Asystem is made up of several parts that

a. work opposite one another to perform unrelated tasks.

b. work together to perform a single task.

c. work independently to perform unrelated tasks.

d. work independently to perform several related tasks.

Knowing that the central portion of link bd has a uniform cross sectional area of 800 mm2 , determine the magnitude of the load p for which the normal stress in link bd is 50 mpa. (hint: link bd is a two-force member.) ans: p = 62.7 kn

Sports and entertainment class, your goal is to increase attendance and make a profit for a game by getting your team on a winning track with total salaries less than $3,000,000

For positive constants a and b, the force between two atoms in a molecule is given f(r) = −a r2 + b r3 , where r > 0 is the distance between the atoms. note: a and b are upper case letters. (a) find f '(r) = (b) find the critical point for f(r). r = (c) find f ''(r) = (d) find the value of r so that f ''(r) = 0.