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Viktor [21]
3 years ago
8

Help me, it’s pretty easy science moon stuff !

Chemistry
2 answers:
trasher [3.6K]3 years ago
8 0
Hello :)
Based on the information I received reading the picture, the answer should be “B”

Explanation: if I am wrong I’m very sorry. But that should be the answer
Brrunno [24]3 years ago
7 0
I believe it should be B.
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When scientists first studied electromagnetic energy, many theories were proposed to explain how these waves travel through spac
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Answer:

Scientists debated the theories with each other and compared the theories with scientific observations

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Which tool was most likely used in a procedure if the lab report shows that approximately 300 mL of water was used ?
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Graduated Cylinder is the answer to this.


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Find the mass of an object with a density of 2.01g/mL and a volume of 3.77mL
oee [108]

Answer:

<h2>7.58 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 2.01 × 3.77 = 7.5777

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Hope this helps you

3 0
3 years ago
How are half life and radioactive decay related
hoa [83]

Answer : Half life and radioactive decay are inversely proportional to each other.

Explanation :

The mathematic relationship between the half-life and radioactive decay :

N=N_oe^{-\lambda t}              ................(1)

where,

N = number of radioactive atoms at time, t

N_o = number of radioactive atoms at the beginning when time is zero

e = Euler's constant = 2.17828

t = time

\lambda = decay rate

when t=t_{1/2} then the number of radioactive decay become half of the initial decay atom i.e N=\frac{N_o}{2}.

Now substituting these conditions in above equation (1), we get

\frac{N_o}{2}=N_oe^{-\lambda t_{1/2}}

By rearranging the terms, we get

\frac{1}{2}=e^{-\lambda t_{1/2}}

Now taking natural log on both side,

ln(\frac{1}{2})=-\lambda \times t_{1/2}

By rearranging the terms, we get

t_{1/2}=\frac{0.693}{\lambda}

This is the relationship between the half-life and radioactive decay.

Hence, from this we conclude that the Half life and radioactive decay are inversely proportional to each other. That means faster the decay, shorter the half-life.

3 0
3 years ago
The middle ear converts sound from what into vibrations that can be sent through what?
Katarina [22]

Answer:

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Explanation:

Eardrum or tympanic membrane changes sound to vibration and pass through malleus, incus and stapes.

5 0
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