Quantum superposition refers to the quantum mechanical property of solutions to the Schrodinger equation. Since the Schrodinger equation is linear, any linear combination of solutions to a particular equation will also be a solution of it. This mathematical property of linear equations is known as the superposition principle. In quantum mechanics such solutions are often made to be orthogonal, such as the energy levels of an electron. By doing so the overlap energy of the states is nullified, and the expectation value of an operator (any superposition state) is the expectation value of the operator in the individual states, multiplied by the fraction of the superposition state that is "in" that state.
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One-sentence summary -- Understand Quantum superposition.

Q: Instead of dumping out your unused bleach, check to see if anyone you know personally could use it. You can do this by mentioning it to friends and family in-person or by message, or you can mention it in a social media post. For example, bring the bleach with you when you visit a family member to ask them if they would like the rest of it. Ask places such as churches, local nursing homes, homeless shelters, or food kitchens if they would like donated bleach. You can do this by calling them, sending them an email, or dropping by to ask in person. If you have a favorite local nonprofit, ask them if they could use your extra bleach. Websites such as Craigslist will allow you to post a picture and description of your bleach so that others nearby can come pick it up if they need it. You can also check out websites like Freecycle.org which are dedicated to recycling unused items. Try posting on a Facebook classifieds page or group to see if anyone could use your extra bleach. Make it clear that the bleach is free and that the container is not completely full.
A: Ask friends, family members, or neighbors if they need bleach. Check to see if a local organization could use the bleach. Post the bleach on a classifieds page online for someone who needs it.

Article: . It's not something only hippies do! Anyone can recycle, and these days just about anything can be recycledfrom newspapers and plastic, to computers and old mobile (cell) phones. Encourage your school or workplace to recycle and to use recycled products. You probably already know that vehicle emissions are bad for the planet. What you may not know is how you can reduce your emissions: Start walking to nearby places. Use public transportation whenever possible. You can also do things like riding a bike to work instead of taking a car. If you need to use a car, consider purchasing one which uses a mix of electricity (a renewable energy source) and gas or only electricity. Reduce your harmful impact on the planet by reusing items and materials when you can, using green products, buying local food and items (supporting your local economy), and conserving resources such as water. This will help protect the planet and provide a healthy environment for all people who will live on after us. Help others to do the same by educating them about how they can reduce their impact on the planet. Remember: don't be preachy or self-righteous. You're doing this to help the planet, not so you can be smarter or better than your neighbour. Did you know that there will probably be a major water crisis in our lifetimes? The problem is that we consume and use water faster than we can clean old and new water. Help alleviate this problem by taking shorter showers, being careful when washing dishes, not leaving the water running when you brush your teeth, and generally paying attention to how you use water. Another thing to avoid is watering your lawn in the summer. Collect and use gray water for this purpose, as using clean drinking water to water grass is very wasteful. All life should be appreciated if humanity is to step forward in our pursuit for a better society. Spend time supporting animal rights, volunteer at your local shelter, or donate to an organization for animal welfare. Keep in mind that most animal suffering happens to farm animals, not pets. Most people forget this, since they can't see the animals they eat. Consider going vegetarian - it's healthier, helps the environment, reduces animal suffering and might actually be cheaper! If you can't imagine being vegetarian, eating less meat also works. Remember, it doesn't have to be an all-or-nothing decision. However, do your research before donating to organizations such as the Humane Society of the United States (HSUS for short), PETA, or other big-name corporations; sometimes a large percentage of the money will not go to the animals. A great site for comparing charities is http://www.animalcharityevaluators.org/ Don't buy animal food for donations. Donating your money directly to the shelter is much better, because the shelter can get food cheaper in bulk and it's hard to plan for donated goods. Fostering an animal for a short period of time is another great way to show your support of animals, and it costs little to no money to do!
Question: What is a summary of what this article is about?
Recycle Stop driving everywhere! Reduce your impact on the planet. Minimize your water usage. Support animal welfare.

Article: Whether you are trusting your baggage in the hands of an airline, or plan on wearing your grandma's antique necklace, lost or stolen items can happen on any vacation. If something is irreplaceable, don't risk the chance you will have to replace it. Fake jewelry. Although you should avoid looking too flashy on vacation, if you want pieces to match your outfit, it is a good idea to take some of your cheap or fake jewelry. If you are staying in a hotel, they will likely provide any needed toiletries like shampoo and soap. Leaving these items at home can save space but also eliminate any potential messy spills. If you have a special shampoo or conditioner you use, your destination likely has stores that sell it! You can buy it there and have one less thing in your bag. If you love to spend your vacation reading, bringing along some books can be a must. However, if you have an e-reader, this would be the time to bust it out. Books are heavy and take up a lot of room. If possible, leave them home! Ditch the guidebooks. These take up room and can also be outdated. If your road map is from even 9 months ago, there is a good chance things have changed. Download up to date guidebooks on your devices or simply get one at your destination. Will you really need your new portable water filter in Hawaii? With smartphones and tablets being so versatile, try to only take what you will absolutely need. This not only eliminates the risk of losing a valuable piece of electronics but will also lighten your load! Keep it basic. Leave the electric toothbrush at home and most hotels you stay at will have a hair dryer.
Question: What is a summary of what this article is about?
Leave your valuables home. Ditch the toiletries. Leave bulky books behind. Leave home unnecessary gadgets.