A mover is pulling a 1000 kg refrigerator with the help of…

 A mover is pulling a 1000 kg refrigerator with the help of a crank attached to his moving truck.  The data table below shows the pulling force versus time required to move the refrigerator, which is initially at rest.  Assuming that gravitational acceleration is , calculate the coefficient of static friction (

A technologist acquires an x-ray of the pelvis using 100 kil…

A technologist acquires an x-ray of the pelvis using 100 kilovoltage peak (kVp), 10 milliampere-seconds (mAs), 40 inches source-to-image distance (SID), and no grid. The exposure level is good, but the contrast is too low. If the exam is repeated using a 16:1 grid, what new technique should be employed?