If it's at the start of a sentence - yes, otherwise - no.
The capital form of the letter "f" is "F".
All proper nouns start with a capital letter.
Yes. It should be Worcestershire.
Yes. Every letter in WORLD is capitalized.
no, only the island's name needs a capital
The capital letter of Australia is "C".
The Greek capital letter for Phi is Φ.
The Greek capital letter for Lamda is Λ.
The Greek capital letter for Xi is Ξ.
Yes, it is short for Veterinarian which has a capital letter.
do you use a capital letter for the word knighted
The Greek capital letter for Omega is Ω.
The Greek capital letter for Theta is Θ.
The Greek capital letter for Psi is Ψ.
The Greek capital letter for Delta is Δ.
The Greek capital letter for Sigma is Σ.
The Greek capital letter for Gamma is Γ.