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
Black_prince [1.1K]
3 years ago
8

1- The preexponential and activation energy for the diffusion of iron in cobalt are 1.1×10-5 m 2 /s and 253,300 J/mol, respectiv

ely. At what temperature will the diffusion coefficient have a value of 2.1×10-5 m 2 /s ?
Engineering
1 answer:
n200080 [17]3 years ago
4 0

The temperature at which the diffusion coefficient have a value of 2.1×10-5 m 2 /s is  -47078 K.

Using the relation;

logD = logDo - Ea/2.303RT

D = diffusion coefficient

Do =  preexponential

Ea = activation energy

R = gas constant

T = temperature

Substituting values;

log(2.1×10-5)= log (1.1×10-5 ) - 253,300/2.303 × 8.314 × T

log(2.1×10-5) -  log (1.1×10-5 ) =  - 253,300/2.303 × 8.314 × T

log[2.1×10-5/1.1×10-5] = - 253,300/2.303 × 8.314 × T

0.281 × (2.303 × 8.314 × T) = - 253,300

T =  - 253,300/2.303 × 0.281 × 8.314

T = -47078 K

Learn more: brainly.com/question/14283892

You might be interested in
A. 50
Mademuasel [1]

Answer:ahahahahahah

Explanation:boyboy

6 0
3 years ago
What is the mechanical advantage of a pulley with 3 support ropes?
snow_tiger [21]

Answer:

The mechanical advantage is 3 to 1

Explanation:

A frictionless pulley with three support ropes carries equal tension on each of the ropes thus;

Tension in each pulley rope = T

Total tension in the 3 ropes = 3 × T = 3·T

Direction of the tension forces on each rope = Unidirectional

Total force provided by the 3 ropes = 3·T

Therefore, a force, T, applied at the end of the rope will result in a lifting force of 3·T

Hence, the mechanical advantage = 3·T to T which is presented as follows;

Mechanical \ advantage = \dfrac{3 \cdot T}{T}  = \dfrac{3}{1}

The mechanical advantage = 3 to 1.

5 0
3 years ago
The selective thickness shims are measured with a(n): Group of answer choices hydraulic press. outside micrometer. dial indicato
alexgriva [62]

The selective thickness shims are measured with an outside micrometer.

<h3>What is a micrometer?</h3>

It should be noted that a micrometer simply means an instrument for making precise linear measurement of dimensions.

In this case, the selective thickness shims are measured with an outside micrometer.

Learn more about micrometer on:

brainly.com/question/2176082

#SPJ12

7 0
3 years ago
"Given a nodal delay of 84.1ms when there is no traffic on the network (i.e. usage = 0%), what is the effective delay when netwo
shtirl [24]

Answer:

Explanation:

effective delay = delay when no traffic x \frac{100}{100- network\r usage}

effective delay = 84.1 \times \frac{100}{100-39.3}=138.55024711697ms

4 0
3 years ago
A heat exchanger is designed to is to heat 2,500 kg/h of water from 15 to 80°C by engine oil. The configuration of the heat exch
alexgriva [62]

Answer:

see explaination

Explanation:

kindly check attachment for the step by step solution of the given problem.

3 0
3 years ago
Other questions:
  • A spherical balloon with a diameter of 9 m is filled with helium at 20°C and 200 kPa. Determine the mole number and the mass of
    12·1 answer
  • What is the maximum % carbon for structural steel?
    8·1 answer
  • Critical Thinking Scenario The Vice President for Compliance Management, Alexander Goodenuff, supports the position taken by Hen
    11·1 answer
  • 1)A wheel is used to turn a valve stem on a water valve. If the wheel radius is 1 foot and the stem, (axle), radius is .5 inches
    10·1 answer
  • An automobile having a mass of 1100 kg initially moves along a level highway at 110 km/h relative to the highway. It then climbs
    7·1 answer
  • The moons light-colored highlights are
    7·1 answer
  • Need help giving out brainlest
    9·1 answer
  • During her soccer game, Brittany hears her coach tell her team to look for better shot selection. The offensive strategy her coa
    7·2 answers
  • What CAR would you buy if you had 100,000,000 million dollars ​
    7·2 answers
  • FOR DARKEND1<br><br>÷<br><br><br>try copy and paste​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!