Consult your doctor if: 1  Your headache symptoms occur more than 15 days a month or require frequent over-the-counter pain medicine. 2  You have a severe headache, and over-the-counter pain medicine doesn't help. 3  You miss school or work because of frequent headaches or the headaches interfere with your daily life. 4  Definition. Causes.
Newton's law of gravitation. (nt'nz) The principle that expresses the force of gravitational attraction between two bodies as a function of their mass and their distance.
Newton and Einstein's Theory of Gravity are defective in leaving out the vector energy in their Gravity Theory. The correct Theory of Gravity involves quaternion energy that consists of scalar energy and vector energy E= -mu/r + mcV. The Quaternion Theory of Gravity confirms Newton's Universal Law as opposed to Einstein's space warping Theory. Newton's law of Gravity involves matter creating forces that change motion and Einstein's Relativity involves matter warping space and changing motion. The Deflection of 1.7 seconds explained by Einstein as the result of curvature is better explained by Newton, where g is the earths gravity acceleration 9.8 m/s^2 and Rs= 150Gm distance to the sun and d the deflection due to the earth's gravity: