Correct: it is a dimensionless number.
Yes. Conversion factors will generally be dimensionless constants.
infinity
No, but an angle is dimensionless.
Specific heat is dimensionless, and dimensionless units have the same value in any system. Specific heat is the ratio between two densities - that of the substance considered, and that of water. The ratio of two quantities of the same dimension will naturally be a dimensionless number.
the dimensionless numbers have the definition as that of dimensionless groups, and have all the properties which dimensionless groups have.
Angles are not dimensionless.
Correct: it is a dimensionless number.
No, a dimensionless quantity does not have a unit because it represents a pure number without any physical dimension. Examples of dimensionless quantities include ratios, proportions, and mathematical constants.
If a quantity is "dimensionless", that means it has no units, and it's just a number.
Yes. Conversion factors will generally be dimensionless constants.
..?
energy/mass example: calories/gram
No. "Dimensionless" means there are NO units involved.
Yes.
It is a dimensionless parameter since its just a ratio between two quantities of same unit.
Points are dimensionless.