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Alekssandra [29.7K]
4 years ago
7

Which important change in electronic devices, such as televisions and computers, is a result of the use of metalloids as semicon

ductors?
Electronic devices have become smaller.
Electronic devices are now more brittle.
Electronic devices now use more energy.
Electronic devices have become more expensive.
Chemistry
2 answers:
Dima020 [189]4 years ago
6 0

Answer:

Electronic devices have become smaller.

Explanation:

I just took the unit test in endg!

mylen [45]4 years ago
4 0

Answer:

electronic devices now use more energy

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A small hummingbird flying around beats its wings with a frequency of 170 Hz. If the wavelength of the sound wave produced is 2
bearhunter [10]

The given information in the question is :

Frequency = 170 Hz

1 Hz = \frac{1}{s}

Frequency = 170 \frac{1}{s}

Wavelength given = 2 m

Speed is unknown which we need to calculate.

Speed can be calculated by using the formula : Speed = wavelength X frequency

By plugging the value of wavelength and frequency in the above formula we get :

Speed = (2m)\times (170\frac{1}{s})

Speed = 340\frac{m}{s}

3 0
3 years ago
Suppose that an element has two isotopes. The average atomic mass of the element is 45.737 u . One isotope has a mass of 40.149
Ugo [173]

Answer:

The answer to your question is 49.08 u

Explanation:

Data

Average atomic mass = 45.737 u

Isotope 1 = 40.149 u   abundance = 37.46%

Isotope 2 = ?

Process

1.- Calculate the abundance of isotope 2

abundance isotope 1 + abundance isotope 2 = 100%

                       37.46 + abundance isotope 2 = 100

                                    abundance isotope 2 = 100 - 37.46

                                     abundance isotope 2 = 62.54

2.- Calculate the mass of isotope 2

Average atomic mass = (abundance x mass isotope 1) + (abundance x

                                                                                            mass isotope 2)

45.737 = (0.3746 x 40.149) + (62.54 x mass isotope 2)

mass isotope 2 = [45.737 - (0.3746 x 40.149)]/ 62.54

mass isotope 2 = [45.737 - 15.0398]/ 62.54

mass isotope 2 = 30.6972/62.54

mass isotope 2 = 0.4908 x 100

mass isotope 2 = 49.08 u

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Answer:

It was called The Step Reconer

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Ostrovityanka [42]

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When we weigh beans in this mass ratio, we must obtain the same number of beans.Explanation:

Nothing will happen

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White raven [17]
Which of the following is described by the equation H2O(l) + heat → H2O(g)?


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