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AlexFokin [52]
3 years ago
7

Why earth not flat and why we live in this country not yours

Chemistry
1 answer:
bagirrra123 [75]3 years ago
5 0

Answer:

Earth is not flat because the spheroidical shape provides a more effective shape in terms of exposed surface area for absorbing and radiating radiation, and also for a relatively more uniform gravity pull on different points on its surface which might not be so for a flat surface.

You live in your country, not mine because you have evolved over time to be more adapted to living in your own kind of envoirment. Members of a certain species (like you and me as humans) have been spread to maximize the survivability of their species compared to if they were clustered to a particular place.

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Match the separation techniques with the correct descriptions.
nordsb [41]

Answer:

Explanation:

1 = A

Sublimation is the process where by a sample is heated to pass through solid phase to gaseous phase without the intermittent liquid phase. Example of substance that sublime is camphor.

2 = D

Decantantion

5 = F

Filtration is the process a liquid from solid using a porous material. This technique requires a set up and a good porous material eg filter paper.

6 = B

This technique is to separate a mixture of solids by converting them from solid phase to gaseous phase since they sublime.

3 = deposition.

The answer isn't in the option but deposition is the process of substance in gaseous phase to change into solid state without passing through liquid phase. Deposition is the opposite of sublimation.

4 = E

4 0
3 years ago
Which of the following statements explains how the fossil record provides evidence that evolution has occurred?
olasank [31]
I think it will be letter A tbh
Hope this helps you out
7 0
3 years ago
Each of the following reactions is incomplete. Match each of the following particles with the correct reaction in order to compl
kiruha [24]

Answer:

1. Option A. Beta decay minus 0 -1e

2. Option B. Alpha 4 2He

3. Option A. Beta decay minus 0 -1e

Explanation:

1. 66 29Cu is undergoing beta decay minus since it produces a daughter nuclei having the same mass number and the atomic number increased by 1 i.e 66 30Zn

2. 238 92U is undergoing alpha decay since the daughter nuclei produced has a decrease of 4 in the mass number and a decrease of 2 in the atomic number ie 234 90Th

3. 14 6C is undergoing beta decay minus since the daughter nuclei produced has the same mass number and the atomic number increased by 1 i.e 14 7N

Please see the attached photo for more details

4 0
3 years ago
Students in Mr. Brant's class designed an experiment to test which baseball bat will hit the ball the longest distance? In this
Mama L [17]
Answer is d.A baseball helmet
8 0
3 years ago
2. Explain why atoms of the same element are not all identical.
GarryVolchara [31]
They are not always identical because they have different isotope numbers which develops different neutrons numbers
6 0
3 years ago
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