6. L’Oréal (a large multinational cosmetics manufacturer) has launched ‘Make-up Genius’ which is a smartphone app that allows consumers to see how L’Oréal cosmetics will look when applied to the customer’s face. Consumers can buy L’Oréal products directly from the app.

a) In general, what functions are performed by channel intermediaries?

b) Explain how the functions performed by channel intermediaries in the sale of cosmetics may change as a result of the introduction of this app.

c) Discuss the advantages and disadvantages to L’Oréal of this new product.

Liquid nitrogen and carbon dioxide can be used as a refrigerant in many food freezing applications. You are assigned by the project manager to investigate and report on the suitability of both liquid nitrogen and carbon dioxide in chilling meat products for the new frozen meat production line. In your report.

Explain the thermodynamics properties that allow nitrogen and carbon dioxide to function as a refrigerant in food freezing applications.

An open empty tank (filled with atmospheric air at 27oC and 100 kPa) is filled with liquid nitrogen as much as 14 kg quickly. After that, the tank is immediately closed and allowed to stand for a certain period of time. The tank is equipped with an open pipe manometer where the manometer fluid used is mercury (s.g. = 13.55). In the condition of the closed tank, the results of reading the manometer when it is constant shows that the difference in mercury surface height is 38 cm.

If it is assumed:
1. This system runs isothermal.
2. Nitrogen gas and air follow the ideal gas principle.
3. During the tank closing process, no nitrogen gas is lost.
4. Because liquid nitrogen intake and tank closure are fast, the volume of liquid nitrogen can be neglected meaning that at t = 0, the tank is considered to only contain air.

Therefore,
a. Determine the tank volume used!
b. Determine the number of moles of air in the tank!
c. Determine the specific gravity value of the gas mixture!

An incinarator with (0.5) inch steel walls in lined with (6) inch of firebrick to protect the steel and has (3.5) inch of magnesia insulation on the outside. When the gas temperature is (1550)°F, the inside wall of the firebrick is at (1250) °F as measured by an optical pyrometer.

Take thermal conductivities as below:
k_firebrick = 0.98 Btu/hr-ft°F , k_steel = 26 Btu/hr-ft°F, k_magnesia = 0.034 Btu/hr-ft°F.
Assume A = 1 ft² Assume the outside surface of magnesia is 120°F

(a) What is the total resistance?
R_Total =  °F hr/Btu

(b) What is the rate of heat transfer?
Q/A =  Btu/hr. ft²

(c) What is the temperature of the steel wall? (between fire brick and steel)
T =  °F

(d) How much insulation would be needed to raise the inside wall temperature to 1400. °F ?
The heat transfer rate Q/A would be slightly reduced, but assume it is unchanged.

x =  in

Example (8): A slurry containing 50 percent of the mass of solid materials with a density of 2,600 kg / m is filtered on a rotary cylinder filter, with a diameter of 2.25 m and a length of 2.5 m, which works with immersion of 35% of its surface in the slurry and under vacuum 600 mm Hg. A laboratory test on a slurry sample, using a 100 cm² paper filter and covered with a cloth identical to that used on a cylinder, produced 220 cm of filtration in the first minute and 120 cm of filter the next day a minute when the paper was under a vacuum of 550 mm Hg. The apparent density of the moist cake was 1600 kg / m and the filter density was 1000 kg / m3. Assuming the cake was not compressible and left 5 mm of cake on the cylinder, determine the theoretical maximum flow rate of the filter that could be obtained. What is the speed of the cylinder that will give the filter rate 80% of the maximum?

1. Suppose it’s warm and raining outside in Big Town. A cold front will pass Big Town in 3 hours. Behind the front, it is cold and snowing.
   1. Make a persistence forecast for Big Town, 6 hours from now.

2. Would you expect this forecast to be correct? Explain.

3. Now, make a forecast for Big Town using the steady-state forecasting method.

13. The observation of what overall characteristic of the CMBR left, "... no real doubt we are seeing the residual radiation left behind from the hot, dense beginning of the early universe."

14. The tiny fluctuations in the early universe due to gravity redshifts from concentrations of mass eventually led to what?

16. List two processes or events that formed the elements heavier than helium: a) those that make carbon, nitrogen, and oxygen, and b) those that make iron, nickel, gold, and even heavier elements.

17. The discovery of what aspect of the Universe restores Einstein’s “biggest blunder” (his fudge factor in his equations) to general relativity

An insulated stream of warm water is produced in a steady flow mixing process by combining 1 kg/s of cold water at 25 oC with 0.8 kg/s of hot water at 75 oC. What is the temperature of warm-water stream ? what is the work of the mixing process, , and ? assume the specific heat of water is constant at 4.18 kJ/kg.K.

• If the amount of gas increases, but the pressure and temperature stay fixed, what happens to the volume? What is the relevant gas law?

2. What is the Neolithic Demographic Transition (NDT)? Explain what happened, why it happened, and how it is connected to the Neolithic Revolution.

Hi! I have some geology ?'s:

23. To account for the incredible distances traveled by some of the Columbia River Flood Basalts to reach the Pacific Coast, possible explanations include which of the following (more than one answer is recommended):

A. the pre-existing uniform gradual slope toward the Pacific Coast all across Oregon and Washington from their eastern borders to the ocean.

B. the initial high temperature of the lava from these eruptions.

C. the low viscosity of the lava from these eruptions.

D. the filling in of low topography by early flows, flattening the landscape for later flows.

E. solidifying and crusting over of the upper surface of flows, providing insulation to maintain high temperature and low viscosity of flows over great distances.

F. volcanic vents providing freshly erupting lava all along the Columbia River to the ocean.

G. the Oregon coast was much further east at the time of these eruptions, making the journey actually far shorter than it appears today.

24. The methods of monitoring used by USGS volcanologists to accurately predict the 1991 eruption of Mt Pinatubo in the Philippines and save thousands of lives included which of these:

A. seismometers revealing subterranean magma movements


B. sonar measuring tectonic ground movements


C. GPS to figure out where they actually were

D. watching snakes, frogs, chickens, and pigs


E. visual monitoring by flyovers to inspect lava effusions


F. gas spectrometers to measure volcanic de-gassing

G. satellite data to detect thermal anomalies