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adell [148]
2 years ago
8

The blank is an estimating technique which requires knowledge and experience

Physics
1 answer:
I am Lyosha [343]2 years ago
4 0

The ratio method exists as  an estimating technique which requires knowledge and experience,

<h3>What is meant by ratio method?</h3>
  • Ratio technique: This method uses a basic project attribute, like size in square meters or the number of software features, and the cost per meter or feature to project the overall cost and length of the project.
  • Ratio analysis in project management can measure how effectively resources are being managed and how efficiently the project is running. The balance sheet and income statement of an organization are typically where financial ratios in the corporate environment are derived.
  • A measure of the relationship between a proposed project's relative costs and benefits, expressed in monetary or qualitative terms, is the benefit-cost ratio (BCR). The expectation is that a project with a BCR of greater than 1.0 will provide a firm and its investors with a positive net present value.

Hence, The ratio method exists as  an estimating technique which requires knowledge and experience,

To learn more about ratio method refer to:

brainly.com/question/26092288

#SPJ4

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If an object is 16.76 cm in front of a convex mirror that has a focal length of 67.1 cm, how far behind the mirror will the imag
aniked [119]

F = focal lenght = 67.1 cm

u= distance between mirror and object = 16.76 cm

1/f = 1/v + 1/u

1/67.1 = -1/16.76 + 1/u

1/67.1 + 1/16.76 = 1/u

u = 13.41

7 0
1 year ago
Why are fossils more commonly found in sedimentary rocks and not igneous rocks?
stiv31 [10]

The reason you only see fossils in sedimentary rock is that these set of rocks are formed in much lower pressure and temperature, compared to the other types of rocks like igneous rocks.

7 0
3 years ago
The speaker at the concert has the sound intensity level of 100 dB if we listen from the distance 5 m.How far from the speaker d
Mademuasel [1]

Answer:

28.11m far from the speaker the intensity drops to 85 dB.

Explanation:

In the equation for the Decibel scale

  (1). \: \:\beta =10 log(\dfrac{I}{I_0})

The ratio of the intensities can be written as

$ \frac{I}{I_0} = \dfrac{\frac{P}{A} }{\frac{P}{A_0} } $

\dfrac{I}{I_0} = \dfrac{A_0}{A}.

And since

A = 4\pi r^2

and

A_0 = 4 \pi r_0^2,

\dfrac{A_0}{A} = \dfrac{4 \pi r_0^2}{4 \pi r^2}  = \dfrac{r_0^2}{r^2}

meaning

\dfrac{I}{I_0} = \dfrac{r_0^2}{r^2}.

Putting this into equation (1), we get:

\boxed{ (2).\: \: \beta = 10log(\dfrac{r_0^2}{r^2})}

Now, if the intensity is 100 dB when the distance is 5 meters, we have:

100dB=10 log(\dfrac{r_02}{(5m)^2})

10= log(\dfrac{r_0^2}{25})

by taking both sides to the exponent:  

10^{10}= \dfrac{r_0^2}{25}

r^2 = 25 *10^{10}\\r = 5 *10^5

Now equation (2) becomes

\beta = 10log(\dfrac{25*10^{10}}{r^2})

when the intensity level is 85 dB we have

85 = 10log(\dfrac{25*10^{10}}{r^2})

8.5 = log(\dfrac{25*10^{10}}{r^2})

take both sides to exponents and we get:

10^{8.5} =10^{ log(\dfrac{25*10^{10}}{r^2})}

10^{8.5} =\dfrac{25*10^{10}}{r^2}

r^2 = \dfrac{25*10^{10}}{10^{8.5}}

\boxed{r = 28.11m}

Thus, 28.11m far from the speaker the intensity drops to 85 dB.

7 0
3 years ago
Which is NOT a subatomic particle
Novay_Z [31]

Answer:

both proton and neutron are subatomic particle

Explanation:

hope this helps u stay safe

6 0
4 years ago
Light of wavelength 550nm in air is found to travel at 1.96
Sedaia [141]

Answer:

ν = 5.45 x 10¹⁴ Hz

Explanation:

given,

wavelength of light = 550 nm

                                = 550 x 10⁻⁹ m

speed of light = 1.96 x 10⁸ m/s

speed of sound = 3 x 10⁸ m/s

frequency of the light = ?

we know.

v = \nu \lambda

frequency of the light in the liquid is same as the frequency of the light in the air.

 ν is the frequency of light

\nu = \dfrac{v}{\lambda}

\nu = \dfrac{3\times 10^{8}}{550\times 10^{-9}}

    ν = 5.45 x 10¹⁴ Hz

Hence, the frequency of light in the liquid is equal to ν = 5.45 x 10¹⁴ Hz

8 0
4 years ago
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