PLEASE HURRY!! Which of the following lays out the first step in converting 0.000000624 to a scientific notation?
Count the number of positions to move the decimal place
Move the decimal after the number 4
Count the number of zeroes preceding the number 6
Move the decimal after the number 6

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?