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4 years ago

Which process is a form of mechanical weathering?

2 answers:

8 0

Mechanical weathering is actually breaking down of rocks into smaller pieces by natural forces. Any weathering processes that can cause the physical breakdown of rocks without any type of change in the chemical composition of rocks, called mechanical weathering.

So, looking at each of the definitions in the options, we can easily choose:
1. Hydration : It's a process of absorbing water by substance.

2. Carbonation: It's a process of Carbon Dioxide dissolving in liquid (mostly water).

3. Oxidation : It's a process of oxygen reacting with some element.

4. Exfoliation: It's a process where the rocks erodes by peeling off in sheets or layer by layer rather than grain by grain.

As you can see the last one Exfoliation matches with the definition of mechanical weathering. It's one of its types.

Anuta_ua [19.1K]4 years ago

7 0

Answer:

thermal expansion

Explanation:

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Assume that the temperature, 40C, and volume of the gas, 6 liters, remain constant. At 2 atmosphere of pressure, there are 0.036

MAVERICK [17]

Answer:PV=nRT

Ideal gas equation

Explanation:

PV=nRT

Ideal gas equation

7 0

4 years ago

In the film, 2001: A Space Odyssey, astronauts travel through space and experience artificial gravity created by a spinning, cyl

katrin2010 [14]

Artificial gravity is created by rotating the cylinder

So here we can say that the acceleration is due to centripetal acceleration

So here we know that the formula of centripetal acceleration is given by

$a_c = \frac{v^2}{R}$

so here we know that

$a_c = 9.8 m/s^2$

$v = 30.9 m/s$

now we will plug in all values

$9.8 = \frac{30.9^2}{R}$

$R = \frac{30.9^2}{9.8}$

$R = 97.43 m$

So above is the radius of the cylinder

Now to find the diameter

$d = 2R$

$d = 2*97.43$

$d = 194.8 m$

so its diameter is 194.8 m

4 0

3 years ago

A stereo speaker is placed between two observers who are 35 m apart, along the line connecting them. If one observer records an

kompoz [17]

Answer:

x = 2,864 m , Ra = 32.1 m

Explanation:

Let's solve this problem in parts, let's start by finding the intensity of the sound in each observer

observer A β = 64 db

β = 10 log Iₐ / I₀

where I₀ = 1 10⁻¹² W / m²

Iₐ = I₀ 10 (β/ 10)

let's calculate

Iₐ = 1 10⁻¹² (64/10)

Iₐ = 2.51 10⁻⁶ W / m²

Observer B β = 85 db

I_b = 1 10-12 10 (85/10)

I_b = 3.16 10⁻⁴ W / m²

now we use that the emitted power that is constant is the intensity over the area of the sphere where the sound is distributed

P = I A

therefore for the two observers

P = Ia Aa = Ib Ab

the area of a sphere is

A = 4π R²

we substitute

Ia 4pi Ra2 = Ib 4pi Rb2

Ia Ra2 = Ib Rb2

Let us call the distance from the observer be to the haughty R = ax, so the distance from the observer A to the haughty is R = 35 ax; we substitute

Ia (35 -x) 2 = Ib x2

we develop and solve

35-x = Ra (Ib / Ia) x

35 = [Ra (Ib / Ia) +1] x

x (11.22 +1) = 35

x = 35 / 12.22

x = 2,864 m

This is the distance of observer B

The distance from observer A

Ra = 35 - x

Ra = 35 - 2,864

Ra = 32.1 m

8 0

3 years ago

What will most likely happen with bar magnets aligned NS NS

likoan [24]

Answer:

repel

Explanation:

8 0

3 years ago

How does the current in a circuit change if the resistance is doubled? The current is halved. The current is doubled. The curren

Inessa05 [86]

Answer:

The current is halved

Explanation:

The relationship between the current and the resistance is given by Ohm's Law, as follows:

$V = IR\\I = \frac{V}{R}$

where,

V = Voltage

I = Current

R = Resistance

Therefore, if we double the resistance:

$I' = \frac{V}{2R}\\\\I' = \frac{1}{2}I$

Hence the correct option is:

The current is halved

7 0

3 years ago

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