Measuring tall items or buildings is possible for you to do, even if you don't have a ladder. But how? In this experiment you will be using shadow heights created by the sun to measure! You will ...
TOLANSKY has described 1 an elegant method for observing, with a microscope, features of the three-dimensional profiles of particles and other small objects. For a particle of known geometry, it is ...
Find a tall stick. That and one good eye are all the tools you’ll need. With the stick in hand, walk exactly 11 paces from the base of the tree and mark the spot by driving the stick into the ground.