1 The mechanical horsepower, also known as imperial horsepower, of exactly 550 foot-pounds per second is approximately equivalent to 745.7 watts. 2  The metric horsepower of 75 kgf-m per second is approximately equivalent to 735.5 watts or 98.6% of an imperial mechanical horsepower.
An ultrasound scan, also referred to as a sonogram, diagnostic sonography, and ultrasonography, is a device that uses high frequency sound waves to create an image of some part of the inside of the body, such as the stomach, liver, heart, tendons, muscles, joints and blood vessels.
The same concept goes for sonogram and ultrasound. Sonogram is a medical procedure, as suggested by its definition above, which uses ultrasound to create an image of what is inside the body, such as a fetus. Having said that, the person who is in charge of this procedure, is known as a sonographer. On the other hand, ultrasound refers to a sound energy whose frequency is beyond the audible range of humans (20 Hz - 20,000 Hz), and is used in the procedure of sonogram.