Find the total weight of the ground material

Reference no: EM13278075

A tunnel of length L = 146 m, height H = 7.7 m high, and width 5.7 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 cm2. The mass of 1.0 cm3 of the ground material is 2.8 g.

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

(b) How many columns are needed to keep the compressive stress on each column at one-half its ultimate strength?
columns

Reference no: EM13278075

Questions Cloud

Find the time domain expression for magnetic field : The electric field of a uniform plane wave propagating in lossless isotropic medium is E(x,t) = 60π cos(3*108 t + 4x) αy V/m. The magnetic field at point (0,0,0) when t = 0 is 1A/m. The unit of t is second and the unit of x is meter.

State the molecular total ionic and net ionic equations : Write the molecular, total ionic and net ionic equations summarizing the reaction between aqueous solutions of potassium chloride and silver nitrate.

Find the capacitance per unit area between the plates : Conducting plates at z=5m and z=15m are held at potentials -10V and 10V, respectively. If the region between the plates is a homogeneous dielectric with ε = 2ε0, solving the Laplace equation to find: (1) the potential distribution V(z) between two ..

Do a feasibility study to assess the likelihood of the proj : Do a feasibility study to assess the likelihood of the project being completed and producing useful results. If possible, the feasibility study should contain some preliminary results (e.g. a pilot data set and initial data analysis).

Find the total weight of the ground material : A tunnel of length L = 146 m, height H = 7.7 m high, and width 5.7 m (with a flat roof) is to be constructed at distance d = 60 m beneath the ground, What is the total weight of the ground material the columns must support

Design a one bit block that can be cascaded together : Design a one bit block that can be cascaded together to generate the final signal. Assume that you are allowed to generate a different block to treat the signed bit. Provide design for the two blocks and the complete circuit.

What they tell you about their religion : Discuss any misconceptions you had about the religion you researched and analyze how your prior understanding about this religion was altered (if at all) through your encounter.

Determine what is the maximum allowable length of wire : An electrical device is designed to draw 4.0 amps. A 0.5 mm diameter copper wire is used to connect the device to a power source. What is the maximum allowable length of wire (in m), if the voltage across the wire is not supposed to drop by more t..

At what voltage would the base width be reduced to zero : An increase in the reverse bias base -to-collector voltage reduces the bas width (base modulation effect). At what voltage would the base width be reduced to zero ("punch through" breakdown) if the zero-bias base width is 0.937 μm

User Account

All Pages