Problem: Article: If you are replacing your hard drive, you will be reinstalling OS X. Since your files are stored on the hard drive you are removing, you will need to back up any files you want to transfer to the new drive. This will make the operating system reinstall as painless as possible. See this guide for detailed instructions on backing up your files. Remove the power adapter cable. You must power down the Mac before opening the panel, or you run the risk of shorting out your components. Note: You cannot remove the hard drive from any MacBook Pro with the Retina Display, as these use integrated flash memory as opposed to traditional hard drives. You will be accessing the back panel of the MacBook. Set it on a table or workbench that gives you easy access without having to bend over. These run along the edges of the bottom panel. The exact location of these screws varies by model, but there are always ten. You will need a Phillips screwdriver to remove them. There are usually two types of screws: Seven 3 mm Phillips Three 13.5 mm Phillips The 13" MacBook Pro may have slightly different screw configurations, but there will still be ten screws. Wedge your fingers into the gap between the vent and the lowercase and pry the panel up. You will release two clips securing the panel as you do so. This connector provides power to the logic board, and should be disconnected before continuing to prevent shorting out any components. It is black and located along the edge of the logic board, and is the largest connector attached. Make sure to pull the connector straight out so as not to damage the connection. If there is a tab connected to the battery connector, use it to pull it out of the socket. If there is no tab connected, you can use a spudger or cocktail pick to push the connector out.
Summary: Back up your files. Power down the MacBook. Flip the MacBook over on a work surface. Remove the ten screws securing the back panel. Lift the lower panel. Disconnect the battery connector.

Problem: Article: Drop a pinch of salt to the bottom of a 5 ounce or larger glass bottle. Next, add 3 drops of lavender essential oil and 3 drops of frankincense essential oil. The salt will help disperse the essential oils throughout the toner. If you don't have lavender or frankincense essential oils, you can use 6 drops of your favorite essential oils instead. Just make sure that they aren't oils that irritate your skin. With the salt and essential oils in the glass bottle, pour in 3 ounces (90 ml) of witch hazel and 1 ounce (30 ml) of rose water. Shake the bottle gently to mix all of the ingredients until they are thoroughly combined. The toner doesn't need to be stored in the refrigerator, but it can be very refreshing to chill it during warmer months. If you have sensitive skin, you have to be careful about applying new products to it. To make sure that the toner will work for your skin, test a small amount of it on a small patch of skin, such as behind your ear or along your jaw. Wait 24 to 48 hours to see if you have a reaction. If you don't, you can use the toner freely. After you've washed your face with your normal face wash, wet a cotton pad or ball with the toner. Gently run the cotton all over your face to apply the toner. Follow up with the rest of your usual skincare routine. If you prefer, you can store the toner in a spray bottle and spray on it on your face instead of using the cotton pads or balls.
Summary: Add the salt and oils to a glass bottle. Mix in the witch hazel and rose water. Test the toner on your skin to see how it reacts. Apply the toner to a cotton ball or pad and run it over the face.

Problem: Article: If you started with a clear bulb, you don't need to clean it out. If you used a bulb coated with white kaolin powder, however, you'll want to clean this powder out before using the bulb for anything. Kaolin is considered a safe substance, but you should still avoid ingesting it or getting it in your eyes. Keep your goggles and gloves on. Stuff enough paper towel into the bulb to fill most of it, leaving a long enough "tail" sticking out from the bottom for you to grab. Watch out for any sharp edges or sharp bits of broken glass. Using the tail of the paper towel, twist it around the interior of the bulb, wiping away the powder in the process. Dry paper towel will usually work well enough, but if you have difficulty cleaning the bulb with dry paper towels, consider moistening the towel slightly and trying again. If some of the kaolin will not come out, fill the bulb one-quarter to half full with salt. You'll use the abrasiveness of the salt to help scrub the corners and angles of the bulb. Carefully cover the bottom of the bulb and give the entire thing a good shake. The salt should scrub away most of the remaining traces of kaolin. Place your gloved thumb over the bottom of the bulb to prevent salt from flying everywhere. You could also hold a paper towel over the bottom to accomplish the same goal. Dump out the salt when done. Dispose of this salt; do not reuse it. If there is any salt or kaolin inside the bulb, use your paper towels to clean it out. The material inside the bulb should be loose enough at this point for the paper towel to catch. Once you are finished with this step, the bulb is completely open, clean, and ready to use for whatever project you have in mind.
Summary: Determine if this is necessary. Insert paper towels into the bulb. Scrub away any powder. Fill the bulb with salt. Shake the bulb. Switch back to the paper towels.

Problem: Article: If you want to make a bridge that can sustain large amounts of weight, you will need to use the best materials. As stated above, epoxy is the strongest bonding agent you can use. Also, you want to make sure you have plenty of pasta on-hand to make the necessary reinforcements to your bridge. Consider the benefits and disadvantages of various types of pasta.Rounded spaghetti noodles may be better for some parts of your bridge while flattened noodles, like linguine, may be better for other parts. The purpose of building a spaghetti bridge is to apply the theoretical principles of engineering to a real-life construction project. As such, how you design the bridge deeply impacts the overall strength of the bridge. Some tips for building a stronger bridge include: Use triangular rather than rectangular trusses. Build the roadbed with multiple layers of pasta. You should leave the middle layer of your pasta roadbed unglued. Some flexibility in the pasta helps to redistribute weight across your bridge. The longer the gap a bridge has to span, the harder it will be to redistribute the weight from one area across the entire bridge. So, if it is up to you, making a shorter bridge will help your bridge sustain more weight. There is a relationship between the weight and strength of your bridge. Adding more pasta to your bridge during construction, when properly built, should add strength, but also adds more weight. The heavier your bridge is, the more likely it is that it will collapse when extra weight is applied. So, make sure you account for the weight of your bridge when designing your bridge.
Summary:
Select the best building materials. Design a stronger bridge. Limit the space your bridge must cover. Strike a balance.