1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
german
3 years ago
13

A 5 m deep deposit of sand and silt containing organic layers is to be compacted using explosives placed in the boreholes locate

d 8 m apart on a square grid. It is intended to create pore pressures which are at least equal to 80% of the effective overburden pressure. Estimate how many kg of TNT have to be distributed in each borehole in order to achieve this degree of liquefaction. How much is that per cubic meter of compacted soil?
Engineering
1 answer:
ipn [44]3 years ago
3 0

Answer:

kg of TNT = 10 kg

per cubic meter of compacted soil = 0.5%

Explanation:

Given Data

(1) Depth of sand to be compacted- 5m

(2) Explosives placed in boreholes located at 8m in square grid.

Requirement - To create atleast 80% pore pressure of the effective overburden pressure.

Upper bound value

RUG-RPP = 14 x (kg)1/3

Lower bound value        RUG-RPP = 3 x (kg)1/3

Hence, for 8m distance for upper bound value of TNT in kg, the equation can be written as

8 = 14 x (kg)1/3

Hence, . TNT weight required for this is 0.186 kg.

Hence, for 8m distance for lower bound value of TNT in kg, the equation can be written as

8 = 3 x (kg)1/3.

Hence, . TNT weight required for this is 18.96 kg.

Now, to achieve atleast 80% pore water pressure the weight of TNT required is 0.186 kg as per upper bound and 18.96 kg as per lower bound is required.

It is advised to take average of these two to achieve the required values of pore water pressure generation i.e 10 kg of TNT is required.

Considering unit weight of compacted sand as 20 kN/m3, the amount of TNT is 10 kg which is equivalent to 98.1 N. This is approximately 0.5% of the compacted soil.

You might be interested in
A DC generator turns at 2000 rpm and has an output of 200 V. The armature constant is 0.5 V-min/Wb, and the field constant of th
WITCHER [35]

Answer:

b. 10A

Explanation:

Using the formula, E= k × r×I

200= 0.5 ×2000×0.02×I

200=20×I

Dividing with 20

I = 200/20= 10A

4 0
3 years ago
Read 2 more answers
Which of the following is NOT part of a car's drive train?
FromTheMoon [43]

Answer:

B. rotor

Explanation:

The correct answer Is rotor because the others are part of a cars drivetrain

3 0
3 years ago
Read 2 more answers
Draw your vectors starting at the black dot. The orientation of your vectors will be graded. The exact length of your vectors wi
soldier1979 [14.2K]

A vector is a phenomenon which in mostly used in mathematics and physics and is related to direction and size.

<u>Explanation:</u>

In mathematics and physics, a vector is a component of a vector space. For some, particular vector spaces, the vectors have gotten explicit names, which are recorded beneath. Verifiably, vectors were presented in geometry and material science before the formalization of the idea of vector space.  

A vector is an amount or phenomenon that has two autonomous properties: magnitude and direction. The term likewise means the numerical or geometrical portrayal of such an amount.

4 0
3 years ago
2.
den301095 [7]
Jae pain seems the most off
4 0
3 years ago
An 1,840 W toaster, a 1,420 W electric frying pan, and a 70 W lamp are plugged into the same outlet in a 15 A, 120 V circuit. (T
Viktor [21]

Answer:

A)

Current drawn by toaster = 15.33 A

Current drawn by electric frying pan = 11.83 A

Current drawn by lamp = 0.58 A

B)

The fuse will definitely blow up since the current drawn by three devices (27.74 A) is way higher than 15 A fuse rating.

Explanation:

There are three devices plugged into the same outlet.

Toaster = 1840 W

Electric frying pan = 1420 W

Lamp = 70 W

Since the three devices are connected in parallel therefore, the voltage across them will be same but the current drawn by each will be different.

A) What current is drawn by each device?

The current flowing through the device is given by

I = P/V

Where P is the power and V is the voltage.

Current drawn by toaster:

I = 1840/120

I = 15.33 A

Current drawn by electric frying pan:

I = 1420/120

I = 11.83 A

Current drawn by lamp:

I = 70/120

I = 0.58 A

B) Will this combination blow the 15-A fuse?

The total current drawn by all three devices is

Total current = 15.33 + 11.83 + 0.58

Total current = 27.74 A

Therefore, the fuse will definitely blow up since the current drawn by three devices (27.74 A) is way higher than 15 A fuse rating.

5 0
3 years ago
Other questions:
  • For a p-n-p BJT with NE 7 NB 7 NC, show the dominant current components, with proper arrows, for directions in the normal active
    14·1 answer
  • Serves as a protective barrier to prevent contact with engergized ("hot") parts<br> within the unit
    13·1 answer
  • Oil with a density of 850 kg/m3 and kinematic viscosity of 0.00062 m2/s is being discharged by an 8-mm-diameter, 42-m-long horiz
    9·1 answer
  • Earth whose in situ weight is 105lb/cf and whose compacted weight is 122 lb/cf is placed in a fill at the rate of 260 cy/hr, mea
    14·1 answer
  • At the grocery store you place a pumpkin with a mass of 12.5 lb on the produce spring scale. The spring in the scale operates su
    5·1 answer
  • Your study space does not need to be quiet as long as you can ignore any noise coming from the space true or false?
    9·2 answers
  • How much memory can a 32 -bit processor support ?
    13·1 answer
  • ______ are an idication that your vehicle may be developing a cooling system problem.
    14·1 answer
  • What is a transition? A. An animation that happens on a single slide B. An outline format that uses roman numerals C. An image f
    10·1 answer
  • Work to be performed can come from the work package level of the work breakdown structure as well as other sources. Which of the
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!