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lara31 [8.8K]
4 years ago
5

Which two factors determine sound intensity? A the wave’s frequency and speed B the wave’s amplitude and the distance from the s

ound source C the wave’s amplitude and speed D the wave’s frequency and the distance from the sound source
Chemistry
1 answer:
Marat540 [252]4 years ago
3 0

Answer:

I believe Its  B

Explanation:

In order to  determine the sounds intensity, you will need to find out  how far is the source of the sound and how high or low the sound is.

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A meal containing a burger, fries, and a milkshake contains 53.0 grams of fat, 38.0 grams of protein, and 152 grams of carbohydr
RSB [31]

Answer:

286 minutes

Explanation:

Given the content of fat in a meal= 53g

the content of protien in a meal= 38g

the content of carbohydrate in a meal= 152g

Also given that fuel value of protien = 17 KJ/g

the fuel value of fat = 38 KJ/g

the fuel value of carbohydrate = 17 KJ/g

Now to burn all the molecules the energy recquired is content of molecule times the fuel value.

the energy recquired to burn fat = 53\times 38=2014KJ

the energy recquired to burn protien = 38\times 17=646KJ

the energy recquired to burn carbohydrate =152 \times 17=2584KJ

The total energy=2014+646+2584=5244KJ

The energy spent on swimming is 1100KJ/hour

for 1 hour 1100 KJ are spent

to spend 5244 KJ of energy the time taken is = \frac{5244}{1100}=4.76hours

We know 1 hour=60 minutes

The total time = 4.76\times 60=286minutes

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4 years ago
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Explanation:

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3 years ago
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There is a hurricane affecting the Gulf Coast. Weather or Climate?
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A jeweler guarantees that a piece of jewelry is at least 95% gold, by mass. You consider buying a piece of gold jewelry that wei
ELEN [110]
The density of the sample is:
Density = mass / volume
Density = 9.85 / 0.675
Density = 14.6 g/cm³

If the sample has 95% gold, and 5% silver, its density should be:
0.95 x 19.3 + 0.05 x 10.5
Theoretical density = 18.9 g/cm³

The difference in theoretical and actual densities is very large, making it likely that the jeweler was not telling the truth.
8 0
4 years ago
This is the chemical formula for acetic acid (the chemical that gives the sharp taste to vinegar): an analytical chemist has det
zhannawk [14.2K]
<h3>Answer:</h3>

                    3.2 moles of Oxygen

<h3>Explanation:</h3>

                        Acetic Acid having chemical formula C₂H₄O₂ and structural formula attached below is the second member of carboxylic family in organic compounds. It is commonly used as vinegar<em> i.e</em>. a mixture containing 5 % Acetic acid and 95 % water.

As shown in structure 1 mole of Acetic acid contains 2 moles of Carbon atoms, 4 moles of Hydrogen atoms and 2 moles of Oxygen atoms respectively. Hence, the number of moles of Oxygen atoms contained by acetic acid containing 3.2 moles of Carbon is calculated as,

                      2 moles of C accompany  =  2 moles of O

So,

               3.2 moles of C will accompany  =  X moles of O

Solving for X,

                     X  =  (3.2 mol C × 2 mol O) ÷ 2 mol C

                      X =  3.2 mol of Oxygen

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3 years ago
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