In one sentence, describe what the following article is about: With a few household items, it's easy to see the principles of buoyancy in action! In this simple experiment, we'll demonstrate that a submerged object experiences buoyancy because it displaces a volume of fluid equal to the volume of the object submerged. As we do this, we'll also demonstrate how to practically find an object's buoyancy force with this experiment. To begin, place a small open container, like a bowl or a cup, inside a larger container, like large a bowl or a bucket. Next, fill the small inner container with water. You want the water level to be at the very top of the container without spilling. Be careful here! If you spill any water, empty the larger container before trying again. For the purposes of this experiment, it's safe to assume that water has a standard density of 1000 kilograms/meter3. Unless you're using saltwater or a different liquid entirely, most types of water will have a density close enough to this reference value that any minor difference won't alter our results. If you have an eyedropper handy, this can be very helpful for precisely leveling off the water in the inner container. Next, find a small object that can fit inside the inner container and won't be damaged by water. Find this object's mass in kilograms (you may want to use a scale or balance which can give you grams and convert up to kilograms). Then, without letting your fingers get wet, slowly and steadily dip this into the water until it starts to float or you can just barely hold on to it, then let go. You should notice some of the water in the inner container spill over the edge into the outer container. For the purposes of our example, let's say that we're lowering a toy car with a mass of 0.05 kilograms into the inner container. We don't need to know the volume of this car to calculate its buoyancy, as we'll see in the next step. When you submerge an object in water, it displaces some of the water if it didn't, there wouldn't be any space for it to enter the water. When it pushes this water out of the way, the water pushes back, resulting in buoyancy. Take the water that spilled out of the inner container and pour it into a small glass measuring cup.The volume of water in the cup should be equal to volume of the submerged object. In other words, if your object floats, the volume of the water that spills over will be equal to the volume of the object submerged under the surface of the water. If your object sank, the volume of the water that spills over will be equal to the volume of the entire object. Since you know the density of water and you can measure the volume of the water that spilled into the measuring cup, you can find its mass. Simply convert its volume to meters3 (an online conversion tool, such as this one, can be helpful here) and multiply it by the density of water (1,000 kilograms/meters3). In our example, let' say that our toy car sunk into the inner container and displaced about two tablespoons (.00003 meters3). To find the mass of our water, we'd multiply this by its density: 1,000 kilograms/meters3 .00003 meters3 = 0.03 kilograms. Now that you know the mass of both the object you submerged in water and the mass of the water it displaced, compare them to see which is greater. If the mass of the object submerged in the inner container is greater than that of the displaced water, it should have sunk. On the other hand, if the mass of the displaced water is greater, the object should have floated. This is the principle of buoyancy in action for an object to be buoyant (float), it has to displace an amount of water with a mass greater than that of the object itself. Thus, objects with low masses but big volumes are the most buoyant types of objects. This property means hollow objects are especially buoyant. Think of a canoe it floats well because it's hollow in the inside, so it's able to displace a lot of water without having a very high mass. If canoes were solid, they wouldn't float very well at all. In our example, the car has a higher mass (0.05 kilograms) than the water it displaced (0.03 kilograms). This lines up with what we observed: the car sank.
Summary: Place a small bowl or cup inside a bigger one. Fill the inner container to the brim. Submerge a small object. Collect and measure the water that spills over. Calculate the weight of the spilled water. Compare the displaced water's mass to the object's mass.

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One-sentence summary -- Make sure your hot water supply is on. If the cold water runs OK, but the hot water doesn't, or runs slowly then trickles off, then you may have an airlock, which is when air in the pipes isn't being moved by the hot water, thereby blocking the pipe. Take a length of garden hose (about 1 foot) and some duct tape. Use the duct tape and hose to connect the cold water tap to the hot water tap. Open the hot water tap. Open the cold water tap for 3-5 seconds. Make sure that your airlock is fixed! Check the hot water at another tap. Repeat steps 5-8 two or three times. IF the hot water is working, switch off all taps and remove your hose. If not, call a plumber!

Problem: Article: The race starts at 5 am, so it's important to get there early. It's important to know the marathon route, as all streets are closed overnight and re-opened during certain hours throughout the day. Avoid thinking and concentrating on running like it's the only thing on your mind. There are lots of Pacific Ocean sights over Kalanianaole Highway and Diamond Head, so take a breath and enjoy the views. Take advantage of any water cups or sponges as you move along. Even if it's throwing the water on your hair or the back of your shirt, you will feel better and more energized. The marathon doubles up along Kalanianaole Highway, so cheer on encouragement to those on the other side of the road. There is a lot of Aloha spirit and even if it's cheering on a Japanese participant, everyone has fun.
Summary:
Arrive at Ala Moana Beach Park. Take in the views. Hydrate yourself at all times. Cheer on others.