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BigorU [14]
3 years ago
9

What particles in an atom can increase and decrease in number without changing the identity of the elements

Physics
2 answers:
viktelen [127]3 years ago
6 0
Neutrons and electrons
Dennis_Churaev [7]3 years ago
3 0

Answer:

The number of neutrons or electrons in an atom can change without changing the identity of the element.

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Plz help me plz its in the picture
natka813 [3]
Il write down the answers of the blanks which are as follows:-
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5 0
3 years ago
A biologist looking through a microscope sees a bacterium at r⃗ 1=2.2i^+3.7j^−1.2k^μm(1μm=10−6m). After 6.2 s , it's at r⃗ 2=4.6
stiv31 [10]

The Average velocity for the bacterium is 0.75 unit/sec.

<u>Explanation:</u>

The given values are in the vector form

Where,

dS = distance covered

dT = time interval

Now, to calculate distance covered, we have

|d S|=\sqrt{d S^{2}}

&

d S=r_{2}-r_{1}

d S=(4.6 i+1.9 k)-(2.2 i+3.7 j - 1.2 k)

d S=(4.6-2.2) i+(0-3.7) j+(1.9+1.2) k

d S=2.4 i-3.7 j+3.1 k

Now, putting these values in the standard formula to evaluate the average velocity, we get;

v_{a v g}=\frac{|\mathrm{d} S|}{d T}

v(a v g)=\frac{|\sqrt{\left\{\left(2.4^{2}\right)+\left(3.7^{2}\right)+\left(3.1^{2}\right)\right\}}|}{7.2}

As dT=7.2 sec

Now,

Solving the equation, we get;

v(a v g)=\frac{5.390732789}{7.2}

\begin{aligned}&v(a v g)=\frac{5.39}{7.2}\\&v(a v g)=0.748611111\\&v(a v g)=0.75 \text { units / sec }\end{aligned}

Hence, the average velocity for the bacterium is 0.75 unit/sec.

3 0
4 years ago
Why do you think you need to stir the Kool Aid?
PtichkaEL [24]

Answer:

Stirring the Kool aid enables the the kool-aid to dissolve in water by keeping all of the crystals off the bottom and in the water.

6 0
3 years ago
Read 2 more answers
Whích phase change is the result of particles moving more quickly? (2 points)
sdas [7]

Answer:

liquid to gas

Explanation:

let me know if this helps

8 0
3 years ago
When scientists publish experimental results their results are often criticized by other scientists how is this process a source
Musya8 [376]

Answer:

it gets criticised and then the scientists make it better

Explanation:

it gets criticised and then the scientists make it better because the oter scientists give them ideas

5 0
4 years ago
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