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or retardation of the effect, when the forces acting upon a body are changed, as if from velocity or internal friction; a temporary resistance to change from a condition previously invuced, observed in magnetism, thermoelectricity, etc., on reversal of polarity.

The aititude through which a heavy body must fall to acquire a velocity equal to that with which a ball is discharged from a piece.

At or during a given instant; as, instantaneous acceleration, velocity, etc. Instantaneous center of rotation (Kinematics), in a plane or in a plane figure which has motions both of translation and of rotation in the plane, is the point which for the instant is at rest. -- Instantaneous axis of rotation (Kinematics),…

A unit of force equal to the force which, acting for one second, will give a pound a velocity of one foot per second; -- proposed by J.D.Everett, an English physicist.

motion be uniform, or in the interval of time which it occupies in passing from any given velocity to the same velocity again, if its motion be variable; -- called also the efficiency of the machine. Mosley. Rankine. -- Modulus of a system of logarithms (Math.), a number by which all the Napierian logarithms must be m…

in a moving body, being always proportioned to the quantity of matter multiplied into the velocity; impetus.

An instrument for determining and recording the different phases, as the intensity, velocity, etc., of a muscular contraction.

An instrument for observing the clouds and their velocity.

us masses were discovered, apparently moving radially outward from the star at incredible velocity.

y equal distances in equal times; -- called also a paracentric. -- Paracentric motton or velocity, the motion or velocity of a revolving body, as a planet, by which it approaches to, or recedes from, the center, without reference to its motion in space, or to its motion as reckoned in any other direction.…

he rim of a wheel and actuated by one or more jets of water playing into the cups at high velocity.

line in another gear, with which the former works, that the two lines will have a common velocity as in rolling contact; it usually cuts the teeth at about the middle of their height, and, in a circular gear, is a circle concentric with the axis of the gear; the line, or circle, on which the pitch of teeth is measured…

A bent tube used to determine the velocity of running water, by placing the curved end under water, and observing the height to which the fluid rises in the tube; a kind of current meter.

acting on a pound avoirdupois for one second, causes it to acquire by the of that time a velocity of one foot per second. It is about equal to the weight of half an ounce, and is 13,825 dynes.

atter, in a body, its mass, as determined by its weight, or by its momentum under a given velocity. -- Quantity of motion (Mech.), in a body, the relative amount of its motion, as measured by its momentum, varying as the product of mass and velocity. -- Known quantities (Math.), quantities whose values are given. --…

The quality or state of being rapid; swiftness; celerity; velocity; as, the rapidity of growth or improvement.

d on the plane would remain at rest, or if in motion would roll or side down with uniform velocity; the angle at which the various kinds of earth will stand when abandoned to themselves.

An instrument for measuring the velocity of the blood current in the arteries.

An instrument, acting on the principle of Pitot's tube, for measuring the velocity of a fluid current, the speed of a ship, etc.

Drawbridge. -- Rolling circle of a paddle wheel, the circle described by the point whose velocity equals the velocity of the ship. J. Bourne. -- Rolling fire (Mil.), a discharge of firearms by soldiers in line, in quick succession, and in the order in which they stand. -- Rolling friction, that resistance to motion…