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nordsb [41]
3 years ago
15

The table below shows the pH of four body fluids and the resulting color when each

Physics
1 answer:
sladkih [1.3K]3 years ago
7 0

Answer:

Gastric juice is an acidic substance ( Strongly acidic)

Explanation:

According to the table shown in the question:

  • Gastric juice turns blue litmus paper to red
  • It is neutral to red litmus

Note: Any substance that turns blue litmus paper red and is neutral to red litmus paper is an acidic substance.

Moreover, gastric juice is a combination of Pepsin and HCl and it has a PH that varies between 1 and 3. This PH is typical of a strongly acidic substance.

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Two major characteristics that change when air is heated and cooled is the density and the direction of the air flow. They change the movement of the air by heated air rises and cooled air doesn't. 
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Which of the following objects have kinetic energy?
Montano1993 [528]
I think the Answer is A (An elephant walking 1.5 m/s along the ground), and B (A jet flying across the sky 4,000 m above the ground.
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Light incident upon a pane of glass slows down in passing through the glass, Does it emerge at a slower speed or at its initial
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Answer:

It will emerge at its initial speed not a slower speed.

Explanation:

It will emerge at the initial speed because the medium at the point of emergence is the same as the medium before incidence.

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when a cup of hot chocolate cools from 90c to 80c which of the following is happening to the molecules of the liquid
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I think that the liquids molecules are slowing down. Hope this helps!

Explanation:

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7 0
3 years ago
While Robert was helping his father in the garden, he pushed a shovel into the ground to dig a hole in the dirt. He picked up a
makvit [3.9K]

Work done is given by the change in kinetic energy of an object

  • The kinetic energy of the shovel, the shrub, and in Robert's movement were changed, therefore, work is done in the given processes,

Reason:

Work is done when the total energy of object is affected by the application of force on the object over a distance

Therefore;

  • In option <em>A</em>, pushing the shovel into ground (to dig out the dirt) the requires the application of a force (push) over a distance, (into and out of the ground) therefore work is done
  • In option <em>B</em>, picking the shrub up gives it gravitational potential energy, therefore, work is done
  • In option <em>C</em>, carrying the shrub to the hole does visible work
  • In option <em>D</em>, holding the shrub while lowering it into the hole does work by preventing the shrub from falling randomly

Therefore, <u>work is done in the given processes</u>

Learn more about work-energy theorem here:

brainly.com/question/10063455

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2 years ago
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