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.
I am an ultrasound technologist. I would NEVER call it at 12 weeks!!! At this stage the boy and girl parts can look the same! So beware if you are being told this early! It is best to wait until your 18 to 20 week ultrasound to find out the sex of the baby. I think finding out the sex is cheating anyway!