Ask Question, Ask an Expert

+61-413 786 465

info@mywordsolution.com

Ask Physics Expert

Academics


Home >> Physics

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

Physics, Academics

  • Category:- Physics
  • Reference No.:- M9857417

Have any Question?


Related Questions in Physics

Question a ring with radius r and a uniformly distributed

Question: A ring with radius R and a uniformly distributed total charge Q lies in the xy plane, centered at the origin. Part A: What is the potential V(z) due to the ring on the z axis as a function of z? Express your an ...

Question rotational kinetic energy and conservation of

Question: Rotational Kinetic Energy and Conservation of Energy Ranking Task The five objects of various masses, each denoted m, all have the same radius. They are all rolling at the same speed as they approach a curved i ...

Question a textbook of mass 198kg rests on a frictionless

Question: A textbook of mass 1.98kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.160m , to a hanging book with mass 3.01kg . The system is released fro ...

Question part a at what angle icirccedil1 to the normal

Question: Part A: At what angle θ1 to the normal would the first dark ring be observed? Part B: Suppose that the light from the pinhole projects onto a screen 3 meters away. What is the radius of the first dark ring on ...

A mass m is projected vertically upwards at t 0 from y 0

A mass m is projected vertically upwards at t = 0 from y = 0 with initial velocity v0 > 0 along the y-axis. (+y is upwards) The mass moves under the constant force of gravity, and also a force of air resistance with magn ...

Question in a pig-calling contest a caller produces a sound

Question: In a pig-calling contest, a caller produces a sound with an intensity level of 107 dB. How many such callers would be required to reach the pain level of 120 dB? The response must be typed, single spaced, must ...

Question a pendulum on mars a certain simple pendulum has a

Question: A Pendulum on Mars. A certain simple pendulum has a period on the earth of 1.65 s. What is its period on the surface of Mars, where g = 3.71 m/s 2 ? The response must be typed, single spaced, must be in times n ...

Question an object is 40 cm in front of a concave mirror

Question: An object is 40 cm in front of a concave mirror with a focal length of 20 cm. Use ray tracing to locate the image. Is the image upright or inverted? The response must be typed, single spaced, must be in times n ...

Question a satellite orbiting the moon very near the

Question: A satellite orbiting the moon very near the surface has a period of 110 min, What is free-fall acceleration on the surface of the moon? The response must be typed, single spaced, must be in times new roman font ...

Question a projectile is fired with speed v0 at an angle

Question: A projectile is fired with speed (V0) at an angle theta) from the horizontal as shown in the figure . Part B: What is the range of the projectile? Express the range in terms of (V0, theta, or g) Part C: Find th ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As

Follow Us

© Copyright 2013-14 mywordsolution.com All rights reserved