What does this below rebus puzzle mean?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Which city is three-fifths chick two third cat and 50% goat?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Client Dempsey living in one of the East Coast states of the U.S. was talking to Landon Donovan, who was living in the West Coast state of the U.S.

Dempsey: What time is it?
Donovan: Wow, It is the same time here.

How is this possible?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?