For the same air velocity, air temperature, and cylinder temperature for two different diameter cylinders in cross flow, the heat transfer rate for the larger-diameter cylinder is

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

temp rises, and expansion

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.