four charges for the +q,+q,-q,-q are placed respectively at the four corners of a square of side a find the magnitude and direction of the electric field at the centre of the square

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~

neither accurate nor precise.

i don't understand. explain it clearly

there are no contact forces mentioned on the list of choices that you've provided.