Advice 1: How to measure the height of the uterine fundus

The growth of the uterus is an important indicator of the proper course of pregnancy. To ensure that it grows at a normal pace either by ultrasound or manually. Up to 12 weeks of pregnancy, the uterus is small, and to determine its size only during gynecological examination and ultrasound. By the end of the first trimester, the uterus comes out of the womb, and it can be felt through the abdominal wall. Usually the doctor makes measurements at each visit, but if a pregnant woman has doubts about the accuracy of its measurements, it is possible to hold their own.
How to measure the height of the uterine fundus
You will need
  • The tape.
Instruction
1
Empty the bladder. This is necessary for accurate measurement of height of standing of bottom of uterus.
2
Lie down on the bed, straight legs.
3
Determine the location where the end of the uterus. To do this, place hands on the middle line of the abdomen in the area of the pubic bone. Gradually move your fingers up, trying to find a place where the more dense part of the stomach goes into mild. This will be the bottom of the uterus.
4
Take a tape measure and measure the resulting distance. Normal height of the bottom of the uterus corresponds to the obstetric period in weeks plus or minus 2 centimeters. And only towards the end of pregnancy, for a couple of weeks before the birth, the baby descends into the pelvis, and the height of the bottom of the uterus falls below a few centimeters.
5
Too large a discrepancy between the measurements and obstetric period may testify, or that the pregnancy is not installed correctly, or possible problems, for example, fetal growth retardation, oligohydramnios/polyhydramnios, etc. it is Recommended to monitor the dynamics of growth of the uterus and for your own peace to do an ultrasound to confirm that baby is developing normally.
Note
Sometimes too slow or too rapid growth of the uterus is different pregnant.

Advice 2: How to measure height of building by barometer

Measure the height of a building using a barometer — a non-trivial physical problem, showing how important it is for physics to think outside the usual categories. A barometer measures atmospheric pressure, and yet there are many ways to use this device to determine the height.
How to measure height of building by barometer
You will need
  • barometer;
  • — knowledge of physics;
  • — a little imagination and a sense of humor.
Instruction
1
It is known that atmospheric pressure depends on the height above sea level. Therefore, by measuring the air pressure at the base of the building, and then climbing up onto the roof and repeating the measurement, we can use the difference to deduce the height of the rise. The average rise twelve metres the atmospheric pressure decreases by 1 millimeter of mercury, or, equivalently, 133 PA. Thus, if the difference in readings at the foot and on the roof made 260-270 PA, the height of the building can be considered equal to 24 meters.
2
For this method we need not only a barometer but also a stopwatch. Dropping the barometer from the roof of the building, a stopwatch measure the time of his fall. According to the equation describing accelerated motion, the path traveled by a body in free fall, is equal to (g*t^2)/2, where g is the acceleration of gravity (9.8 m/s^2) and t is the fall time. Calculating by this formula, the distance that flew the barometer to fall to the ground, you will get the height of the building.
3
Tie the barometer to a long rope and lower him gradually from the roof of the building to the ground. Once the barometer touches the ground, the measurement is complete. It only remains to descend to the ground and any way to measure the length of the rope.
4
If you measure the length of the rope is complicated, a barometer can be used as a pendulum. Time oscillations of an ideal mathematical pendulum depends on its length and the gravitational acceleration: T = 2π*√(L/g) where T is the period of oscillation, L is the length of the pendulum and g is the acceleration of free fall. By measuring the period of oscillation of the barometer, attached to the rope, the length of which is equal to the height of the building, you will be able to calculate the height according to the formula: L = g*(T/2π)^2.
5
The shadows cast by objects proportional to the height of these items. Therefore, by measuring the height of the barometer and the length of the shadow that it casts on a Sunny day on a horizontal surface at a certain time of day, you will be able to share them with each other, getting the ratio. By measuring the length of the shadow cast by the building at the same time of day and multiplying it by the calculated ratio, you determine the height of the building.
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