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Spring, also known as springtime, is one of the four temperate seasons, succeeding winter and preceding summer.There are various technical definitions of spring, but local usage of the term varies according to local climate, cultures and customs. When it is spring in the Northern Hemisphere, it is autumn in the Southern Hemisphere and vice versa. At the spring (or vernal) equinox, days and ...A spring is an elastic object that stores mechanical energy.Springs are typically made of spring steel.There are many spring designs. In everyday use, the term often refers to coil springs.. When a conventional spring, without stiffness variability features, is compressed or stretched from its resting position, it exerts an opposing force approximately proportional to its change in length ...
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