Yes, all xrays travel at the speed of light.
8 minutes
velocity = distance travelled/time taken to travel that distance
Simly stated, velocity is speed in a defined direction. If you travel 5mph north, the speed is the same as if you travel 5mph east, but the velocity is different.
If you have no velocity, then you aren't moving.
No, X-rays do not travel at the speed of sound. X-rays are a form of electromagnetic radiation that travel at the speed of light, which is much faster than the speed of sound.
a grid is a device placed in front of the image receptor which only allows xrays to travel directly through from the tube and prevent xrays which have been "scattered" from passing through to the image. This gives a much clearer resulting image. Grids are generally only used on thicker body parts where scattered xrays are more of an issue
Travel velocity refers to the speed at which an object or entity is moving from one location to another. It is the rate of change of position with respect to time during a journey. It is commonly measured in units such as meters per second (m/s) or kilometers per hour (km/h).
Speed plus the direction of travel.
6kph
Assuming that you travel 882 feet in a straight line, the average velocity is 882.5 = 176.4 feet per second.
Speed and direction of travel are typically referred to as velocity. Velocity is a vector quantity that includes both the speed of an object and the direction in which it is moving.