The hair breaks under a 1.2 N tension. What is the cross-sectional area of a hair?

I need an explanation or the calculation too, so I will not give points for only the answer.

temp rises, and expansion

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.