I can write cow in 13 letters.

Can You?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

When does a USA Potato change its nationality?

What kind of band never plays music?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

What can go up a chimney down, but can’t go down a chimney up?

Why did the Girl throw the butter out of the window?

You bought me for dinner but never eat me. What am I?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.