Q: In general, it’s best to wait until your son or daughter has developed a strong pincer grasp and can use the spoon relatively well. At that point, you can introduce the fork. Most children are ready by fifteen to eighteen months or so. To begin, select a fork made for young children, with rounded tips and a lighter weight. These are both safer and easier for a toddler to use successfully. Offer larger pieces of food that are fairly easy to pierce and hold with a fork: cubes of cheese work well, as do some kinds of cooked vegetables, meats, and pastas. Avoid foods that are too small, crumbly, or slippery. You don’t want to frustrate your child unnecessarily. In the beginning, you may need to take your child’s hand and demonstrate how to pierce and pick up a piece of food. Once your toddler is two or so, it’s fine to encourage fork-eating, but don’t worry if your child continues to prefer using his or her fingers. You can wait until the preschool years to start pushing harder for better table manners. Again, let your toddler know that you are impressed with his or her new skills.
A: Wait until your toddler is ready. Choose the right fork. Start with foods that are easy to pierce. Help your child use the fork. Encourage eating with the fork. Praise your child’s efforts.

Article: Facebook is, by a wide margin, the most popular social media site. They even allow for separate business pages. Add photos of your office and products. Make sure you keep your page updated with new information, and updates.  Keep your posts short, and use pictures whenever possible. People want things to look at, and you'll need to catch their eye as they scroll through their feed.  Be sure to patrol your page for spam and negative comments. LinkedIn is a business networking site, and is a little more professionally-oriented than Facebook. Make an account for your company, and encourage your employees to join. Put as much information as you can into your company's profile, which will help LinkedIn market you to other users. Post updates to what you are doing, and utilize hashtags to generate attention. Track trending topics as well, and utilize any that are similar to your business. To help generate followers, encourage your employees to follow and interact with your company account.  Make sure your handle reflects your business name or what you do. Matching your company website would be best, as it can help customers remember the relationship. Even something as simple as "#deal" or "#sale" (if you have one) for a hashtag can bring in new customers who may not have otherwise been looking for you. Like the others above, these sites provide a space for you and your customers to interact publically. When you create the page, you can control the content, and make sure it reflects your business in a positive light.  Look for sites that best demonstrate your business, and allow you to show off what makes you great, or unique. A photo-sharing site like Instagram or Pinterest is good for companies that produce items, like jewelry, clothing, or any product where a visual would be helpful. Learn about your customers and the kinds of social media they would use in relation to your company. For example, Foursquare and Yelp are good sites for service industries like restaurants, letting customers "check in" (telling their friends they are there) when they visit, and post reviews. Focus on a handful of platforms, rather than as many that you can find. There are many social media sites out there. Checking your various pages regularly can quickly take up too much of your time.  Link your social networks together whenever possible. Visitors to one site should be encouraged to go to another. Include your social network handles on all printed materials as well, encouraging people to go there. You don't want your page to only be advertisements, that will only turn people off. You want to humanize your audience instead of treating them only as customers. Use the page to tell people a little about your field and your interest in it. A good rule of thumb is a 5-3-2 ratio for posting. This breaks down to 5 posts for information related to your audience, 3 non-sales posts related to your audience, and 2 posts not related to your business. You may find interesting local events, or celebrate achievements among your employees.
Question: What is a summary of what this article is about?
Create a Facebook page.  Create an account on LinkedIn.  Create a Twitter account. Use additional social media networks. Promote yourself along with your business.

Q: It's easy to see the principles of enthalpy in action with a simple experiment. To make sure that the reaction in your experiment will take place without any foreign contamination, clean and sterilize the container that you plan to use. Scientists use special closed containers called calorimeters to measure enthalpy, but you can achieve reasonable results with any small glass jar or flask. Regardless of the container you use, fill it with clean, room-temperature tap water. You'll also want to conduct the reaction somewhere indoors with a cool temperature. For this experiment, you'll want a fairly small container. We'll be testing the enthalpy-altering effects of Alka-Seltzer on water, so the less water used, the more obvious the temperature change will be. Grab a thermometer and set it in the container so that the temperature-reading end sits below the water level. Take a temperature reading of the water — for our purposes, the temperature of the water will represent T1, the initial temperature of the reaction. Let's say that we measure the temperature of the water and find that it's exactly 10 degrees C. In a few steps, we'll use this sample temperature reading to demonstrate the principals of enthalpy. When you're ready to start the experiment, drop a single Alka-Seltzer tablet into the water. You should notice it immediately start to bubble and fizz. As the tablet dissolves in the water, it breaks down into the chemicals bicarbonate (HCO3-) and citric acid (which reacts in the form of hydrogen ions, H+). These chemicals react to form water and carbon dioxide gas in the reaction 3HCO3− + 3H+ → 3H2O + 3CO2. Monitor the reaction as it proceeds — the Alka-Seltzer tablet should gradually dissolve. As soon as the tablet finishes its reaction (or seems to have slowed to a crawl), measure the temperature again. The water should be slightly colder than before. If it's warmer, the experiment may have been affected by an outside force (like, for instance, if the room you're in is especially warm). For our example experiment, let's say that the temperature of the water is 8 degrees C after the tablet has finished fizzing. In an ideal experiment, when you add the Alka-Seltzer tablet to the water, it forms water and carbon dioxide gas (the latter of which can be observed as fizzing bubbles) and causes the temperature of the water to drop. From this information, we would expect the reaction to be endothermic — that is, one that absorbs energy from the surrounding environment. The dissolved liquid reactants need extra energy to make the jump to the gaseous product, so it takes energy in the form of heat from its surroundings (in this case, water). This makes the water's temperature fall. In our example experiment, the temperature of the water fell two degrees after adding the Alka-Seltzer. This is consistent with the sort of mildly endothermic reaction we'd expect.
A:
Grab a clean container and fill it with water. Insert a thermometer into the container. Add one Alka-Seltzer tablet to the container. Measure the temperature when the reaction finishes. Estimate the enthalpy of the reaction.