Q: If you’re taking gas (like helium) from a tank, place the lip of the balloon tightly over the nozzle and fill it up. Or, if you want to measure air, just blow up the balloon using your mouth. Tie the end of the balloon in a tight knot when you’re done. Wrap a cloth tape measure around the center of the balloon to check its circumference. To get the radius of your inflated balloon, place a ruler on each side of the center of the balloon, measure the distance between them, and divide it in half. For instance, you place your balloon between two rulers and find that the distance is 10 centimetres (3.9 in). Divide this in half to get the radius, 5 centimetres (2.0 in). Plug in your measurements into the basic formula for the volume (V) of a sphere, V = 43πr3{\displaystyle {\frac {4}{3}}\pi r^{3}}. Plug the radius into the formula to get your sum. For instance,: V = 43π53{\displaystyle {\frac {4}{3}}\pi 5^{3}}, or about 523.33 cm3{\displaystyle ^{3}} or 206.04 in3{\displaystyle ^{3}}. Place the lip of a balloon over a faucet and carefully run water into it. Stop when the balloon is the same size as the balloon filled with gas. If you accidentally put too much water in, carefully pour some out.  It will be difficult to get the balloons to exactly the same size. To be more exact, wrap a cloth tape measure around the center of the water balloon to check its circumference. Adjust until it's the same as the gas-filled balloon's. Have someone help you measure the circumference of the water balloon while you hold it. Empty the balloon into a large measuring cup, beaker, or something else that can measure volume. Record the amount of water that was in the balloon. The volume of water will equal the volume of gas in the other balloon. If your water-filled balloon is the same size as the gas-filled balloon that you determined (via V = 43πr3{\displaystyle {\frac {4}{3}}\pi r^{3}}) had a volume of 523.33 cm3{\displaystyle ^{3}}, then you should measure about 523 milliliters (18  fl oz) of water poured out of it (1 ml = 1 cm3{\displaystyle ^{3}}).
A: Inflate a balloon with the gas you want to measure. Measure the balloon's circumference and radius. Use the volume of a sphere formula. Fill up another balloon with water to compare your results. Pour the water out and measure it.

Q: Use 3⁄4 in (1.9 cm) plywood to make your yo-yo. Cut out the 2 discs with a drill fitted with a hole saw with a 1⁄4 in (0.64 cm) pilot bit. If possible, avoid cutting out areas of wood with knots.  If you don’t have a hole saw bit, trace 2 1⁄2 in (6.4 cm) circles on the plywood, then use a jigsaw to cut them out. Picture each disc as a clock, and draw lines from 12 o’clock to 6 o’clock and from 9 o’clock to 3 o’clock. Then, for each disc, drill a 1⁄4 in (0.64 cm) hole at the center, or the point where the lines intersect. Wear protective goggles and use caution when working with saws and other power tools. If necessary, ask an adult to help you cut the discs. A store-bought yo-yo string has a loop at one end; slide that end onto the spacer. If you’re making your own string, cut a strand of cotton yarn equal to the length between your belly button and the floor. Then tie one end loosely to the spacer, and make a slip knot at the other end. If you’d like, make designs on the sides of your yo-yo with felt-tip pens or paint. For instance, try making spirals or concentric circles in various colors. Alternatively, if you stained or oiled the surface, you could just leave the finish as is. You could also decorate the sides with cutouts as you would with a bottle cap yo-yo. However, you’d need to punch a hole in the cutouts and include them under the bolt head and locking nut. Unscrew the nut and take the yo-yo apart, stick a cutout over the outside of each disc with double-sided tape, then put the yo-yo back together.
A: Cut a pair of 2 1⁄2 in (6.4 cm) wide plywood discs using a hole saw. Attach cotton yarn or a store-bought yo-yo string to the spacer. Decorate your yo-yo, if desired.

Q: See if there is any physician support available in your area for billing advice and and support - there are most often local resources to help physicians with this. Also, billing is one task that you do not want to delegate to office staff. Once you have mastered it, it takes very little time, and most EMR (electronic medical record) systems have the billing process embedded within the software itself making it quick and simple. You know your patients best, and as such you are the one who can bill most appropriately and most comprehensively for the services you have provided. It is important to become aware of what is and is not covered for patients under a pre-paid healthcare plan, and how to go about invoicing patients for services that are not covered (or invoicing third parties in cases where that applies). Take your time to become familiar with how the billing process applies to patients and be upfront about any costs that will come out of the patient's pocket. Clear communication and disclosure of costs is important. You will want to know how much money to set aside, when tax payments are due (for example, you may pay taxes quarterly), and the differences in tax filing for a business owner as opposed to an employee of a company. You will have many things that you can write-off as a business owner, so you will want to keep receipts related to your business in a special folder. It is also advisable to use a separate bank account and credit card for all business income and expenses. It is important to consider your long-term financial goals, and to appropriately plan for retirement with a goal age of when you will close your practice, and an idea of the money you will need to sustain your lifestyle. Planning your overall financial goals will help to keep you on track as you begin your own medical practice.
A:
Understand the billing process. Establish a process for informing patients of costs of services. Speak to an accountant regarding taxes. Consult with a financial advisor to put a long-term plan into place.