Pump and Fan Efficiency - Overall pump and fan efficiency is the ratio power actually gained by the fluid to the shaft power supplied. Pumping Water - Costs - The cost of pumping water. Hydraulic Pumps and Motor Sizing - Motor size versus flow rate, shaft torque, shaft power and hydraulic power.
Finding out your baby's sex. The second scan is carried out at around 18-21 weeks, and its main purpose is to check for any structural abnormalities (anomalies) in the baby. If you want to find out the sex of your baby, you can usually do so during this scan. If you want to know your baby's sex, you should ask the sonographer (the person who carries out the scan) at the start of the scan, so they know that they need to check. You should be aware that it's not possible for the sonographer to be 100% certain about your baby's sex.
At around 18 to 20 weeks, you will have an ultrasound to check your babyâs development, identify any problems, and possibly even identify the sex of your baby. Itâs important to remember that it is not always possible to determine the sex of your baby at this stage and you wonât know for sure until your baby is born. To determine the sex of your baby, the ultrasound technician or obstetrician will look for the presence or absence of a penis on the ultrasound. Keep in mind that this method of determining the sex of your baby is not 100% accurate. A visual effect may create or obscure the image of a penis on an ultrasound.