give your credit card number, or include a cashier's check or money order for the full amount. If you cannot afford to pay the examination fee, there are reduced fee and scholarship programs available through the NAECB. There are over 110 assessment centers throughout the United States and Puerto Rico. The exam will be administered on the computer, by appointment only, and on weekdays. You will be required to complete the examination within 3.5 hours. In order to be allowed to take the test you will need to show the examiner two forms of identification. Before you take your official, timed exam, you can take a practice test. Whether you do the practice exam is up to you but taking it will not cut into your overall time for the official exam. A passing score it between 75 and 100 points out of 100 points. If you don't pass the exam on the first attempt, it's not the end of the world. You can take it again within 12 months of your application date. However, the fee to repeat the examination is $195. You will need to schedule your retake through the NAECB, just as you did for the first test. In order to renew it you will need to prove that you have completed 1000 hours of work in asthma education and you will need to pay a recertification fee. Once you have renewed, your new certificate will be good for 5 years. Information about renewal is available on the NAECB website.
Question: What is a summary of what this article is about?
Pay the examination fee, which is $295. Take the examination at an assessment center. Retake the test if you don't pass the first time. Get recertified after 7 years.

Article: Don't tie it, but don't let air escape. Alternatively, you can just pop it.
Question: What is a summary of what this article is about?
Gather a balloon, flour, a funnel and a small spoon. Place the funnel in the balloon. Pour flour all the way to the top of the balloon. Blow half the balloon up. Pour water on the balloon. Let out a quarter of the air. Tie it firmly. Throw at a tree or wall.