The universal quantifier is symbolized by an upside-down one.
Magnetic field equals the curl of a quantity denoted by this letter, the vector potential. The universal quantifier is symbolized by an upside-down one. Though not F, a value denoted by this letter equals internal energy minus temperature times entropy. The HTML tag for a hyperlink uses this letter of the alphabet. This letter, which stands for Helmholtz free energy, multiplies e raised to the negative activation energy over RT in the Arrhenius equation. It equals ten in hexadecimal. A purine symbolized by this letter base-pairs with thymine. Retinol is this vitamin, important for eye health. For 10 points, name this letter which symbolizes the time derivative of velocity, acceleration.
Magnetic field equals the curl of a quantity denoted by this letter, the vector potential.
{a} [or A]