How is velocity different than speed?
-velocity is how fast something is moving at one specific moment. example: you can run on a treadmill
at 10 mph.
-velocity is speed with direction. example: you can run outside at 10 mph north.
- velocity is how fast something speeds up and slows down.
-velocity is a measurement of distance.

Which best represents the law of conservation of mass ?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction