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3 years ago

Which step of mitosis involves the chromosomes lining up in the center of the cell?

Physics

2 answers:

gizmo_the_mogwai [7]3 years ago

5 0

Answer:

Metaphase

Explanation:

During metaphase,chromosome line up in the middle of the cell.

gladu [14]3 years ago

5 0

Chromosomes line up at the metaphase.

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12 g of coal contains approximately 6 × 1023 atoms of carbon.

Phantasy [73]

Answer:

5*10^25 atoms of carbon

Explanation:

Check from the periodic table:

M(carbon) = 12.01 g/mol

Convert kg into g:

1 kg = 1000 g

Calculate the number of moles of carbon:

n(carbon) = (1000 g) ÷ (12.01 g/mol) = 83.26 mol

Convert moles into number of particles:

#(carbon) = n × NA = 83.26 mol × 6*10^23

= 5*10^25 particles

Note: NA represents the Avogadro's Number, which has the value 6.02*10^23 particles/mol.

3 0

4 years ago

A particle has ~r(0) = (4 m) ˆ and ~v(0) = (2 m/s)ˆı. If its acceleration is constant and given by ~a = −(2 m/s 2 ) (ˆı +ˆ), a

Troyanec [42]

The particle has $\vec r(0)=(4\,\mathrm m)\,\vec\imath$ and $\vec v(0)=\left(2\frac{\rm m}{\rm s}\right)\,\vec\imath$ , and is undergoing a constant acceleration of $\vec a=-\left(2\frac{\rm m}{\mathrm s^2}\right)(\vec\imath+\vec\jmath)$ .

This means its position at time $t$ is given by the vector function,

$\vec r(t)=\vec r(0)+\vec v(0)t+\dfrac12\vec a t^2$

$\implies\vec r(t)=\left[4\,\mathrm m+\left(2\dfrac{\rm m}{\rm s}\right)t-\left(1\dfrac{\rm m}{\mathrm s^2}\right)t^2\right]\,\vec\imath-\left(1\dfrac{\rm m}{\mathrm s^2}\right)t^2\,\vec\jmath$

The particle crosses the x-axis when the $\vec\imath$ component is 0 for some time $t>0$ , so we solve:

$4+2t-t^2=0\implies t^2-2t+1=5$

$\implies(t-1)^2=5$

$\implies t-1=\pm\sqrt5$

$\implies t=1\pm\sqrt5$

The negative square root introduces a negative solution that we throw out, leaving us with $\boxed{t=1+\sqrt5}$ or about 3.24 seconds after it starts moving.

3 0

4 years ago

How much force is needed to accelerate at 66 kg skier 4m/s^2 ?

Ray Of Light [21]

E force needed to accelerate a 68 kilogram-skier at a rate of
1.2
m
s
2
is 81.6 Net forces.
Explanation:
Take the mass(68kg) and the acceleration of the skier(
1.2
m
s
2
) and multiply them together

7 0

3 years ago

Name of compounds a.MgC12 b.Mg3 (PO)2 c.Ca(HCO)2

Vlad1618 [11]

Answer:

a. Magnesium dichloride

b. Magnesium phosphate

c. Calcium hydrogen carbonate

5 0

4 years ago

Would a person wearing dark cloth on a hot day feel cooler or warmer than a person wearing light colored clothing? Explain your

Leya [2.2K]

They would feel warmer cause black attracts heat and also could attract bees

7 0

4 years ago