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3 years ago

Help Give 3 examples nasa spinoffs

Chemistry

1 answer:

kati45 [8]3 years ago

6 0

Mini Heat Pipes Wick Away Heat in Brain Surgery is one there are a few others.

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A beaker with water and the surrounding air are all at 24°C. After ice cubes are placed in the water, heat is transferred from:

xxTIMURxx [149]

(3) the water to the ice cubes
This is so because the ice cubes are colder compared to their surrounding objects.
They absorb the heat from the water, cooling it, therefore vanishing(melting).

5 0

3 years ago

Read 2 more answers

Calculate the mass of iron(III) oxide that contains a million iron atoms. Be sure your answer has a unit symbol if necessary, an

KiRa [710]

Answer: The mass of iron (II) oxide that contains a million iron atoms is $2.6\times 10^{-17}g$

Explanation:

We are given:

Number of iron atoms = A million = $1.0\times 10^6$

The chemical formula of the given compound is $Fe_2O_3$

It is formed by the combination of 2 iron atoms and 3 oxygen atoms.

According to mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of particles

1 mole of iron (II) oxide will contain = $(2\times 6.022\times 10^{23})=1.2044\times 10^{24}$ number of iron atoms

We know that:

Molar mass of iron (II) oxide = 159.7 g/mol

Applying unitary method:

For $1.2044\times 10^{24}$ number of iron atoms, the mass of iron (II) oxide is 159.7 g

So, for $1.0\times 10^6$ number of iron atoms, the mass of iron (II) oxide will be $\frac{159.7}{1.2044\times 10^{24}}\times 1.0\times 10^6=2.6\times 10^{-17}g$

Hence, the mass of iron (II) oxide that contains a million iron atoms is $2.6\times 10^{-17}g$

8 0

4 years ago

A spectrophotometer measures the transmittance or the absorbance, or both, of a particular wavelength of light after it has pass

Taya2010 [7]

Answer:

b. The transmittance of the cuvette must be measured in the same place each time.

Explanation:

When using a spectrophotometer, light passes not only through the liquid sample, it also passes through the cuvette. This means that each time a reading is made, you not only measure the transmittance/absorbance of the sample, but of the cuvette as well.

For this reason it's important that the reading of the cuvette's absorbance remains the same through all the process, so the answer is b), because different faces of the cuvette may have different absorbances.

4 0

4 years ago

1 point

Genrish500 [490]

With an electronegativity of 0.89, Barium requires the least amount of energy to remove its valence electrons.

5 0

3 years ago

Please help!!

kirill [66]

Im interested in solar energy.

The career area that is interesting is pure research into new science.

How does a scientist use solar energy in pure research to develop new ways in science?

What is pure research?

How can a scientist get solar energy?

What does a scientist do in pure research?

When do scientist know they found a new way?

How can they propose the new way of science?

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6 0

4 years ago