Velocity is a speed and its direction.
-- "30 miles per hour" is a speed
-- "30 miles per hour north" is a velocity
-- "30 mph north" and "30 mph east" are equal speeds but different velocities.
When a direction is specified, it is called velocity. When the direction is not specified, it is called a speed. (That's the difference between a vector and a scalar.)
Velocity indicates direction in addition to speed.
Acceleration is the rate of change of velocity.
Velocity is a vector measurement, it has both a speed quantity, but also includes direction. Speed is a scalar measurement, it only concerns with the how fast the object is moving, not its direction
velocity is speed with direction; velocity is a vector and speed is a scalar
Speed has no direction, velocity does.
Velocity indicates direction in addition to speed.
Acceleration is the rate of change of velocity.
Velocity is a vector measurement, it has both a speed quantity, but also includes direction. Speed is a scalar measurement, it only concerns with the how fast the object is moving, not its direction
I would think direction since velocity is a vector. Could also be speed. Speed is just a rate, velocity has speed and a direction. Short answer: direction with a speed caveat to account for the ambiguity in the question.
velocity is speed with direction; velocity is a vector and speed is a scalar
Speed in a given direction is velocity.
Velocity and speed are not synonyms.
Speed has no direction, velocity does.
SPEED has the speed only; while VELOCITY has the direction and the speed.
Instantaneous speed is the magnitude of the velocity. Velocity also states the [direction] of the speed.
Seismic wave velocity is mostly dependent on the material they travel through (things like magnitude do not affect wave velocity). As the earth is relatively uniform, there is virtually no deviation in earthquake 'speed'. (Wave velocity will differ depending on phase, depth, etc. - but that's different.)
Speed in a given direction is called velocity.