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2 years ago

Where are earthquakes and tsunamis more common and why?

2 answers:

7 0

Earthquakes are more common in some parts of the world than others, because some places, like California, sit on top of the meeting point, or fault, of two plates. ... When those plates scrape against each other and cause an earthquake, the results can be deadly and devastating. And then Tsunamis occur most often in the Pacific Ocean and Indonesia because the Pacific Rim bordering the Ocean has a large number of active submarine earthquake zones. However, tsunamis have also occurred recently in the Mediterranean Sea region and are expected in the Caribbean Sea as well.

Keith_Richards [23]2 years ago

4 0

Tsunamis are the largest waves in the world. The edges of the plates, where earthquakes and volcanoes often occur, usually lie near the edges of the oceans

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The black, granular material that fills a dry cell in a common flashlight (between the carbon rod and the zinc shell) is mangane

mestny [16]

Answer: c. +4

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

$Mn:25:1s^22s^22p^63s^23p^64s^23d^{5}$

$Mn^{4+}:21:1s^22s^22p^63s^23p^63d^1$

$O:8:1s^22s^22p^4$

$O^{2-}:10:1s^22s^22p^6$

Here manganese is having an oxidation state of +4 called as cation and oxygen forms an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged to give $Mn_2O_4$ which written in simplest whole number ratios to give neutral $MnO_2$

7 0

3 years ago

Which change of state is shown in the model?

Romashka [77]

I believe the change of state shown in the model is deposition.
Deposition is a process in which gases change phase and turns directly in solids without passing through the liquid phase. It is the opposite of sublimation.
One of the major difference between gases and solids is the distance between molecules; in gases the inter molecular spaces are large, while in solid they are very small, making solids be the most dense, with closely packed molecules. This is evident in the diagram, the phase changed from gases to solids.

5 0

2 years ago

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What is atomic mass of an element stands for

Dovator [93]

Mass is a basic property of matter and is made of atoms. Atoms are made of electrons, protons, and neutrons. Protons and neutrons make up the majority of the mass in an atom. Atoms may vary in the number of neutrons they have (called isotopes), and therefore the exact atomic mass may vary from atom to atom

3 0

2 years ago

If there is currently 50kg of U-235 present in Oklo, how much must have been present 750 million years ago when the reaction too

Viefleur [7K]

To answer this question, you need to know the concept of half-life, which is how a radioactive material decreases in mass over time.

The half life of U-235 is 703.8 million years. The first part of this problem is to find the scale factor. To do this, divide the time that has past by the half life, like this:

$\frac{750}{703.8} = 1.066$
Now, take this scale factor and multiply it by the current mass, like this:

$50 \times 1.066 = 53.3$
This number is what you add to the current mass to get the original mass. That is because the scale factor showed us that it was just over one half life. Since after one half life, the mass is cut in half, and this is over one half life, when we add to the original it will be a little over double. This equation illustrates the final addition:

$50 + 53.3 = 103.3$
I hope this helped you. Fell free to ask any further questions.

7 0

2 years ago

Ethan is investigating a snails response to stimuli. He put the following substances on each corner of a paper towel; syrup,lemo

olga nikolaevna [1]

There doesn't seem to be a clear answer, it is placed in the center when it's substances is on the corners it doesn't give anything else

4 0

2 years ago

Read 2 more answers