It is used during daylight hours. The balloon is filled to such degree that its ascent rate is known. By measuring the time period between the start of the balloon and the moment it hides in the cloud can be determined the height of the cloud base.
imbrication lines (imâ³bro brÃ´Â´ika shÉn) , lÄ«nz.n pl. 1 the seams which are formed by overlapping layers of tissue in order to close a surgical. wound. 2 slight mesiodistal ridges in the cervical third of a. tooth
A two-dimensional contour graph of the three-dimensional surface in the above picture. A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. It is a plane section of the three-dimensional graph of the function f(x, y) parallel to the x, y plane.