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lakkis [162]
3 years ago
11

True or False: A change of 1 pH unit represents a tenfold change in the acidity of the solution.

Physics
1 answer:
alisha [4.7K]3 years ago
7 0

Answer:

I was also going to ask same question edited:ok i found its true

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Is Algae Biotic or Abiotic?
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what is an example of a environmental issue and how was it impacted by humans. please explain in detail where this issue is occu
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8 0
3 years ago
2. A woman prevents a 3kg brick from falling by pressing it against a vertical wall. The coefficient of friction
Anettt [7]
<h3>Answer:</h3>

49 N

<h3>Explanation:</h3>

<u>We are given;</u>

  • Mass of the brick as 3 kg
  • The coefficient of friction as 0.6

We are required to determine the force that must be applied by the woman so the brick does not fall.

  • We need to importantly note that;
  • For the brick not to fall the, the force due to gravity is equal to the friction force acting on the brick.
  • That is; Friction force = Mg

But; Friction force = μ F

Therefore;

μ F = mg

0.6 F = 3 × 9.8

0.6 F = 29.4

      F = 49 N

Therefore, she must use a force of 49 N

6 0
3 years ago
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