User:Ashu tripathi bittu/sandbox

WHY IS DIFFICULT TO WALK ON A VERY SMOOTH FLOOR? ANS: This is because of friction. The smoother a surface is the lesser will be the friction on it. The friction between our shoes and a surface which is very smooth is very less. So we often slip when we walk on such a surface. Why is the word ‘AMBULANCE’ written inverted in Front of an ambulance. ANS: The word is written inverted because the driver in front of ambulance; who sees the ambulance in his/her rear view mirror sees a laterally inverted image of the word and reads it correctly. He or she can then give way to the ambulance. Why do people have different Coloured eyes? ANS: people have different coloured eyes such as black, blue, grey, green etc. The colour of the eye depends on a pigment called melanin. Someone with a lot of Melamine will have black or brown eyes. Someone with less melamine will have blue or green eyes.