Question

1. A system with bars is subjected to uniform loading, as shown below. The diameters of Bar 1, Bar 2, and Bar 3 are 20 mm, 20 mm, and 25 mm, respectively. (15 points)
(a)​Try to obtain the axial force of Bar 1, Bar 2, and Bar 3.
(b)​Try to obtain the axial stress of Bar 1, Bar 2, and Bar 3.

Answer 1

The size of the alpha particle, the nucleus of the helium atom, has been measured more accurately than ever before. Results now indicate a size 1.67824(83) femtometers, which is 4.8 times more precise than previous measurements.