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Mrac [35]
2 years ago
5

Q16.A needle can be made to "float" on the surface tension of water. What causes this surface tension to form?

Biology
1 answer:
Sunny_sXe [5.5K]2 years ago
6 0

Answer:

B

Explanation:

Water has surface tension due to cohesion that allows it to 'stick' together. This cohesion is created by the fact that water is polar and has unequal distribution of charges. The oxygen becomes slightly negative as it is surrounded by positive hydrogen. In turn, the hyrdogen becomes slightly positive.

This means that the hydrogen molecule is temporarily attracted to the oxygen of another molecule. This causes surface tension and allows light objects to float on top of it

Hope this helps!

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i beleve it would be 700 newtons

Explanation:

6 0
3 years ago
“Heredity and environment play an important role in determining human development and behavior”.
vovikov84 [41]

Answer:

Heredity is a term that refers to something we have gained from our parents, they can be some physical traits like appearance or behavioral traits like generosity, ethics etc.

When we talk about development of an individual, science has proved that both heredity and environment play a crucial role. There is no doubt that certain things are predetermined in our genetic make up like our height, weight and complexion etc but there are several ways in which environment influences and modifies those traits.

Let's take some examples:

  • A kid is born in Africa whose parents inherited just appropriate and ideal height and intelligence to him, But he was surrounded by the conditions where he could not get sufficient food , minerals and nutrients that hindered  not only his physical growth and development but his intelligence level did not reach that potential too that was predetermined in  his genes. So, we can say that environment influenced the kid and modified the traits he inherited from parents.
  • Similarly, there are many boys that inherit fair complexions from their parents but they have a lot of sun exposure due to out door sports and activities. So, parents observe that after teens their complexion is getting towards darker tone although in preadolescence they were just as fair as other siblings. This is proven by studies that sun exposure turns the skin tan and darker than original tone.

Therefore, we can say that both Heredity and environment play an important role in determining human development and behavior.


Hope it help!

5 0
3 years ago
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il63 [147K]

The answer is C) C6H12O6 + 6O2 → 6CO2 + 6H2O

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4 0
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If moose were to go extinct, what would be the two most likely effects on the ecosystem?
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Answer:

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The national environmental policy act requires the federal government to
SVEN [57.7K]

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use all practicable means to create and maintain conditions under which man and nature can exist in productive harmony

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