Experiment 24 system volume determination

the determination of the volume of 24 systemsprinciple According to the Archimedes principle, the root system is immersed in water, and the volume of water it drains is the volume of the root system itself. Using a simple volume meter, the volume of the root system can be measured by using the water level replacement method.。Instrumenta
funnel
piperubber pipe iron frame operation step 1. Instrument devicewith a rubber tube connected as a volume meter of the large funnel and pipe pipe, and then fixed to the iron frame, so that the pipe pipe into a tilt angle, the smaller the angle, the higher the sensitivity of the instrument. The entire unit is shown in Figure 4.
。 2. Measurement method (1) to test the root of the crop carefully dug out, with water gently rinsed until the root system without sand, should try to keep the root system intact, do not break the young root, with absorbent paper carefully absorb dry water.(2) add water into the volume meter, the amount of water to be able to immerse the root system as the degree, adjust the tick pipe position, so that the water surface near one end of the rubber pipe, write down the reading, is A
1
.(3) dips the root system after absorbing water into the volume meter, at which point the liquid surface in the pipet rises and the reading is noted as
2
.(4) to remove the root system, at which point the water surface in the pipe will drop below A
1
, add water into the volume meter, so that the water surface back to A
1
.(5) water is added to the volume of the pipe pipe to increase the surface of the water from A
1
to A
2
, at which point the amount of water added represents the volume of the root system under test.。