The gravitational force is caused by a mass charge moving in a gravitational field.
The effect is to push particles around.
- The cause is mass charge times the velocity contracted with the symmetric
field strength tensor.
The effect is to change momentum with respect to the interval .
If the sign of mass charge is inverted ,
is invariant so there is one distinguishable mass charge.
Mass charges are forced toward each other due to the negative sign of the force.
Slide 38 looks more like a mother every day.