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
andreev551 [17]
3 years ago
13

1. A soil core sampling tube of 4 cm diameter, 12 cm length and initial mass of 0.525 kg (sample only), was dried at 105o C and

had final mass of 0.490 kg. Determine dry bulk density, porosity and water content. 10 pts
Engineering
2 answers:
belka [17]3 years ago
8 0

Answer:

porosity = 0.07 or 7%

dry bulk density = 3.25g/cm3]

water content =

Explanation:

bulk density = dry Mass / volume of  sample

dry mass = 0.490kg = 490g

volume = πr2h = 3.142 * 2 *2 *12 = 150.8cm3

density = 490/150.8 = 3.25g/cm3

porosity = \frac{wet mass - dry mass }{wet mass} = \frac{0.525 - 0.49}{0.525} = 0.07 or 7%

water content =  \frac{wet mass - dry mass}{wet mass} = 7%

amm18123 years ago
8 0

Answer:

Given diameter 4cm=0.04m,lenght=0.12m

Iniatial mass m1=0.525kg final mass m2=0.490kg

dry bulk density =?

Porosity=?

Water content=?

Water content

Mass of water=0.525-0.490=0.035kg

m=Mw/Ms=0.935)0.525=0.0667 Pr 6.67%

Dry bulk density

Recall Density= mass/volume

Volume =πr^2h=π*(0.02)^2*0.12=7.54*10^-3m^3

Dry density=0.490/(7.54*10^-3)=64.97kg

Porosity

n=e/1+e

Were void ratio e=0.0667*2.6=0.1734

Porosity=0.1734/1+0.1734=0.15

You might be interested in
Based on these statements:
Evgen [1.6K]

Answer:

the third statement is true

Explanation:

given data

Lenovos cost more than Dells

Lenovos cost less than Apples

solution

we have given 1st statement that is express as

cost (Lenovo) > cost (Dell)     ..................1

and

2nd statement that is express as

cost (Lenovo) < cost (Apple)

so we can say it as

cost (Apple) > cost (Lenovo)       ......................2

and

now above Both equation 1 and 2 can be written as

cost (Apple) > cost (Lenovo) > cost (Dell)      .........................3

so we can say cost of Apples is more than the cost of Lenovos and the cost of Dells

so as that given 3rd statement is true

7 0
3 years ago
Between chain, belt and gear drive, which causes more friction?​
loris [4]

Answer:

All of them cause friction

Explanation:

google

6 0
2 years ago
Your grandmother is concerned about reducing her winter heating bills. Her strategy is to loosely fit rigid polystyrene sheets o
Anit [1.1K]
Do it your self zzzh
6 0
3 years ago
In 1945, the United States tested the world’s first atomic bomb in what was called the Trinity test. Following the test, images
Zarrin [17]

Answer:

r=K A^{1/5} \rho^{-1/5} t^{2/5}

A= \frac{r^5 \rho}{t^2}

A=1.033x10^{21} ergs *\frac{Kg TNT}{4x10^{10} erg}=2.58x10^{10} Kg TNT

Explanation:

Notation

In order to do the dimensional analysis we need to take in count that we need to conditions:

a) The energy A is released in a small place

b) The shock follows a spherical pattern

We can assume that the size of the explosion r is a function of the time t, and depends of A (energy), the time (t) and the density of the air is constant \rho_{air}.

And now we can solve the dimensional problem. We assume that L is for the distance T for the time and M for the mass.

[r]=L with r representing the radius

[A]= \frac{ML^2}{T^2} A represent the energy and is defined as the mass times the velocity square, and the velocity is defined as \frac{L}{T}

[t]=T represent the time

[\rho]=\frac{M}{L^3} represent the density.

Solution to the problem 

And if we analyze the function for r we got this:

[r]=L=[A]^x [\rho]^y [t]^z

And if we replpace the formulas for each on we got:

[r]=L =(\frac{ML^2}{T^2})^x (\frac{M}{L^3})^y (T)^z

And using algebra properties we can express this like that:

[r]=L=M^{x+y} L^{2x-3y} T^{-2x+z}

And on this case we can use the exponents to solve the values of x, y and z. We have the following system.

x+y =0 , 2x-3y=1, -2x+z=0

We can solve for x like this x=-y and replacing into quation 2 we got:

2(-y)-3y = 1

-5y = 1

y= -\frac{1}{5}

And then we can solve for x and we got:

x = -y = -(-\frac{1}{5})=\frac{1}{5}

And if we solve for z we got:

z=2x =2 \frac{1}{5}=\frac{2}{5}

And now we can express the radius in terms of the dimensional analysis like this:

r=K A^{1/5} \rho^{-1/5} t^{2/5}

And K represent a constant in order to make the porportional relation and equality.

The problem says that we can assume the constant K=1.

And if we solve for the energy we got:

A^{1/5}=\frac{r}{t^{2/5} \rho^{-1/5}}

A= \frac{r^5 \rho}{t^2}

And now we can replace the values given. On this case t =0.025 s, the radius r =140 m, and the density is a constant assumed \rho =1.2 kg/m^2, and replacing we got:

A=\frac{140^5 1.2 kg/m^3}{(0.025 s)^2}=1.033x10^{14} \frac{kg m^2}{s^2}

And we can convert this into ergs we got:

A= 1.033x10^{14} \frac{kgm^2}{s^2} * \frac{1 x10^7 egrs}{1 \frac{kgm^2}{s^2}}=1.033x10^{21} ergs

And then we know that 1 g of TNT have 4x10^4 erg

And we got:

A=1.033x10^{21} ergs *\frac{Kg TNT}{4x10^{10} erg}=2.58x10^{10} Kg TNT

3 0
3 years ago
Which condition allows the instrument air reserve header cyclinders to be stored with the instrument air compressor
goblinko [34]

Answer:

C) The only motor-driven machinery in the room is for the instrument air equipment

Explanation:

Quizlet just practiced flashcards :)

8 0
1 year ago
Other questions:
  • A manufacturer makes two types of drinking straws: one with a square cross-sectional shape, and the other type the typical round
    9·1 answer
  • A frustum of cone is filled with ice cream such that the portion above the cone is a hemisphere. Define the variables di=1.25 in
    9·1 answer
  • Compared to 15 mph on a dry road, about how much longer will it take for
    12·2 answers
  • Why Your first project as the new web designer at Smart Design is to increase web traffic to help boost web orders. Before you b
    6·1 answer
  • When moving cylinders always remove and make
    8·1 answer
  • A square isothermal chip is of width w 5 mm on a side and is mounted in a substrate such that its side and back surfaces are wel
    11·1 answer
  • What is one major life lesson you learned from the movie; ¨Spare Parts¨
    6·2 answers
  • A total of 245 kip force is applied to a set of 10 similar bolts. If the spring constant of each bolt is 0.4 Mlb/in and that of
    9·1 answer
  • Plz help If an item is $13.00 for a case of 24, then it is $
    11·2 answers
  • Write an<br> algorithm and draw a flowchart to convert the length in feet to<br> centimeter
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!