CREATE TABLE table_19994 ("Condition/Parameter" TEXT, "Coordinate velocity v dx/dt in units of c" TEXT, "Velocity angle \\u03b7 in i-radians" TEXT, "Proper velocity w dx/d\\u03c4 in units of c" TEXT, "Lorentz factor \\u03b3 dt/d\\u03c4 = E/mc 2" TEXT)

If the lorentz factor dt/d = e/mc 2 is 5 2.236, what is the proper velocity w dx/d in units of c?
SELECT "Proper velocity w dx/d\u03c4 in units of c" FROM table_19994 WHERE "Lorentz factor \u03b3 dt/d\u03c4 = E/mc 2" = '√5 ≅ 2.236'
SELECT "Proper velocity w dx/d\u03c4 in units of c" FROM "table_19994" WHERE "Lorentz factor \u03b3 dt/d\u03c4 = E/mc 2" = '√5 ≅ 2.236'