Posted by **Ray** on Tuesday, November 3, 2009 at 10:12pm.

A tunnel of length L = 141 m, height H = 6.9 m high, and width 6.0 m (with a flat roof) is to be constructed at distance d = 60 m beneath the ground. The tunnel roof is to be supported entirely by square steel columns, each with a cross-sectional area of 960 cm^2. The mass of 1.0 cm^3 of the ground material is 2.8 g.

What is the total weight of the ground material the columns must support?

## Answer this Question

## Related Questions

- Elasticity (Physics) - A tunnel of length L=150m, height H=7.2m, and width w=5....
- Circle geometry! - A circular tunnel, 20 m in diameter is blasted through a ...
- physics, please help me, this question is hard - John Stands at the edge of a ...
- physics - A large building has an inclined roof. The length of the roof is 69.5 ...
- Physics - My problem question: "A ball is thrown up onto a roof, landing 4.0 ...
- MATH C30 - A roof in the shape of an upside down cosine wave is to be built to ...
- Math C30 ( trig ) - A roof in the shape of an upside down cosine wave is to be ...
- MATH help - A box with no top is to be constructed from a piece of cardboard ...
- trigonometry - Two buildings with flat roofs are 60m apart. From the roof of the...
- Southern Union - A large building has an inclined roof. The length of the roof ...