Write a function calc_sphere that will receive the radius r of a sphere. it will calculate and return the volume of the sphere if the function call expects two output arguments, the function will also return the surface area of the sphere.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object