ocean floor. multibeam sonar sends out a fan-shaped coverage of sound in many directions and determines depth by calculating the amount of time it takes for the sound waves to return. scientists are then able to create a map of the sea floor. picture of multibeam sonar from: toothed whales, such as...
, oil engines, electric motors, pumps, electric pumping sets, capacitors of all types and pipes of all types % % all equipments for electronic communication by wireless or by wire including private branch exchange (p.b.x) and electronic private automatic branch exchange (e.p.a.b.x) % % all kinds of bricks...
is the world's number one health riski, about one third of food for human consumption is lost or wasted globally each yearii. in addition, when food is wasted all of the resources that were put into its production are lost. not only are these increasingly scarce resources, such as water and fuel, lost...