Good Riddles

Question: Can a man legally marry his widow's sister in the state of California?

Question: What gets easier to pick up the larger it gets?

Question: A poor man is sitting in a pub. He sees that the man next to him is extremely rich.

Poor man: I have an amazing talent; I know almost every song that has ever existed.

The rich man laughs.

Poor man: I am willing to bet you all the money you have in your wallet that I can sing a popular song that includes a lady's name of your choosing.

The rich man laughs again.

Rich man: OK, how about my daughter's name, Joanna Armstrong-Miller?

The poor man goes home rich.

What song did he sing?

Question: You are in a car with some helium balloons and hit the gas. While you accelerate, which way does the balloon move?

Question: A man murders his wife with a knife in their car. Nobody is around to see this. He throws her out of the car being careful not to leave any fingerprints on her body. Next he throws the knife off of a cliff into a gorge where it will never be found and he goes home. An hour later the police call him and tell him that his wife has been murdered and he needs to come to the scene of the crime immediately. As soon as he arrives, he is arrested.

How did they know he did it?