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
AURORKA [14]
3 years ago
7

If the elastic modulus of cobalt (co) is 200 gpa, and the elastic modulus of tungsten carbide (wc) is 700 gpa, calculate the upp

er and lower bound estimates of the elastic modulus of a 10 vol% co – 90vol% wc composite.
Chemistry
1 answer:
Dmitry_Shevchenko [17]3 years ago
7 0
To determine the upper bond
Ec(u) = EmVm + EpVp
Em is the elastic modulus of cobalt.
E₁ is the elastic modulus of the particulate
Vm is the volume fraction of cobalt
Vp is the volume fraction of particulate
substitute
Ec(u) = 200 (Vm) + 700 (Vp)
To determine the lower bound
Ec (l) = EmEp/VmEp+ VpEm
Substitute
Ec (l) = 200(700)/Vm(700) + Vp (200)
Ec (l) = 1400/7Vm+2Vp
You might be interested in
What is the smallest part of all matter
Ostrovityanka [42]
An atom is the smallest part of all matter.
7 0
3 years ago
Read 2 more answers
What is the ∆G for the following reaction between O3 and O2? 3O2(g) 2O3(g) Given: O3: ∆H = 285.4 kJ ∆S = -137.14 J/K)
Natali [406]
We’ll be using the equation:
dG = dH - TdS (replace ‘d’ with triangle)

I’m going to assume 0 degrees Celsius.
At 0 C (273 K):

dG = dH - TdS
dG = (285,400 J) - (273 K)(-137.14 J/K)
dG = 285,400 J + 37,439.2 J
dG = 322,839.2 J or 322.84 kJ

The dG of this reaction is +322.84 kJ. This reaction is not considered spontaneous.

This answer, in this instance, would be D. If the temperature used in the question is not 0 degrees C, replace the temperature that I used for calculation with the Kelvin temperature given in the problem (K = C + 273), and simplify to find the answer.
6 0
3 years ago
What is the Lewis structure for H2Se
S_A_V [24]
Basically since there’s 2 hydrogen’s there will be two H’s on either side of your other element. And Se is in group 6 which means it has 6 valence electrons. When you combine 6 and 2 from the hydrogen you get 8. You then should place 8 dots around Se two on each side.

So something like H Se(with 8 dogs around it) H
6 0
3 years ago
The presence of no subscript for an element in a chemical formula means that there is/are?
nadezda [96]

Answer:

only one atom of that element

Explanation:

Example:

   H2 O    has two hydrogenatoms and ONE Oxygen atom

4 0
2 years ago
Which of the following is not considered a base unit according to the SI units of measurement
lakkis [162]
<h2>second</h2>

<h2>hop this may help you</h2>

5 0
3 years ago
Other questions:
  • Is hardness physical or chemical property
    13·1 answer
  • What are the products formed when zinc reacts to dilute hydrochloride acid
    12·2 answers
  • The process that changes a substance from a liquid to a gas below the substance's boiling point
    9·1 answer
  • Classify each of the following as energy primarily transferred as HEAT or energy primarily transferred as WORK.
    7·1 answer
  • Find the density of a piece of glass with a mass of 500g and a volume of 200cm3
    9·1 answer
  • natural rubber is white, but the one we see in cars is black, because it was combined with carbon. It is a physical or chemical
    7·1 answer
  • Which of the following has a mass of 10.0 g?
    11·1 answer
  • A family from Ottawa turned off the heat before flying to Florida for a winter holiday. When they came home, all of their water
    9·2 answers
  • If an acid/base dissociates completely in water what type of substance is it? Does this mean the acid/base is dangerous?
    13·1 answer
  • How to prepare 1m of a solution​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!