Why are televisions attracted to people?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

What has many keys but can’t open a single lock?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?