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topjm [15]
3 years ago
9

Why does sugar sink to the bottom of a tea cup?

Chemistry
2 answers:
Mandarinka [93]3 years ago
4 0
Because it is more dense than the water or tea.
miskamm [114]3 years ago
4 0

Answer:

  • The tea (solution) is hot, this means that the solution molecules are moving in a fast rate. This results in gaps being present between the solution molecules, when the sugar (solute) is added its molecules can fit in between the gaps making its way down the containers with ease.
  • Solubility is directly proportional to temperature, thus an increase in temperature (of the solution) will result in an increase in solubility (of the solute).

Explanation:

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ira [324]

Answer:

C. how the size of a magnet affects the strength of its magnetic pull on objects.

Explanation:

"Magnetic force" is <em>inversely proportional to distance squared. </em>This is also related to the size of a magnet. The bigger the size, the bigger the domain it occupies and the stronger the magnetic field. However, this is not often the case and it largely depends on the types of magnets.

In the situation above, Jazelle wanted to determine how her five different-sized magnet affect the strength of their magnetic pull on the paper clips. In order to do this, she tried to<em> measure the distance</em>. The<em> closer the distance</em>, the <em>higher the magnetic field</em> and the stronger the strength. The farther the distance, the<em> lower the magnetic field</em> and the <em>weaker the strength.</em>

So, this explains the answer.

3 0
3 years ago
Identify the precipitate (insoluble substance) in the following reaction: *
borishaifa [10]

Explanation:

PbI2 is the precipitate.................

6 0
3 years ago
If the net force on a hot-air balloon is directed straight upward, which way does the acceleration point?
Marizza181 [45]

Answer:

upward (F=ma if f is up a is up)

6 0
3 years ago
What would you observe in the reaction of calcium with nitric acid​
Marina CMI [18]

Answer:

reacts to form carbondioxide

6 0
3 years ago
The radioactive isotope of lead, Pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.
Marina86 [1]

Answer:

Therefore it will take 7.66 hours for 80% of the lead decay.

Explanation:

The differential equation for decay is

\frac{dA}{dt}= kA

\Rightarrow \frac{dA}{A}=kdt

Integrating both sides

ln A= kt+c₁

\Rightarrow A= e^{kt+c_1}

\Rightarrow A=Ce^{kt}         [e^{c_1}=C]

The initial condition is A(0)= A₀,

\therefore A_0=Ce^{0.k}

\Rightarrow C=A_0

\therefore A=A_0e^{kt}.........(1)

Given that the Pb_{209}  has half life of 3.3 hours.

For half life A=\frac12 A_0 putting this in equation (1)

\frac12A_0=A_0e^{k\times3.3}

\Rightarrow ln(\frac12)= 3.3k     [taking ln both sides, ln \ e^a=a]

\Rightarrow k=\frac{ln \frac12}{3.3}

⇒k= - 0.21

Now A₀= 1 gram, 80%=0.8

and A= (1-0.8)A₀ = (0.2×1) gram = 0.2 gram

Now putting the value of k,A and A₀in the equation (1)

\therefore 0.2=1e^{(-0.21)\times t}

\Rightarrow e^{-0.21t}=0.2

\Rightarrow -0.21t= ln(0. 2)

\Rightarrow t= \frac{ln (0.2)}{-0.21}

⇒ t≈7.66

Therefore it will take 7.66 hours for 80% of the lead decay.

3 0
3 years ago
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