how to measure air pressure in a basketball

On the wooden surface, ask one volunteer to hold the tape measure and ask two other volunteers to stand on each side of tape measure. We conducted our experiment inside, using the … Conventional wisdom is that a … The classic mercury barometer is designed as a glass tube about 3 feet high with one end open and the other end sealed. Air pressure is the weight of air molecules pressing down on the Earth. Air pressure gauges can be found online or in stores, but as we mentioned above they are optional and not necessary to inflate your basketball. The original instrument had mercury in the small basin, with an upside down glass tube placed in the mercury. A given force can have a significantly different effect depending on the area over which the force is exerted, as shown in Figure 1. Three Another simple test is to drop the ball from shoulder height. The basic principle is that when more air is pushed into the ball, the air pressure increases because the air is being squished, trying to fit in a minimal space. The pressure loss across a strainer or filter can be calculated using the system's flow rate and the Cv factor for that strainer or filter. The first mercurial barometer, invented in 1643, consisted of an overturned glass tube containing mercury. That pressure is called atmospheric pressure, or air pressure.It is the force exerted on a surface by the air above it as gravity pulls it to Earth. average air pressure at sea level is 1.03 kilograms per square centimeter (kg/cm2) or 14.7 pounds per square inch (psi); Get your basketball and measure the air pressure inside of it using the pressure gauge. Change pressure accordingly to what pressures you want to measure. When the basketball reads the correct pressure, measure one meter from the floor because this will be the height that you drop the ball from. You will use an air pump, a basketball, and an air pressure gauge to test if changing the air pressure will change the bounciness of the ball. For the initial trial, the ball will need to have a pressure of 4 pounds per square inch. This is also a relatively easy process and involves using the compressed air inside the canister to inflate your basketball. Change pressure accordingly to what pressures you want to measure. The magnitude of the pressure force is equal to the pressure (force/area) times the surface area, and the direction is perpendicular to the surface. If it has high air pressure, it keeps the ball from bending when it slams against the court floor. The large majority of air pressure gauges are analog, but there are newer digital gauges too. Measuring air pressure on island of Hawaii. Handy tool to insure the pressure is just right. The best way to measure the soccer ball pressure is to use a air pressure gauge. NBA rules dictate that basketballs should be inflated to between 7.5 and 8.5 pounds per square inch. The U tube is filled with water and the height difference is measured. Atm (Atmospheric Pressure) Conversion: An atmosphere (atm) equals to the air pressure at the sea level at a temperature of 15 Celsius. 2. The next hack involves using an air compressor to blow up your basketball. To figure out the amount of air in a basketball, you have to measure the air pressure. The force of air pressure against the card is stronger than the force of gravity on the water. For example, a 1 " strainer with a Cv factor of 8 will have a 4 psi pressure loss in a system with a 16 gpm flow rate: (16 ÷ 8) 2 = 4. Once the ball is fully filled up with air, press the plug back into the hole to stop the air from escaping your ball. You'll need a pump or compressor to fill football, basketball etc. Insert the plug and the let the ball sit for another day. The most frequently used units of pressure are pascal (Pa), kilopascal (kPa), megapascal (MPa), psi (pound per square inch), torr (mmHg), atm (atmospheric pressure) and bar. Among them are pounds per square inch, millimeters of mercury, atmospheres, and pascals. The SI unit for pressure is the pascal, where. These factors will determine How many pounds per square inch (PSI) you can inflate a basketball before it fails. There are several types of barometric instruments that measure air pressure. This glass tube sits upside down in a container, called the reservoir, which also contains mercury. Check pressure then release to get it to where you want it. A quick way to check if your ball has the proper air pressure is by taking this simple test. Hang the measuring tape on a wall next to an open area where a ball can be bounced. At the surface of a gas, the pressure force acts perpendicular to the surface. P = F A P = F A. Read the pressure level on the gauge of your hand pump. In order to determine the internal pressure of the ball, the volume of air, moles of air, and temperature and humidity were measured. If it bounces up back to the height of your hips, then your ball probably has the … Spalding makes the game balls for the NBA and uses a rubber bladder wrapped in fiber with a leather outer casing (this is the part you see), and has a 29.5 in circumference. Among them are pounds per square inch, millimeters of mercury, atmospheres, and pascals. Differential pressure is a measure of resistance to air flow across the filter bags. The gauge pressure is what we measure above the normal atmospheric pressure we experience all the time, and never notice. The recommended air pressure in a basketball is between 7 and 9 pounds per square inch (psi). According to NBA rules, the pressure inside a basketball must be between 7.5 and 8.5 lbs. Air has weight. The pressure that must be used is the total pressure. The result might be 0.1 gram or so, depending on the size of the can and how tightly packed it was. 1 Pa= 1N/m2 1 Pa = 1 N/m 2. A: Great question. As air pressure goes up, the level of mercury rises inside the tube. The range of all masses was between 54.66 and 59.04 grams. In the United States, we measure this force using psi, or pounds per square inch. In this experiment you will use a ball filled with air. When it is dropped, the air molecules will squish together and then spring apart. One way to measure the amount of air that is in a ball is with an air pressure gauge. Air Pressure Gauge (optional) If your air pump does not have an air pressure gauge, you may want to get a separate air pressure gauge to check the pressure in your ball. Fill up basketball to 9 PSI (62.06 kPa) using pressure gauge and air pump system 4. Tape measuring tape to wall/ ledge such that 0 m is at the ground and 4 m is at the holder position 5. Align ball at 1 m 6. Set camera to record and drop ball from height to measure and record rebound height 7. In the United States, we measure this force using psi, or pounds per square inch. When a basketball is inflated, it is being inserted with lots of air, similar to that of a balloon. The pressure should be about 3000 Pa above atmospheric pressure, which is a height difference of 0.3 m. The gas won't burn properly if the pressure IS wrong. The tube is filled with mercury. To avoid erroneous measurements, the pressure sensor is exposed via a static pressure head ( see image above ), a device designed in such a way that the dynamical effects of wind are minimised. In the figure, we have a gas (in red) that is confined in a box. Use the air gauge to check the air pressure of the basketball. If a ball has a low air pressure, it will form to the floor and not bounce back up, because it has less air molecules to bounce off the ground with. Set a chair next to the wall beside the measuring tape. Like in our previous step, here you’ll also need to find something that can fit in the small hole of the ball. Find out how with the next science project in science projects for kids: air pressure. When the basketball reads the correct pressure, measure one meter from the floor because this will be the height that you drop the ball from. These measurements allowed us to determine the volume of air that was pumped into the ball with each stroke of the pump. The highest pressure is at sea level where the density of the air molecules is the greatest. What happened? You can also use an air compressor pressure gauge, but make sure the gauge is sensitive enough to measure the pressure range you require for your ball. If you weigh a vacuum-packed can of nuts (with most of the air removed) then open it so the air can rush in, you can weigh the air that went in. The air around you has weight, and it presses against everything it touches. The mercury level in the glass tube falls, creating a vacuum at the top. Pressure acts in all directions at a point inside a gas. Many balls are inflated to the average pressure of 8 pounds. Drop your basketball from the height of your shoulder and leave it to bounce. Atmospheric pressure is commonly measured with a barometer.In a barometer, a column of mercury in a glass tube rises or falls as the weight of the atmosphere changes. Conventional wisdom is that a basketball needs 8 psi to be properly inflated. Regulation pressure for NBA games is between 7.5 and 8.5 psi. In fact, the force of air pressure is so great that you can even use it to crush a can. Experimental Procedure: With the help of an adult, fill each basketball with the suggested pounds per inch (psi) and use the marker to label each basketball. One of the first barometers was developed in the 1600s. Regulating a basketball's air pressure ensures fair playing conditions throughout a league. When dropped from a height of 6 feet, a properly inflated basketball should bounce upward between 52 and 56 inches (http://www.bestsoccerbuys.com/balls-basketball. There are various measurements used for air pressure. The pressure of the air molecules changes as you move upward from sea level into the atmosphere. You can use this as a guide for your own basketball pressure. The number of moles of air While this experiment was conducted to only measure the effect of air pressure on the COR of a basketball at 1 m, it could be extended to include more heights, creating a more complete data set of the COR of a basketball under different conditions. A ball's internal air pressure determines the height of its bounce. The volume was calculated using the circumference of the ball at each pressure, accounting for thickness of the skin of the ball. We disassembled the pump to measure the inside diameter of the cylinder, d = 3.4 cm, and reassembled it to measure the length of its stroke, Δz = 38 cm. You can also use an air compressor pressure gauge, but make sure the gauge is sensitive enough to measure the pressure range you require for your ball. Compare your result with your target pressure level, and inflate or deflate your ball accordingly. Get your basketball and measure the air pressure inside of it using the pressure gauge. The most frequently used pressure units. Air pressure. Enlist the help of volunteer to help you mark how high the ball bounces. The pressure range that’s stated for a legal NFL football is 12.5 psi – 13.5 psi, but those pressures are gauge pressures. The ball used in a game should have high air pressure, which is explained through the law of physics. As air passes through the dust layer and the filter medium, it loses the dynamic or velocity component of pressure. Atmospheric pressure is about 14.7 psi. Pressure is defined as the force divided by the area perpendicular to the force over which the force is applied, or. pressure This manometer is used to measure the pressure in the supply of heating gas to a building. The pump we used to inflate the basketball was a common hand pump. As air pressure increased, the pressure would force more mercury in the tube. (The first barometer of this type was devised by Italian physicist and mathematician Evangelista Torricelli in 1643.) Sit your ball … A regulation basketball used in NBA play is inflated to an air pressure between 7.5 and 8.5 pounds of pressure per square inch. The baro… Regions of higher elevation have lower air pressures compared to those areas closer to sea level. It is recommended that you use one of these gauge to measure the exact amount of pressure in a ball after inflating and before use. An instrument that measures air pressure is called a barometer. There are various measurements used for air pressure. Compare your result with your target pressure level, and inflate or deflate your ball accordingly. Eventually, as dust builds up on the bags, there is greater resistance to air flow and the volumetric flow rate decreases. Start by using an air pump with a pressure gauge to check the air pressure of the basketball. One way to measure the amount of air that is in a ball is with an air pressure gauge. html). It should bounce to a height approximately even with your hips. The air pressure holds the card in place. Use an air compressor. Light also has weight, but very very little. Similarly, the pressure in still air within a building will be affected by the flow of air round the building or indeed by an air conditioning system.

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