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3 years ago

Does anyone know im not sure

Chemistry

1 answer:

Allisa [31]3 years ago

3 0

The answer would be aeration because that is bringing water and air into close contact to get rid of dissolved gases.

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A solar powered car converts __________ energy into _____________ energy.

kotykmax [81]

Answer:

Explanation:

Solar power takes in light and turns it into a usable energy. if used in a vehicle that would take light energy and transform it into mechanical energy.

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3 years ago

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If the half life of a radioactive isotope is 1 day, then how much of the original isotope remains at the end of two days?

ikadub [295]

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25%

Explanation:

In a half life of a radioactive isotope is 1 day,it means it loses its half mass each day

We a formula for N half life

$\sf { \frac{1}{2} }^{n}$

where n is the number of days

Here the isotope is kept for 2 days

so it's left over mass will be

$\sf { (\frac{1}{2}) }^{2} \\ \\ \\ \frac{1}{2} \times \frac{1}{2} \\ \\ \sf \frac{1}{4}$

It's left over mass 1/4th of the original mass

Now, we need to find it's percentage by multiplying with 100

$\sf \frac{1}{4} \times 100 \%\\ \\ \sf \cancel\frac{100}{4} \% \\ \\ \sf 25\%$

So 25% mass will be left after 2 day of half life radioactive isotope.

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2 years ago

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The mass of an atom is equal to the number of

Solnce55 [7]

Explanation:

proton number and neutron number sums up to form the mass number

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3 years ago

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Which of these materials requires the most heat to raise its temperature by one degree

AlladinOne [14]

Answer:

Water ______________________________________________

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A team of researchers are working on a project to make a new kind of airplane fuel. During their experiment, there was an explos

Igoryamba

This is Pseudoscience. The scientists didn’t study their experiment, they would have to prove their claim more than once, and they assumed things before actually studying it.

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3 years ago