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2 years ago

Why is it important to predict consequences when decision-making?

Chemistry

1 answer:

zavuch27 [327]2 years ago

3 0

The correct answer is b

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Which of the following are true statements?

Digiron [165]

Answer:

The first is true

The second is true IF the statement means that the human body contains energy

The third is true

The fourth is false

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2 years ago

Name the phase change:

timofeeve [1]

Answer:

solid to liquid = melting

liquid to gas = evaporation

solid to gas = sublimation

liquid to solid = freezing

gas to liquid = condensation

gas to solid = deposition

Explanation:

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2 years ago

Which of these is NOT a physical change?

alexdok [17]

Answer:

C. Magnetization of iron

Explanation:

This is a chemical change and cannot be undone by physical means therefore it isn't a physical change

6 0

2 years ago

Sorry if it is blurry

Zina [86]

I really cant read it sorry i tried

7 0

2 years ago

Read 2 more answers

Alveoli are tiny sacs of air in the lungs. Their average diameter is 4.50 × 10−5 m. Calculate the uncertainty in the velocity of

Arisa [49]

<u>Answer:</u> The uncertainty in the velocity of oxygen molecule is $4.424\times 10^{-5}m/s$

<u>Explanation:</u>

The diameter of the molecule will be equal to the uncertainty in position.

The equation representing Heisenberg's uncertainty principle follows:

$\Delta x.\Delta p=\frac{h}{2\pi}$

where,

$\Delta x$ = uncertainty in position = d = $4.50\times 10^{-5}m$

$\Delta p$ = uncertainty in momentum = $m\Delta v$

m = mass of oxygen molecule = $5.30\times 10^{-26}kg$

h = Planck's constant = $6.627\times 10^{-34}kgm^2/s^2$

Putting values in above equation, we get:

$4.50\times 10^{-5}m\times 5.30\times 10^{-26}kg\times \Delta v=\frac{6.627\times 10^{-34}kgm^2/s}{2\times 3.14}\\\\\Delta v=\frac{6.627\times 10^{-34}kgm^2/s^2}{2\times 3.14\times 4.50\times 10^{-5}m\times 5.30\times 10^{-26}kg}=4.424\times 10^{-5}m/s$

Hence, the uncertainty in the velocity of oxygen molecule is $4.424\times 10^{-5}m/s$

8 0

2 years ago