The two connected cylindrical rods above have the following values for their dimensions: d1 = 48 mm d2 = 23 mm l1 = 1.7 m l2 = 0.9 m if, f1 = 122 kn f2 = 61 kn find the average normal stress (σ) for the mid-section of rod bc. include the correct sign for your answer. calculate your answer to one decimal place, and make sure that the absolute value is between 0 - 999, with the appropriate unit. (in other words, if you use the correct unit, your answer's absolute magnitude will be between 0 - 999.)

What are the phases shown in a and d called?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.