Answer:
I don't see a diagram so I am just gonna guess
Explanation:
I believe that the sample at location (E) is older. This is because it would be more down stream so I was at location (A). Where as the rock at location (A) is newer because its more up stream.
Answer : Option C) A meltdown.
Explanation : When a nuclear fission reaction is conducted, and if it loses its control it will produce many neutrons which will be difficult to bring under control; for this purpose the nuclear reactors are built with the control rods which absorb the extra neutrons and help the reaction to be in control.
If this is not done, it may result in complete meltdown of the reactor as neutrons have high energy in them.
The number is written in scientific notation.
The significant figures are the numbers known precisely plus 1 digit that is uncertain.
When the numbers are expressed in scientific notation all the digits before 10^n are significant.
So, 7 and 8 are significant figures and the answer is that the number of significant figures is 2.
Answer: 2
Explanation:
Question 1:
In a chemical change involves the rearrangement of atomic entities that makes up a compounds.
- Chemical change is a change in which new kinds of matter is formed. It is always accompanied by energy changes.
- Chemical changes are not easily reversible.
- They lead to the production of new kinds of matter.
- They require a considerable amount of energy.
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Question 2
Physical changes are changes that alters the physical properties of matter.
- This kind of change is easily reversible.
- It leads to the production of no new kind of matter
- It requires little energy change
Example is soaking paper in water, dissolution of salt in water e.t.c
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Question 3:
To large extent, all physical changes are reversible. But some are not easily reversible.
- For exampe, sawdusts derived from grinding wood cannot be assembled together to give back the original lump of wood.
- Some physical changes like change of state are easily reversible.
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Question 4:
An example of chemical change in my every day life is the use of cooking gas. The combustion of gas to liberate heat energy for cooking is a chemical change.
- The gas which is a hydrocarbon on combustion produces carbon dioxide and water with the release of energy.
- I cannot assemble these materials to form back the gas.
- This is a chemical change.
- New kinds of products also forms like the carbon dioxide which is different from the hydrocarbon I burnt.
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combustion brainly.com/question/11200282
Explanation:
Earthquakes usually occur where two plates are running into each other or sliding past each other. Figure 1 - An image of the world's plates and their boundaries. ... Faults are caused by all that bumping and sliding the plates do. They are more common near the edges of the plates.