In the study of animal locomotion, Denny's paradox refers to the apparent impossibility of surface-dwelling animals such as the water strider generating enough propulsive force to move. In Biomechanics, animal locomotion is the study of how Animals move. The family Gerridae contains insects commonly known as water striders, water bugs, magic bugs, pond skaters, skaters, skimmers It is named for Mark Denny. Mark W Denny (born 1951 is a professor of biology at Stanford University.
If capillary waves are assumed to generate the momentum transfer to the water, the animal's legs must move faster than the phase speed cm of the waves, given by
where g is the acceleration due to gravity, σ is the strength of surface tension, and ρ the density of water. A capillary wave is a Wave travelling along the interface between two fluids whose dynamics are dominated by the effects of Surface tension. The phase velocity (or phase speed) of a Wave is the rate at which the phase of the wave propagates in space Standard gravity, usually denoted by g 0 or g n is the nominal acceleration due to gravity at the Earth's surface at sea level For the work of fiction see Surface Tension (short story. Surface tension is a property of the surface of a Liquid that causes it to The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different Water is a common Chemical substance that is essential for the survival of all known forms of Life. For standard conditions, this works out to be about 0. 23 m/s.
Infant water striders' legs move at speeds much less than this and, according to this physical picture, cannot move. For a resolution of Denny's paradox, see water strider. The family Gerridae contains insects commonly known as water striders, water bugs, magic bugs, pond skaters, skaters, skimmers