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3 years ago

Describe the sequence of events in the lithification of a sandstone

2 answers:

6 0

Lithification is a diagenetic process in which loose sediment is converted to hard rocky compaction and cementation. So sediments (sand) are buried the increase in pressure from the weight of the overlaying material pushes the grains closer together. The volume of sediment is reduced and the fluids between the grains are also squeezed out. This leaves the sandstone tightly compressed together this is lithification.

Strike441 [17]3 years ago

5 0

<h3>Answer and explanation;</h3>

Lithification refers to the process that involves compacting, sedimentation and cementing of the mass together under pressure to create a sand stone, a form of sedimentary rock.
Weathering and erosion of rocks creates sediments which collect and are then moved to another location.
At some point the sediment may become heavy for the agent such as water to carry and thus deposited. As this deposit thickens, it becomes heavier and thus lithification process start.
Compaction forces the grains of the deposited sediments closer together, forcing out air and water.
As a result of compaction the sediment's pores becomes smaller. Minerals deposit in these pores as the water squeezes out. As the water moves out the pressure increases, the mineral deposits start hardening thus cementing the entire mass and this results to a sand stone.

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~~~NEED HELP ASAP~~~ Please solve each section and show all work for each section.

anastassius [24]

Explanation:

Forces on Block A:

Let the x-axis be (+) towards the right and y-axis be (+) in the upward direction. We can write the net forces on mass $m_A$ as

$x:\:\:(F_{net})_x = f_N - T = -m_Aa\:\:\:\:\:\:\:(1)$

$y:\:\:(F_{net})_y = N - m_Ag = 0 \:\:\:\:\:\:\:\:\:(2)$

Substituting (2) into (1), we get

$\mu_km_Ag - T = -m_Aa \:\:\:\:\:\:\:\:\:(3)$

where $f_N= \mu_kN$ , the frictional force on $m_A.$ Set this aside for now and let's look at the forces on $m_B$

Forces on Block B:

Let the x-axis be (+) up along the inclined plane. We can write the forces on $m_B$ as

$x:\:\:(F_{net})_x = T - m_B\sin30= -m_Ba\:\:\:\:\:\:\:(4)$

$y:\:\:(F_{net})_y = N - m_Bg\cos30 = 0 \:\:\:\:\:\:\:\:\:(5)$

From (5), we can solve for N as

$N = m_B\cos30 \:\:\:\:\:\:\:\:\:(6)$

Set (6) aside for now. We will use this expression later. From (3), we can see that the tension T is given by

$T = m_A( \mu_kg + a)\:\:\:\:\:\:\:\:\:(7)$

Substituting (7) into (4) we get

$m_A(\mu_kg + a) - m_Bg\sin 30 = -m_Ba$

Collecting similar terms together, we get

$(m_A + m_B)a = m_Bg\sin30 - \mu_km_Ag$

$a = \left[ \dfrac{m_B\sin30 - \mu_km_A}{(m_A + m_B)} \right]g\:\:\:\:\:\:\:\:\:(8)$

Putting in the numbers, we find that $a = 1.4\:\text{m/s}$ . To find the tension T, put the value for the acceleration into (7) and we'll get $T = 21.3\:\text{N}$ . To find the force exerted by the inclined plane on block B, put the numbers into (6) and you'll get $N = 50.9\:\text{N}$

8 0

3 years ago

Scientific knowledge is both long lasting and open to change. In your own words, explain why scientific knowledge should be re-e

Nostrana [21]

Science is open to change because scientists agree that there are no absolute truths, only the best explanations for the data
there are specifically two cases when science can change: -new data is discovered (for example new skeleton makes us revise the known history of homo species)
-a new model is proposed that fits the data better (such as the heliocentric model of Copernicus)

7 0

3 years ago

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seagull is flying at a rate of 20 miles per hour south, it encounters wind blowing 20 miles per hour north. What is the resultan

KiRa [710]

Answer:

the winds will make the bird stop

Explanation:

is basically 20 - 20

8 0

3 years ago

What type of seismic waves travel through Earth?

ycow [4]

Answer:d. Ground waves

Explanation:A P-wave is one of the two main types of seismic waves. P-waves travel faster than other seismic waves and hence are the first signal from an earthquake to arrive at any affected location or at a seismograph

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3 years ago

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A lever has a mechanical advantage of 1.6. If you apply a force of 330 N to the lever, how much force does the lever apply to th

iragen [17]

Use the formula for mechanical advantage of simple machines. As for a lever, use formula below
mechanical advantage = force output/force input
where
Force input = 330 N
mechanical advantage = 1.6
substitute all the given data, we will get Force output
Force output = 528 N

4 0

3 years ago