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4 years ago

Which statement correctly describes what atoms and molecules are made

Physics

1 answer:

Fittoniya [83]4 years ago

5 0

Answer:

Explanation:

Molecules is made up from and atom is made up with three tiny elements: protons, neutrons, and electron.

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An ice-skater is moving at a constant velocity across an icy pond, The skater throws a snowball directly ahead.

Murljashka [212]

Answer:

(D) It is equal to the original velocity of the skater.

Explanation:

The velocity of the center of mass of a system is

$\vec{v}_{cm} = \frac{m1\vec{v}_1 + m_2\vec{v}_2}{m_1 + m_2}$

The velocity of the center of mass is constant if there is no external force, because the total momentum of the whole system is conserved.

So, before the snowball is thrown, the velocity of the center of mass is equal to that of the skater. This velocity will always be equal to the velocity of the center of mass of the system.

6 0

4 years ago

I need help with this PLEASE SHOW THE WAY

Rasek [7]

Answer:

10 mm will be the answer my friend

7 0

4 years ago

Suppose that the strings on a violin are stretched with the same tension and each has the same length between its two fixed ends

lesya692 [45]

Answer:

0.00384 kg/m

Explanation:

The fundamental frequency of string waves is given by

$f=\frac{1}{2L}\sqrt{\frac{F}{\mu}}$

For some tension (F) and length (L)

$f\propto\frac{1}{\mu}$

Fundamental frequency of G string

$f_G=196\ Hz$

Fundamental frequency of E string

$f_E=659.3\ Hz$

Linear mass density of E string is

$\mu_E=3.4\times 10^{-4}\ kg/m$

So,

$\frac{F_G}{F_E}=\sqrt{\frac{\mu_E}{\mu_G}}\\\Rightarrow \frac{F_G^2}{F_E^2}=\frac{\mu_E}{\mu_G}\\\Rightarrow \mu_G=3.4\times 10^{-4}\times \frac{659.3^2}{196^2}\\\Rightarrow \mu_G=0.00384\ kg/m$

The linear density of the G string is 0.00384 kg/m

4 0

3 years ago

Initilal velocity of projectile at an angle of 22.5° is 10m/s. Then what is the magnitude of range of projectile?

crimeas [40]

Answer:

0.707m

Explanation:

from formula of range i.e R=Usin2Q/g

3 0

3 years ago

What is the equivalent capacitance of the three capacitors in the figure?

pantera1 [17]

Where's the figure?.........

8 0

3 years ago