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Veseljchak [2.6K]
3 years ago
6

The daily driving limit for time spent behind the wheel should be no more than

SAT
1 answer:
sineoko [7]3 years ago
3 0
<span>The daily driving limit for time spent behind the wheel should be no more than Six to eight hours.
Passed this point, both your mind and your muscles will be exhausted and your response time will be way slower than normal, which will increase the risk of collision on the road.</span>
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Which statement proves that quadrilateral uwxy is a parallelogram.
Tanya [424]

Parallelograms are shapes that have 4 sides, where the opposite sides are congruent and parallel

<h3>How to determine a parallelogram</h3>

For a shape to be a parallelogram, then the following must be true

  1. The opposite side lengths are congruent
  2. The opposite side lengths are parallel
  3. The diagonals bisect each other

<h3>The proof statement</h3>

The above statements in (a) above mean that:

The statements that prove that quadrilateral uwxy is a parallelogram are

  • Diagonals UX and WY bisect each other
  • Sides UW and XY are congruent
  • Sides UW and XY are parallel.
<h3></h3>

Read more about parallelograms at:

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4 0
2 years ago
What is compounding frequency?
GaryK [48]
For example, monthly capitalization with annual rate of interest means that the compounding frequency is 12, with time periods measured in years. The effect of compounding depends on: The nominal interest rate which is applied and. The frequency interest is compounded.
8 0
3 years ago
Read 2 more answers
Determine the empirical formula of a compound containing 47. 37 grams of carbon, 10. 59 grams of hydrogen, and 42. 04 grams of o
Effectus [21]

Considering the definition of empirical formula, the empirical formula is C₃H₈O₂ and the molecular formula is C₉H₂₄O₆.

<h3>Definition of empirical formula</h3>

The empirical formula is the simplest expression to represent a chemical compound, which indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms, that is, the subscripts of chemical formulas are reduced to the most integers. small as possible.

<h3>Empirical formula in this case</h3>

In this case, you have:

  • Carbon (C): 47.37 grams
  • Hydrogen (H): 10.59 grams
  • Oxygen (O):  42.04 grams

Then it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:

  • Carbon (C): \frac{47.37 grams}{12 \frac{g}{mole} }= 3.95 moles
  • Hydrogen (H): \frac{10.59 grams}{1 \frac{g}{mole} }= 10.59 moles
  • Oxygen (O):  \frac{42.04 grams}{16 \frac{g}{mole} }= 2.63 moles

The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:

  • Carbon (C): \frac{3.95 moles}{2.63 moles }= 1.5
  • Hydrogen (H): \frac{10.59 moles}{2.63 moles }= 4
  • Oxygen (O):  \frac{2.63 moles}{2.63 moles }= 1

Finally, since in the empirical formula the numbers of moles must be expressed in whole numbers, the ratio of atoms is multiplied by some number with which everything is obtained in simple whole numbers (in this case by 2):

  • Carbon (C): 1.5× 2= 3
  • Hydrogen (H): 4× 2= 8
  • Oxygen (O):  1× 2= 2

Therefore the C: H: O mole ratio is 3: 8: 2

Finally, the empirical formula is C₃H₈O₂.

<h3>Molecular formula</h3>

To obtain the molecular formula you must relate its molecular weight (PMc) with the molecular weight of the empirical formula (PMfe).

PMfe= PM (C₃H₈O₂)= 76 g/mole

The molar mass of the compound (PMc) was determined to be 228.276 g/mol. Dividing this mass PMc by the molar mass of the empirical formula PMfe gives:

228.276 g/mol ÷ 76 g/mole= 3

This means that in the molecular formula there are 3 unit formulas (empirical formulas), so it is necessary to multiply the number of all atoms by 3.

Then, the molecular formula is C₉H₂₄O₆.

Learn more about empirical formula:

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3 0
2 years ago
Factor the expression into an equivalent form 12y^2-75.
elena-14-01-66 [18.8K]

Hello oddworld7836!

\huge \boxed{\mathbb{QUESTION} \downarrow}

Factor the expression into an equivalent form 12y² - 75.

\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}

12 y ^ { 2 } - 75

By observing the expression, we can see that, 3 is the only common factor in both the terms of the expression. So, take the common factor 3 out.

12 y ^ { 2 } - 75 \\  = 3\left(4y^{2}-25\right)

Now, look at (4y² - 25). They don't have any common factors but they appear in the form of the algebraic identity ⇨ a² - b² = (a + b) (a - b). Here,

  • a² = 4, a = 2 (√a² = ✓4 = 2)
  • b² = 25, b = 5 (√b² = ✓25 = 5)

So, the (4y² + 25) becomes...

(4 {y}^{2}  - 25) \\  = \left(2y-5\right)\left(2y+5\right)

Now, bring the 3 (common factor) & rewrite the complete expression.

12 y ^ { 2 } - 75 \\  =  \boxed{ \boxed{ \bf \: 3\left(2y-5\right)\left(2y+5\right) }}

We can't further simplify it. Also, remember that the simplified form of an expression is equivalent to the expression. So, 3 (2y - 5) (2y + 5) is equivalent to 12y² - 75.

__________________

Hope it'll help you!

ℓu¢αzz ッ

8 0
2 years ago
Which of the following is NOT part of the respiratory membrane of the lungs
Bumek [7]

That which is NOT part of the respiratory membrane of the lungs is:

  • A thin layer of ciliated epithelial cells

<h3>What is the respiratory membrane?</h3>

The respiratory membrane is the surface of the lungs where there is an exchange of gases. There are many parts that make up the respiratory membrane of the lungs.

Some of these are; the respiratory mucosa, the adventitia, and the submucosa. The thin layer of ciliated epithelial cells is not a part of the respiratory membrane but is a hair-like structure that helps to remove unwanted substances from the body.

So the correct answer is: a thin layer of ciliated epithelial cells.

Learn more about the respiratory membrane here:

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#SPJ1

4 0
2 years ago
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