Recent content by brbeck777

Does anybody have a theory on what existed before the big bang and what caused the big bang? There must have pre-existed energy to create that kind of a bang!

You are correct jarekipe in saying that we use it to predict.

That means that we can't do it not God. I appreciate your sense of humor. Thanks.

This is one of many questions that I have pondered over time. Where does energy come from? What produces gravity within mass? Does the universe and time have an end or not? If you divide and atom down to protons, nuetrons and electrons, then divide down to quarks then to string theory then...

I really appreciate all of your responses and help. I applied to this problem the same way I would consider the tunnel under water but with the weight of wet sand. Thanks Brian

The angle of repose from horizontal is 35 degrees.

yes, that is exactly what I need. How do you solve for the top and side forces? Steel in this project is too expensive to oversize.

I forgot to mention that the tunnel is square not round. Sorry.

I am working on a project where I need to design a tunnel under a large sand pile. Previously I took the area on top of the tunnel and considered the volume directly above the tunnel and calculated the total weight. This may be correct but when considering material in a pile does the force...

I need to size a member to withstand large falling rocks, but it seems that if I do not know how far the rock travels after impact, I have insufficient information. I do not have the resources to test falling rocks on an array of members and then measure the distance traveled. I need a basic...