At transform boundaries:

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Question 2 (1 point)

Which of the following is a type of plate boundary where new sea floor is formed?

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Question 3 (1 point)

What type of plate boundary mainly surrounds the Antarctic Plate?

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Question 4 (1 point)

The farther from the mid ocean ridge, the ___________ the oceanic lithosphere

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Question 5 (1 point)

At transform-plate boundaries ____________.

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Question 6 (1 point)

The San Andreas Fault zone in southern California is an example of a ____________-plate boundary.

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Question 7 (1 point)

Segments of the mid-ocean ridge system are offset. Between the offset segments we observe ____________.

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Question 8 (1 point)

The mid-ocean ridges are elevated above the surrounding sea floor because ____________.

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Question 9 (1 point)

Which of the following is a type of plate boundary where new sea floor is formed?

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Question 10 (1 point)

Which of the following features characterize a divergent plate boundary?

Question 10 options:

Question 11 (1 point)

Examples of divergent boundary areas located on land (above sea level where we can see them!) include: (select all that apply)

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Question 12 (1 point)

The age of oceanic crust ____________ with increasing distance from a mid-ocean ridge.

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Question 13 (1 point)

As lithosphere cools to the sides of a mid-ocean ridge, it begins to ____________.

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Question 14 (1 point)

Why is the ocean deeper over older ocean floor than younger ocean floor?

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Question 15 (1 point)

Iceland is one of the few places in the world that is both above sea level and situated atop a ____________ plate boundary.

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Question 16 (1 point)

Mid-ocean ridges are ____________.

Question 16 options:

In the production of ammonia, the amount of nitrogen fed is 50 mol hr-1 set by the stoichiometric ratio of hydrogen to nitrogen for the feed stream (1). In addition, the fed nitrogen contains 0.2 mol hr-1 of inert gases (argon), which gradually build up in the recycle stream until the process is affected adversely. The single pass conversion is 20%. If all NH3 is removed in a separation step, and a purge stream (6) of 2 mol hr-1 is used to maintain the Ar mol percentage in the recycle stream at 10%. a. Calculate the composition of the purge stream. b. What is the mass% of the feed? (MW N: 14gmol-1 H: 1gmol-1Ar: 40gmol-1) c. Determine the production rate of ammonia in mol hr-1 d. Calculate the flowrate of N2 (entering the reactor). PLEASE EXPLAIN IN GREAT DETAIL

In this task the student supposed to do research and identify a major industrial fire accident in a chemical process plant or petroleum industry that resulted in huge loss of life and property. ASnd submit a report of about 2000 words on the critical analysis of the accident covering the following points –

(i) Detailed description about the accident including information on loss of life, damage to property and effect on environment.

(ii) Root cause analysis of the accident

(iii) Safety precautions that could have prevented the accident from happening

(iv) References

9. What is the rate of exchange of C from rocks to the Atmosphere-Ocean-Land-biosphere? (1 point)

10. What is the average rate of human C emissions into the atmosphere from Earth’s crust? (1 point)

11. Explain 2 ways humans are disturbing the C-cycle and creating an imbalance in the natural C-cycle. (4 points)

12. Explain 2 ways that scientists are confident that the increased CO₂ emissions is from human sources and the burning of fossil fuels. (4 points)

ing of fossil fuels. (4 points)

We want to remove a carcinogenic substance (which of course is in a small concentration)
from some industrial waste. As an engineer, you have found a special material in the shape
of a sphere of radius r0, in which the substance diffuses with diffussivity of D(eff).
Within the sphere, the substance is consumed (is bound) at an independent rate of its concentration,
i.e. its consumption per unit volume is ko.[ C(A,G)=-Ko]
The concentration of this substance in radious R is Co.

(a) We need to derive the expression for the distribution of the concentration of the substance in
a sphere from this special material, C(r), with the assumption that its consumption,
as has been said, is spatially uniform.

(b) Under what conditions is the concentration of the substance in the center of the sphere 0?

1. explain how the temperature and pressure affect extraction process

2. List and explain advantages of using plate columns in gas absorption tower

3. explain the importance of material of construction in the evaporation process

4. explain types of multiple effect evaporators and list their advantages

5. distinguish between the total condenser and partial condenser

An elementary irreversible gas-phase reaction, A -> 2B, is taking place in an isothermal batch reactor. Assume ideal gas behavior for both species. Initially, the reactor contains only the reactant A at a pressure of 5.0 atm, a volume of 20.0 L, and a temperature of 400 K. The rate constant at this temperature is 0.25 min^-1. Find the time required for the concentration of A to drop below 5% of its initial value in these two scenarios:

(a) A constant volume batch reactor (pressure increases over time)
(b) A constant pressure batch reactor, or equivalently a piston (volume increases over time).
(c) Comparing the times required from parts (a) and (b): If they are equal, why do you think this is the case, despite the different conditions? In the other possibility where one reactor reached the specified concentration sooner, why? What can you say about how conversion compares in the two reactors?

The combustion of n c3h8 = 100 kmol.h^-1 propane gas ( pure fuel stream) takes place at isobaric-atmospheric conditions ( P= 1atm) in a continuous reactor, in the presence of air and using an oxygen inlet of n O_2­( g) = 1000kmol.h-1 according to:

C₃H₈ + 5O₂( g) ----- 3CO₂ + 4H₂O

The inlet gases are supplied at T=25^oC, and leave the reactor at T= 300^oC, according to the following values:

1. Calculate the extent of reaction and fractional conversion of propane
2. Calculate the High Heating Value HHV_C3H8 and specific heat of reaction R1 at 25^oc and 1atm
3. Calculate heat released or absorbed in the process ( MW)

If the reaction takes place in a tubular reactor, following a first order kinetics, according to

-r_{C3H8 ( g) =} K. C_{c3H8( g)}    k = 60hr^-1

Iv estimate the reactor volume needed to carry out the reaction in previous conditions, c₃H₈ (g) = 0.5

An equimolar mixture of A and B is flashed. What is the maximum possible liquid concentration of B in the product? Assume that A is more volatile and the relative volatility is 4.38.

The answer should be within 0.02 of the correct answer.

. The purchased cost of 200000 inch3 stainless hemispherical tank in 1996 was RO 10700. If the tank is covered fully with 2 inch thickness magnesia block, estimate the present total cost for installed and insulated tank. The cost for covering 2 inch magnesia was 5.1 RO per ft2 and installation labor cost 4.3 RO per ft2 .

On the basis of field observations and information from the local authority and water suppliers, identify the major consumer processes utilizing your local river system. What possible conflicts could arise and how might these conflicts be rationalized?

As head separations engineer at BASF, you are designing a distillation process to separate chlorobenzene and benzene. Your initial feed stream is a saturated liquid, has a flowrate of 500 kmol/hr and is 50 mol% benzene. The column available to you has a total condenser and a partial reboiler. The average relative volatility is 2.5. You need to achieve a distillate that is 4 mol% chlorobenzene and a bottoms that is 97 mol% chlorobenzene.

a) What are the distillate and bottoms flow rates?

b) What is the minimum reflux ratio? How many stages would you need if you operated at the minimum reflux ratio?

c) If your reflux ratio is infinite, what is your boil-up ratio? How many stages would you need if you operated at infinite reflux?

Hint: Apply your knowledge of multi-component distillations.

The initial information you received from the reaction design team was incorrect. Your feed stream is actually arriving as a saturated vapor.

d) Now that your feed stream is a saturated vapor, do your distillate and bottoms flow rates change? If so, what are they now?

e) If your feed stream is a saturated vapor, what is the minimum reflux ratio? How many stages would you need if you operated at the minimum reflux ratio?

f) If your feed stream is a saturated vapor and your reflux ratio is infinite, what is your boilup ratio? How many stages would you need if you operated at infinite reflux?

Hint: Apply your understanding of distillations at total reflux.

Climate change is affected by:

Interactions between the land and the atmosphere

The earth's energy balance

Cold fronts

Warm fronts

Snowstorms

Interactions between the land and the oceans

Interactions between the oceans and the atmosphere

A double-pipe heat exchanger operating in counter current mode is to heat a
fluid(Cp 1.7 kJ/kg K) from 50°C to 95°C at a rate of 4.5 kg/s. The heating is to be
accomplished by hot fluid (Cp=1.97 kJ/kg K) available at 200°C at a mass flow
rate of 6 kg/s. The inner tube is thin-walled and has a diameter of 4 cm. If the
overall heat transfer coefficient of the heat exchanger is 680 W/m2
°C,
determine the length of the heat exchanger required to achieve the desired
heating.

Data given:

Plastic 0.4 W/mK
brick 0.72W/m°C
plaster 0.36 W/m°C
cement 1.4 W/m°C
Polyurethane foam 0.025W/m °C
Glass fiber/fiber glass 0.036 W/m °C
Air 0.0198 W/m °C
Copper 380W/m °C

# just take the required data that u need