As to string theory, they were "seen", using micro-psi(a form of yoga)80 to 90 years ago by Ledbetter and Besant. They saw atoms, nuclei, quarks, sub-quarks(UPA they called it)by focussing matter waves. The UPA is an involuting/evoluting torus, 2 1/2 solenoid turns thru the core, 3 bright white lines, 7 rainbow colored lines; for your 10 curled up "dimensions" of superstring theory. It was an article in Infinite Energy Magazine, Vol 6, issue 36, 2001 : ESP of quarks. I'm sure they have a back issue you could buy. L & B even discovered isotopes(Ne22)before scientists did........As to acceleration : that's W
P). W
P is deceleration which you CAN feel/sense....as TIME.