Geographically, a shield and a surrounding platform together are _______________.a. a low-lying region where Precambrian rocks crop out
b. a low-lying region where Precambrian rocks are covered by Phanerozoic sedimentary strata
c. a region of compressed rock located behind a volcanic arc at a convergent continental margin
d. synonymous with craton

Answers

Answer 1

Answer:

Answer:

The correct answer is D. Synonymous with craton

Explanation:

Craton is referred to as a large immobile block of earth crust composed of ancient crystalline basement rock and have deep lithosphere roots that extends deeply into the earth's mantle.

Cratons are often seen as shields because the basement rock crops out at the surface, and in platforms, the basement is overlaid by sedimentary rock.

Geographically, a shield and a surrounding platform together are synonymous with craton.

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Please help with this question for wastewater treatment, I can't figure out what formulas to use!Calculate the pounds of solids under aeration of the given plant:

Influent BOD: 310 mg/l

Influent TSS: 210 mg/l

Aerbay: 110' x 15' x 12 feet deep (operating level of the tank is 10')

Aerbay MLSS (mixed liquer suspended solids) 2,800 mg/l

Effluent BOD: 2.5 mg/l

Effluent TSS: 1.5 mg/l

Answers

Answer:

2884.17 lbs

Explanation:

Data provided:

Influent BOD = 310 mg/l

Influent TSS = 210 mg/l

Dimensions of Aerbay = 110' × 15' × 12'

Operating level of the tank = 10'

thus,

The operating volume of aerbay = 110 × 15 × 10 = 16500 ft³

also,

1 ft³ = 7.48052 gallons

Thus,

16500 ft³ = 16500 × 7.48052 gallons = 123428.58 gallons

Now,

Aerbay MLSS (mixed liquor suspended solids) = 2,800 mg/l

Therefore,

Pounds of solids under aeration

= Operating volume of aerbay × concentration of aerbay MLSS

also,

1 mg/L = 8. 3454 × 10⁻⁶ lbs/gallon

thus,

Pounds of solids under aeration

= 123428.58 gallons × ( 2800 × 8. 3454 × 10⁻⁶ lbs/gallon )

= 2884.17 lbs

What do you observe happens when a p wave travels from a solid to a liquid?

Answers

1- It depends on the incident angle at which the P-wave hits the liquid. Using snells law, a portion of the energy is converted to an S-Wave, a portion of it ir reflected, but the majority of the energy just disappears ( it is absorbed into the liquid ) since P-waves do not travel through liquids.2- it spreads out making the sound travel faster than it does in air3- P-waves move up and down4- S-waves move side to side5- P-waves are pressure waves, or longitudinal waves. The motion is in the direction of the wave. These waves travel through solids and liquids.S-waves are shear waves, or shaking waves. The motion is perpendicular to the wave direction. These waves cannot travel through liquids.An earthquake produces both P and S waves and by monitoring the arrival (or non-arrival) of P and/or S waves around the Earth we can infer a liquid component to the core.

Please help with this question for homework!!!!

Answers

Answer:

i am not sure but i think it is the third option

Explanation:

sorry if it was wrong

Whats the difference between an air mass and a front?

Answers

Explanation:

An air mass is a body of air with a relatively constant temperature and moisture content over a significant altitude. Air masses typically cover hundreds, thousands, or millions of square kilometers. A front is the boundary at which two air masses of different temperature and moisture content meet.

Description of location cracks in rocks

Answers

Answer:

A fracture is any separation in a geologic formation, such as a joint or a fault that divides the rock into two or more pieces. A fracture will sometimes form a deep fissure or crevice in the rock.

Explanation:

Can you specify your question

Cracks can be defined as fractures typicallcaused from pressure I believe

On the northern hemisphere's summer solstice, areas above arctic circle are completely within the circle of illumination. question 8 options: a. True
b. False

Answers

the correct answer to the question is true

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