If you are taking a blood pressure and the first pulse you here is at the number 123 and the last pulse you hear is at 85, how would you correctly report that person's blood pressure? (Don't
forget units)

Option (A)

Explanation:

A ball bearing is a device which is use to reduce the friction.

The outer rim of the bearing is fixed with the part of machine and inner rim is fitted into shafts. Now the shafts rotates and only the small spheres in the bearing will rotate. The friction can be further reduced by apply the oil or grease to the bearing.