Moment of inertia of thin-walled sections body structure typically consists of beams with thin-walled sections in which the width-to-thickness ratio, b/t, is large (b/t > 60). a) write an expression for the exact area moment of inertia about the x axis, ixx. b) whent is very small compared to the other section dimensions, we can approximate the exact ixx with an expression linear in t. using either a taylor expansion of part a or by elimination of terms of t of second and higher order, write the linear approximation for ixx. c) for b=50 mm, h=100 mm, and 5

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

i think the answer is a and b

i wish you luck

elctricity and magnet is conversion to it