FIELD: physics.
SUBSTANCE: model for expanding planet Earth has a closed surface made with possibility of proportional expansion, for example an elastic sphere with a check valve filled with gas, dyed with magnetic ink, marked with polar coordinates and resting on a support, and a device for supplying gas. Figures of continents are made from flexible material which contains magnetic powder, are dyed with ink of different colours and are placed on the surface.
EFFECT: improved model.
9 dwg
