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3 years ago

Which of the following is likely to be found in placer deposits?

2 answers:

8 0

<span>Gold is most likely to be found in placer deposits. In geology, a placer store or placer is a type of deposit that is a collection of profitable minerals shaped by gravity partition amid sedimentary procedures. The name is from the Spanish word placer, signifying "alluvial sand". Placer gold deposits represent the most attractive targets for small-scale miners.</span>

aleksandrvk [35]3 years ago

5 0

The answer to your question is b gold

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2 1. Scattering cross-section of acrosol particles is 2.5E-12 m , absorption cross-section is 0.45E- .2 12 m Concentration of pa

Alona [7]

Answer:

$T = 3.23 \times 10^{-83}$

Explanation:

thickness of aerosol layer is 2.5 km

zenith angle is 40 degree

we know that

$\tau = \epsilon_{ext} . h$

where

$\epsilon_{ext} = N.\sigma_{ext}$

$\epsilon_{ext}$ is extinction coefficient

$\sigma_{ext}$ extiction cross section

N = Concentration

$\sigma_{ext} = (2.5 + 0.45)\times 10^{-12} m^2$

$= 2.95 \times 10^{-12} m^2$

$\epsilon_{ext} = 2\times 10^7 \times 2.95 \times 10^{-12} m^2 \times m^{-3}$

$= 5.9 \times 10^{-5} m^{1}$

$\tau = 5.9 \times 10^{-5} m^{-1} \times 2.5\times 10^3 m$

$= 14.75\times 10^{-2}$

transimiitance $T = e^{\frac{-\tau}{\mu}}$

$T = e^{\frac{- 14.75 \times 10^{-2}}{cos 40}}$

$T = 3.23 \times 10^{-83}$

6 0

3 years ago

What measures does San Fransisco have in place to prevent earthquake damage?

MariettaO [177]

Answer:

As San Francisco and other cities in the Bay Area commemorate the anniversary of the 1989 Loma Prieta earthquake, we are reminded once again of the need to get prepared for the next natural disaster. The 6.9 magnitude earthquake not only resulted in collapsed homes, displacement of residents, but it also was a terrifying reminder of the need to reinforce the structures we use every single day.

I hope this helped, have an awesome day!

7 0

3 years ago

What incident led to the beginning of the Korean War?

Rina8888 [55]

Answer:

the Korean War began in 1950 when North Korean communist Army came into the 38th parallel and invaded non-communist South Korea.

Explanation:

so the main reason that this war happened was because of the spread of Communism during the Cold War and Japanese Occupation of Korea during World War II

(have a great day!)

4 0

2 years ago

Read 2 more answers

Which of the following processes most likely played the greatest role in the formation of the famous “Blue Caves” in Greece?

podryga [215]

Answer:

Water Erosion

Explanation:

The "Blue Caves" in Greece are a series of sea caves, also known as a littoral caves. Littoral caves are shaped primarily by wave action in the form of water erosion.

3 0

3 years ago

Write the physical meaning of molar gas constant(R)

solmaris [256]

Answer:

i hope it helps and my dear this is a chemistry question

Explanation:

The gas constant (also known as the molar gas constant, universal gas constant, or ideal gas constant) is denoted by the symbol R or R. It is equivalent to the Boltzmann constant, but expressed in units of energy per temperature increment per mole is know as molar mass

7 0

3 years ago