What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

What number when divided in half becomes zero?

What is the Surname of Barbie Doll?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

What goes up but never comes down?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?