In 2000 words

: Discus how the fourth industrial revolution could impact on improving electricity sector in South Africa

Match the rock families with the processes that form them.

Group of answer choices

Cooling of magma.

      [ Choose ]            Igneous Rock            Metamorphic Rock            Sedimentary Rock      

Layers of sediment lithify

      [ Choose ]            Igneous Rock            Metamorphic Rock            Sedimentary Rock      

High temperature, high pressure, and hydrothermal fluids

      [ Choose ]            Igneous Rock            Metamorphic Rock            Sedimentary Rock      

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1. The formation of silver hydroxide, AgOH (s), is a precipitation reaction used to remove silver from water originated from industries of photographic material processing. Similar reactions are used to remove other heavy metals in water. The pKs of the relevant reaction shown below is 7.7 at 25 °C.

AgOH (s) ↔ Ag⁺ + OH^-

If the pH of a specific wastewater is initially 6.5 and after treatment is 10.0, what is the maximum concentration of soluble Ag⁺ in mg/L a) prior and b) after treatment? c) Is pH 13 enough to reduce silver concentrations to Secondary MCL (maximum contaminant level) of 0.1 mg/L?

Data:

1) Atomic weight: Ag=107.87 g/mole; O=16.00 g/mole; H=1.01 g/mole;

2) Assume that any other compounds or metals in this wastewater do not influence this solubility reaction.

3) The temperature of the wastewater is 25 ºC.

How would your ecological footprint be different if you lived in a less industrialized country?

Q) Which of the following statements is not correct?

The Eastern hemisphere is defined by longitude

The Prime Meridian is 0 degrees of latitude

The international date line is in the middle of the Pacific Ocean

Lines of latitude are parallel

The Arctic circle is outside of the circle of illumination on December 22nd

Q) At the equator the daylength on June 1 is...

8 hours

14 hours

12 hours

24 hours

0 hours

Q) What portion of the atmosphere does the biosphere primarily interact with?

ozonosphere

lithosphere

troposphere

Heterosphere

Q) Which of the following is not a way in which we define the atmosphere in geography?

function

temperature

height

Composition

Q) Mountain-valley breezes are caused by

valley air ascending the mountain slopes at night

warmer air descending mountain slopes during the day

gravity drainage

warm air rising upslope during the day and cooler air descending the slopes at night

Q) Which of the following is true of objects and wind moving over a distance on Earth's surface?

They are affected only by the pressure gradient and the friction force

They are apparently deflected clockwise from a straight path in the Northern hemisphere.

They are always deflected from a straight path to the west in the southern hemisphere

They are always deflected clockwise by the friction force

Q) The largest portion of fresh water today is located in

ice caps and glaciers

clouds

the major rivers and lakes of the world

groundwater resources

Q) The property that makes water 'wet' and is the cause of capillary action is:

molecular hold

hydrogen bonding

covalent bonding

atomic friction

Q) The Pacific Northwest region of the US is a moist environment because of

the effect of maritime air masses

all of the above

the predominant direction the winds blow at that latitude (45 to 50 degrees north)

the presence of mountains

Q) Which of the following lists the correct, generalized sequence of Koppen climates from the equator to the poles?

H --> B --> C --> D --> A

A --> B --> C --> D --> E

H --> D --> C --> B --> A

E --> D --> C --> B --> A

Q) The gas that is thought to be responsible for more than half of the anthropogenic warming of the atmosphere is

water vapor

carbon dioxide

methane

CFC's

1a. A ternary mixture contains 20 mol % A , 40mol % B, and 40 mol % C. At a pressure of 80 atm and a temperature of 75?C the fugacity coefficient of components A ,B and C in this mixture are 0.4, 0.6 and 0.8 respectively. What is the fugacity of the mixture?

Explain the basis of the equation you use in (a).

1b. For the system ethyl ethanoate (1) /n -heptane (2) at 450K , assuming the validity of the modified raoult’s law

1. Make a BULB P calculation for T = 450 K, x₁ = 0.06
2. Make a DEW P calculation for T = 450 K, y₁ = 0.06
3. Determine if the system is an azeotrope

Given the following data;

Iny₁ = 0.95X₂² ;   Iny₂ = 0.95X₁²     P₁^sat 80.0 kpa ; P₂^sat = 41.0 kpa.

2.   a. A binary mixture consists of acetonitrile (1) and nitromethane (2) which conform closely to raoult’s law. Vapor pressures for the pure species are given by the following antoine equations;

In(P₁^sat ,Kpa) = 2945.5t?C+224..0

In(P₂^sat ,Kpa) = 2972.6t?C+209.0

Determine the bubble point pressure and vapor composition for a mixture of composition X₁ = 0.6 at a temperature of 65?C.

     b. State the criteria for equilibrium for vapor -liquid composition.

     c. Given the excess Gibb’s free energy of a solution as :

GEX1RT = B( 1-X₁) find the activity coefficient expression arising out of the binary solution model .

1. Show whether these expressions satisfy the Gibb’s-Duhem equation.

At 30?C and 1 atm, the volumetric data for liquid mixtures of benzene (b) and

provide 5 ways/methods and explain them on how global warming can be reduced in the future?

Describe in 2-3 sentences about fundalmental analysis and techniqual analysis of forecasting

A piston-cylinder assembly has a liquid-vapor mixture of R-134a, with initial total mass of 3 kg, total volume of 0.12 m3 and a temperature of 10°C. The refrigerant then undergoes two processes in series: constant-temperature process followed by a constant- pressure process. At the end of the constant-pressure process, the pressure is 140 kPa and the R-134a is all saturated liquid. The constant temperature process is adiabatic while the constant-pressure process is not. Neglect kinetic and potential effects.

a. Solve for the initial quality of the liquid-vapor mixture of R-134a.

b. Determine the work and heat transfer for the constant-temperature process, in kJ.

c. Determine the work and heat transfer for the constant-pressure process, in kJ.

(a) A gas phase reaction, ? → ? is carried out in a packed bed reactor (ID = 0.8 m) containing Al2O3 catalyst. The catalysts were of spherical shape with a diameter of 6 mm. The reactant A was diluted with inert (70% inert) and fed to the reactor at 10 atm and 200 °C. The volumetric flow rate was varied from 5 - 15 m3 /s. It was assumed that the surface reaction and the external mass transfer influenced the overall conversion in the reactor. Compare the amount of the catalyst required to achieve 50% conversion under different flow rates.

(b) Estimate the weight of the catalyst to achieve 50% conversion when the reaction was carried out at 400 °C for the feed flow rate of 5 m3 /s.

Steam flows steadily through a turbine at a rate of 12,550 kg/h, entering at 7 MPa and 500oC, state 1 and leaving at 50 kPa as saturated vapor, state 2. The power generated by the turbine is 6.2 MW. Determine (a) the quality I % at the exit and (b) the heat transfer in kJ/sec with direction.

• Relate lunar phases to the positions of the Moon and Sun in the sky.
• Relate eclipses to the positions of the Earth, Moon, and Sun.
• Use Kepler's Laws to relate orbital speeds, periods, and distances.
• Use the gravity equation to compare the strength of gravitational forces.
• Relate the peak of a thermal radiation spectrum to temperature.
• Predict and interpret the effects of Doppler shift.
• Use the inverse square law equation to relate brightness and luminosity.
• Use magnitudes to describe brightness and color.
• Relate stellar properties and the OBAFGKM classification system.
• Read H-R diagrams for stellar temperatures, radii, and luminosities.
• Predict the ages of stellar clusters based on their color-magnitude diagrams.
• Identify the major steps of stellar evolution by name and on the HR diagram.
• Relate supernovae and compact objects to the stars that produce them.

Brazil's environmental record is a real paradox. On the one hand it resembles so many other countries desperately trying to get ahead economically - even at the expense of its environment. On the other hand, Brazil is showing the world how to reduce fossil fuel use with associated benefits (mostly) of using sustainable biofuels.

What do you make of this seemingly contradictory record on the environment and which path do you think Brazil is more likely to take in the future ... and why?

A010) One of the most active (and best studied) earthquake-prone areas is the San Andreas transform fault that forms a plate boundary between the North American Plate and the Pacific Plate. Turn on the San Andreas Major Ruptures folder to see rupture extents for three major earthquakes that have affected the San Andreas– Fort Tejon (1857, Mag. 7.9), San Francisco (1906, Mag. 7.8), and Loma Prieta (1989, Mag. 6.9). Also, in the Layers panel, turn on Gallery > Earthquakes.
   
Plate Boundary Earthquakes - San Andreas Fault, Wallace Creek, CA. What is the sense of offset along the San Andreas Fault? (i.e., Walk along either segment of Wallace Creek toward the fault. At the fault, determine the direction you turn to find the offset segment of the stream across the fault.)

A011) Plate Boundary Earthquakes - San Andreas Fault, Wallace Creek, CA. Use the Ruler tool to determine the distance (m) that Wallace Creek has been offset by recent motion along the San Andreas Fault (measure between the Problem 11 placemarks).

A012) Plate Boundary Earthquakes - San Andreas Fault, Wallace Creek, CA. Assuming that slip accumulates along the fault at about 6 cm/yr, how many years might it have taken to accumulate the slip that was released to produce the observed offset of the stream?

A015) Plate Boundary Earthquakes - San Andreas Fault, CA. Keep the San Andreas Major Ruptures folder turned on to show the extents of segments of the San Andreas Fault that have slipped during major seismic events. Using seismic gap analysis (where segments of a fault that have not recently slipped form "gaps" of accumulating strain transferred from adjacent slipped fault segments that highlight areas of greater potential for a "seismic" event), which placemark highlights a segment of the San Andreas Fault that has a high risk for an earthquake?

Question 13 options: