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3 years ago

Compare and contrast the lithosphere and the asthenosphere(3 different 2 similarities)

1 answer:

8 0

Before comparing and contrasting these layers of Earth, we first define what lithosphere and asthenosphere are.

Lithosphere primarily consists of the outermost layers of the Earth, which are the crust and the uppermost portion of the mantle. Simply, the ground you stepped on is part of earth's lithosphere. On the other hand, asthenosphere comprises of hot and partially molten rock just located at the upper portion of the mantle but just below the lithosphere. Both have similarities and differences, which are as follows:

SIMILARITIES:
- Both are the passageways of earthquakes P-waves (Primary waves) just before it reaches the earth's surface.
- Both are made of the same material (Silicon oxide rocks, which are rich in iron and magnesium)

DIFFERENCES:
- Rocks in lithosphere can bend (it deforms, resulting in fault formations), however, rocks in the asthenosphere, not only bend but also flow (plastic in nature).
- Lithosphere has relatively low temperatures compared to asthenosphere.
- Due to its depth, pressure against rocks in asthenosphere is comparatively higher compared to lithosphere.

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Give the number of protons (p), electrons (e), and neutrons (n) in one atom of nickel-62. A) 28 p, 28 e, 28 n B) 28 p, 28 e, 34

Reika [66]

<h2>Option B is the correct answer.</h2>

Explanation:

We need to find number of protons, electrons and neutrons in ⁶²Ni

Mass number is 62.

That is

Number of proton + Number of neutron = 62

We know that number of proton = 28 for nickel

28 + Number of neutron = 62

Number of neutron = 62 - 28 = 34

We also know

Number of protons = Number of electrons

Number of electrons = 28

Option B is the correct answer.

3 0

3 years ago

A 60kg60 kg board that is 6 m6 m long is placed at the edge of a platform, with 4 m4 m of its length extending over the edge. Th

scoundrel [369]

Complete Question

The complete question is shown on the first and second uploaded image

Answer:

The minimum mass of $M_1 = 90\ kg$ correct option is E

Explanation:

Free body diagram of the set up in the question is shown on the third uploaded image

The mass of board is $M = 60kg$

The length of the board is $L = 6 \ m$

The length extending over the edge is $L_e = 4 \ m$

The second mass is $M_2 = 30kg$

Now to obtain $M_1$ we take moment about the edge of the platform

$M_1 g L_1 = Mg \frac{L}{2} + M_2 g L_2$

$M_1 L_1 = M \frac{L}{2} + M_2 L_2$

Substituting value

$M_1 (2) = (60)(1) + (30)(4)$

$M_1 = 90 \ kg$

8 0

4 years ago

Your friend says the following to you: "The lungs are the main

posledela

The respiratory system is made up of multiple organs, saying that the lungs is the only required organ is very wrong. While the lungs are probably the most important part of it, the organs that transfer the air are definitely necessary for everything to work.

The main organ that is needed for air to flow from the mouth to the lungs is the trachea, or the windpipe. This connects the back of the mouth to the lungs, without this, no air could get into the lungs, thus rendering them useless.

7 0

4 years ago

A neutron in a nuclear reactor makes an elastic head-on collision with the nucleus of a plutonium atom initially at rest. (a) Wh

olga55 [171]

Answer:

Fraction = 59049/60025

Explanation:

Let m be the mass of the neutron and M be the mass of the plutonium nucleus (at rest)

Now, formula for kinetic energy before collision is;

K_i = ½mu²

Formula for kinetic energy after collision is;

K_f = ½mv²

Where;

u is the velocity of the neutron before collision

v is the velocity of the neutron after collision.

From collision principle where momentum before collision equals momentum after collision, we can say that;

(m - M)u = (m + M)v

Thus,

v = [(m - M)u]/(m + M)

Putting [(m - M)u]/(m + M) for v in the final kinetic energy equation gives;

K_f = ½m([(m - M)u]/(m + M))²

K_f = ½mu²((m - M)²/(m + M)²)

To get the fraction of the neutron's kinetic energy is transferred to the plutonium nucleus, it is simply;

K_f/K_i = [½mu²((m - M)²/(m + M)²)]/½mu²

This gives;

K_f/K_i = ((m - M)²/(m + M)²)

But mass of plutonium = 244m

Thus;

K_f/K_i = ((m - 244m)²/(m + 244m)²)

K_f/K_i = 59049m²/60025m²

K_f/K_i = 59049/60025

4 0

3 years ago

An infinitely long cylinder of radius R has linear charge density λ. The potential on the surface of the cylinder is V0, and the

tamaranim1 [39]

Answer:

V = V_0 - (lamda)/(2pi(epsilon_0))*ln(R/r)

Explanation:

Attached is the full solution

5 0

3 years ago