Portions of the turbine also volitized; idling at eight thousand rpm, it became unstable. Later tests would put the rim through check-out tests to as high as 1.59 gee, but normal operation had been fixed at two rpm. The out-of-balance fan, turning at close to 35,000 rpm, flew to pieces and the air cushion vanished. Code Three Rick Raphael Meanwhile, they kept up a jabber that sounded like a 33-1/3 rpm record being played 78 rpm. Brknk's Bounty Gerald Allan Sohl British Dictionary definitions for rpm Expand
The bottom number, called the diastolic pressure, is the measurement as the heart relaxes between beats. Normal blood pressure is a systolic pressure of less than 120 millimeters of mercury (mm Hg) and a diastolic pressure of less than 80 mm Hg, or 120/80 mm Hg, according to the American Heart Association (AHA).Having a blood pressure greater than 140/90 mm Hg is considered high blood pressure or hypertension.A blood pressure level between normal and hypertension, is called prehypertension, meaning it is higher than normal, but not high enough to be considered hypertension.aving a blood pressure greater than 140/90 mm Hg is considered high blood pressure or hypertension. A blood pressure level between normal and hypertension, is called prehypertension, meaning it is higher than normal, but not high enough to be considered hypertension.
Your blood pressure numbers show how hard your blood is pushing against the sides of your blood vessels (arteries) as it travels round your body. When you have your blood pressure measured it is written like this: 120/80mmHg, which is said ' 120 over 80' . The first number is the systolic pressure, when your heart pushes blood around your body. The second is the diastolic pressure, when your heart relaxes. Blood pressure usually ranges between 90 to 250 for the top or maximum number (systolic) and 60 to 140 for the bottom or minimum number (diastolic). A healthy blood pressure is 120/80 or less, but the lower you can get it, the better. To maintain a healthy level and reduce your risk of stroke and heart disease, check out our lifestyle tips. 140/90mmHg is the level used to diagnose high blood pressure for everyone, whatever your age.