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Nady [450]
4 years ago
14

A solution with a pH of seven must be A. An acid B. A base C.neutral D.water

Physics
1 answer:
Dmitry [639]4 years ago
7 0
A pH scale goes from 0 - 14.
7 is in the middle so it is neutral
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Which of the following correctly describes the importance of demonstrations to scientific investigation?
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A- A demonstration shows how something works, often including models

Explanation:

A demonstration allows, through experimentation, to show how nature works and in that way can include the explanation of scientific theories that explain the set of observed facts, that is, it serves as a demonstration of the underlying scientific principles.

5 0
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A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surfac
matrenka [14]

Answer:

a) 6.1 m

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Explanation:

a) The wave length is the distance between 2 crests λ = 6.1m

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4 0
3 years ago
If a crane worker lifts a crate with a mass of 250 kg from the ground to a
mina [271]

D.

The gravitational of a body is possessed by the body due to the virtue of its position.

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Substituting the values

196*9.8*250= 49k

7 0
2 years ago
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