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Licemer1 [7]
3 years ago
13

(This is rly for science but there’s no category for that) Which statement best describes how scientists and engineers work toge

ther
in the research and development cycle?
O A. Engineers come up with scientific questions when they are
developing their design, and scientists do research to answer
them.
O B. Scientists test designs made by engineers and then use the
results to improve the designs.
C. Scientists develop a new technology, and then engineers test it by
doing experiments.
D. Engineers make a scientific discovery, and then scientists perform
research to verify it.
Chemistry
1 answer:
nirvana33 [79]3 years ago
5 0

Answer:

A.  Engineers come up with scientific questions when they are developing their design, and scientists do research to answer them.

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1‑propanol ( n ‑propanol) and 2‑propanol (isopropanol) form ideal solutions in all proportions. Calculate the partial pressure a
Alex777 [14]

Answer:

y_{prop} = 0.134; y_{iso} = 0.866

The partial pressure of isopropanol = 34.04 Torr; The partial pressure of propanol = 5.26 Torr

Explanation:

For each of the solutions:

mole fraction of isopropanol  (x_{iso}) = 1 - mole fraction of propanol (x_{prop}).

Given: mole fraction of propanol = 0.247. Thus, the mole fraction of isopropanol = 1 - 0.247 = 0.753.

Furthermole, the partial pressure of isopropanol = x_{iso}*vapor pressure of isopropanol = 0.753*45.2 Torr = 34.04 Torr

The partial pressure of propanol = x_{prop}*vapor pressure of propanol = 0.247*20.9 Torr = 5.16 Torr

Similarly,

In the vapor phase,

The mole fraction of propanol (y_{prop}) = \frac{P_{prop} }{P_{prop}+P_{iso}}

Where, P_{prop} is the partial pressure of propanol and P_{iso} is the partial pressure of isopropanol.

Therefore,

y_{prop} = 5.26/(34.04+5.16) = 0.134

y_{iso} = 1 - 0.134 = 0.866

5 0
4 years ago
4 multicellular yes autotrophic It is unable to move around its environment. A. Kingdom animalia B. kingdom fungi C. kingdom pla
Alina [70]
Hello there.
<span>
4 multicellular yes autotrophic It is unable to move around its environment.

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3 years ago
HELP 20 POINTS <br>A photon has a wavelength of 366 nm. What is the frequency of this photon?​
den301095 [7]

Answer:

9.  8.2x10¹⁴ Hz

Explanation:

Wavelength λ = 366 nm

Formula: Frequency = C / λ

To find the wavelength in m,

1 nm = 1.0x10⁻⁹ m

So, 366 nm = ?

= 3.66x10⁻⁷ m

Frequency = 3.0x10⁸m.s-1 / 3.66x10⁻⁷ m

                  = 8.2x10¹⁴ s-1

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3 years ago
What is nuclear fission
swat32
Nuclear fission is the process of which a large nucleus splits into two smaller nuclei with the release of energy and neutron. In simpler words, nuclear fission is the process in which a nucleus is split into two smaller fragments or pieces (nuclei) and so energy and neutrons are released. The resulting pieces of this fission process have less combined mass than the original piece (nucleus) and the missing was is converted into nuclear energy.
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4 years ago
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