In one sentence, describe what the following article is about: Set a bathroom scale outside and make sure it’s zeroed out so you get an accurate reading. Put your empty propane tank on top of the scale and read the weight. Compare the weight of the tank to the tare weight to see if there is any difference.  For example, if your tank has a tare weight of 20 pounds (9.1 kg) and it weighs 22 pounds (10.0 kg) on the scale, then it still has 2 pounds (0.91 kg) of propane left. Make sure the scale and tank are on a flat surface so they don’t tip over while you’re filling. Choose a connector hose that has propane fittings on the end and is long enough to reach between your propane tank and the larger supply tank. Screw the connector hose counterclockwise onto the port attached to the valve on your empty tank until it’s hand-tight. Then use a wrench to tighten the connection so it doesn’t leak.  Connect the other end of the hose to the port on the supply tank you’re transferring propane from.  You can buy connector hoses and propane fittings from your local hardware store. If you don’t have a propane supply tank on your property, you may need to go to a propane dealer where they can fill your tank for you. If you’re filling a 1 pound (0.45 kg) propane tank, you can buy a connector that attaches to the larger tank. Turn the valve on the empty tank counterclockwise to open it and let propane inside. Then, open the valve on the tank you’re transferring propane from by turning it counterclockwise. You will start to hear the propane hissing through the connector hose once both of the tanks are open. If your tanks are the same temperature, then the propane won’t transfer between them easily. Turn on a garden hose so a weak stream comes out of the nozzle. Set the nozzle on top of the tank so the water runs down the sides and cools the tank while it’s filling up. If you’re filling an empty 1 pound (0.45 kg) propane tank, then you can put it inside a freezer for 30 minutes for you fill it to make it colder. Since propane expands when it’s hot, you can only fill it up to 80% full so it doesn’t burst when it gets hot. Calculate 80% of the tank’s capacity and add the tare weight to find how much your tank will weigh when it’s full. When the tank reaches the weight you calculated, rotate the valves on both tanks clockwise to close them. For example, if your tank can hold 20 pounds (9.1 kg) of propane and the tare weight is 20 pounds (9.1 kg), stop filling the tank once the scale reads 35–36 pounds (16–16 kg). The bleeder valve is a screw underneath the main valve and helps remove any excess propane from your tank. Put on gloves to protect yourself from any liquid propane if there is any. Turn the screw counterclockwise with a screwdriver to open the bleeder valve. If liquid squirts out of the valve, leave it open until there’s only vapor. If gas or vapor comes out of the valve, turn the screw clockwise to seal it again.
Summary: Set the propane tank on a scale to weigh it. Connect the empty propane tank to a larger supply tank with a connector hose. Open the valves on each of the propane tanks. Cool the tank you’re filling with cold water to help the propane transfer. Close the tank valves when the tank is 80% full. Open the bleeder valve on the tank you filled to make sure it isn’t too full.

Problem: Article: To begin, stand up straight with your arms extended by your ears. Then, sit back, like you're going to lean back in a chair. As you do this, swing your arms down and back behind you. Your knees should be directly over your feet, not positioned in front of your feet, or you won't generate enough momentum to land on your hands. Swing your arms forward until they reach over your head. Follow your hands with your eyes. At the same time, push through your toes to gain momentum and launch your body backward. Keep your legs together and your core muscles tight. Arching your back too much is called undercutting and will not only make your back handspring look less pretty, but it could also injure your back. As you fall, let your legs continue to drive you upward and backward. Point your toes and extend through your ankles. Make sure you keep your head back between your arms as they approach the floor. Reach for the floor as you fall backwards and make sure to keep your body arched. Keep your arms straight so you don't hit your head on the floor. Your fingers should be pointing up and away from your face with your palms flat on the ground. Let the momentum of your legs, with your lower body still following, carry you over. When your hands are planted on the floor, use the pads of your hands and fingers, your arms, and your shoulders for support. Don't put all of your weight and pressure on your hands. Snap your legs over your head and around to the floor, with  your feet together and your toes pointed. Don't lock your knees, but keep your legs almost straight. Keep your shoulders in line with your hands. Continue by swinging your legs and feet over and snapping them down firmly toward the floor. Keep your upper body straight as your toes approach the floor. To finish the back handspring, land with your legs slightly bent and pop up to release your momentum. Bring your arms straight in front of you and then raise them up over your head. Don't be discouraged if you don't get it right immediately. Work with a spotter until you feel comfortable enough to do it on your own. With enough hard work, you'll have a neat and smoothly-executed back handspring in no time.
Summary:
Bend your hips forward and swing your arms down. Push through your toes and lift your arms up. Continue to fall backwards without arching your back too much. Plant your hands on the floor. Swing your legs over your head. Plant your feet on the floor. Pop up.