To measure the hole depth (well, break, etc.), take a usual stone and dump it down, at the same time note time of its falling. Calculate the way done by a stone by a formula is and there will be required depth. To learn well depth, measure diameter of a collar and quantity of its turns before achievement of water. Learn depth of a reservoir by means of the manometer. Lower it on depth and take readings, then make calculation.
It is required to you
- stop watch, ruler, manometer, sonic depth finder.
Instruction
1. Determination of depth on the sound which is distributed when falling you telavozmit rather heavy subject to reduce influence of forces of resistance of air (the medium-sized fireplace will approach). Dump it down and wait until it falls, being guided on a sound. By means of a stop watch note falling time in seconds. To learn depth at which there was a subject square the measured time, increase it by value of acceleration of gravity (9.81) and divide into 2 (H=9.81 • t²/2). Acoustic speed in air in this case can be neglected.
2. Determination of depth you kolodtsavozmit cargo (bucket) and attach it to a cable on which it is lowered behind water. By means of a ruler measure diameter of a collar and transfer it to meters. Lower a bucket in water and having made sure that it was gathered and left water, you will count the quantity of turns of a collar necessary to extend a bucket from a well. To determine well depth, increase diameter of a collar by number 3.14 and the received quantity of turns (H=n•D•3.14).
3. Determination of depth of a vodoyemachtoba to determine depth at which there is a body in the thickness of water attach to it the manometer and measure pressure of a water column at this depth in pascals. Then divide the received value of pressure into number 9.81 (acceleration of gravity) and 1000 (water density). In a case with sea water take value 1030. Depth at which there is a body expressed in meters will be result.
4. For determination of depth of a reservoir use the sonic depth finder. Lower its sensor in water and turn on the device. On the screen of the sonic depth finder the bottom relief with exact determination of depths will appear.