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In an isotonic contraction, the muscle changes in length while maintaining a constant tension. This allows for movement to occur, such as bending the elbow or lifting a weight.
column
The average chess game length in moves is around 40 moves.
Undercurrents are formed when water moves in a different direction or at a different speed within a body of water, such as an ocean or river, compared to the overall flow of that water body. This can be due to a variety of factors, including changes in density, temperature, salinity, or topography. Undercurrents can flow in a different direction from surface currents and can occur at different depths within the water column.
When velocity changes, that means that the object either moves faster, or moves slower, or moves in a different direction. Any of these changes is called "acceleration". A force is necessary to cause it.