To tell you the truth, Omar, there is not such symbol in kana. I don't know where you found it but it must have a mistake or something else.

か is a symbol in kana, but か゜ is not. You can only use "゜"　for は、ひ、ふ、へ、ほ(ha, hi, fu, he, ho): ぱ、ぴ、ぷ、ぺ、ぽ(pa, pi, pu, pe, po).

its ka, its the hiragana version. its pronounced k-a the family is ka, ki, ku, ke, ko k-a k-E (the sound is saying the letter E) k-oo k-e k-oh

http://en.wikipedia.org/wiki/Ka_%28kana%29 "A handakuten (゜) does not occur with ka in normal Japanese text, but it may be used by linguists to indicate a nasal pronunciation [ŋa]."

http://ja.wikipedia.org/wiki/%E3%81%8B%E3%82%9C Read it, or use Google translate.