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Gekata [30.6K]
3 years ago
10

A carpenter uses a saw to cut a wooden board into two different sized pieces. Which of the following physical properties is most

Chemistry
2 answers:
never [62]3 years ago
8 0
I think it’s weight but I’m not fully sure
antiseptic1488 [7]3 years ago
4 0
D because density donst change
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During which two minutes time period is the temperature of water changing faster?!
Vlad1618 [11]

Answer:

2-4 minutes

Explanation:

Fastest changing temperature means larger change in temperature when subtracting final temperature from initial temperature in a given time period (given time period is 2 minutes for all the options)

For 0-2 minutes, our final temperature was 40 (at 2 min) and initial temperature was  20 (at 0 min), thus temperature change was only 20 C.

For 2-4, our final temperature was 80 (at 4 min) and initial temperature was   40 (at 2 min) thus temperature change was 40 C.

For 4-6, our final temperature was 100 (at 6 min) and initial temperature was   80 (at 4 min) thus temperature change was 20 C.

We are not given temperature at 8 min so option D is invalid.

As we can clearly see that in a given 2 minute period, option B has the fastest change because it changed 40C when compared to other options that changed only 20C from starting temperature.

Hope that makes sense.

4 0
2 years ago
Enter the formula for the compound cobalt(II) phosphate. Express your answer as a chemical formula.
alexira [117]

Answer:

Co_3(PO_4)_2

Explanation:

Naming of the ionic compounds:-

  • The name of the cation is written first and the the name of the anion is written after the name of the cation separated by single space.
  • The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.
  • In case of transition metals, the oxidation state are written in roman numerals in bracket in front of positive ions.

Hence, given ionic compound:-

Cobalt(II) phosphate

So, Cobalt will have a positive charge of +2

Phosphate is PO_4^{3-}

So, the formula is :-

Co         PO_4^{3-}

2                    3

Co_3(PO_4)_2

5 0
3 years ago
what carboxylic acid describes this? have a long chain of carbons with hydrogen attached to each one. The end carbon has a hydro
bekas [8.4K]
I think the answer would be fatty acids
5 0
3 years ago
What is the minimum (non-zero) thickness of a benzene (n = 1.501) thin film that will result in constructive interference when v
ad-work [718]

Explanation:

At each reflecting surface (benzene and glass) there will be 180 degree phase change.

Now, for constructive interference the optical path in benzene is \lambda.

Formula to calculate thickness of a benzene thin film is as follows.

     Optical path length through benzene (\lambda) = 2 \times n \times d

Hence, substituting the given values into the above formula as follows.

    Optical path length through benzene = 2 \times n \times d

                   d = \frac{\text{Optical path length through benzene}}{2 \times n}

                       = \frac{\lambda}{2 \times n}  

                       = \frac{615 \times 10^{-9}}{2 \times 1.501}   (as 1 nm = 10^{-9}m

                       = 204.9 m          

Thus, we can conclude that minimum thickness of benzene is 204.9 m.

4 0
3 years ago
The Coriolis effect is the deflection of winds to the right in the Northern Hemisphere and to the left in the Southern Hemispher
miss Akunina [59]

Answer:

True

Explanation:

3 0
3 years ago
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