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3 years ago

Which evidence is most likely used to indicate the beginning of solar system formation?

2 answers:

8 0

<h2><u><em>Answer:</em></u></h2><h2><u><em>B</em></u></h2><h2><u><em>Explanation:</em></u></h2><h2><u><em>PLZS MARK BRAINLIEST I NEED THREE TO LEVEL UP SO PLZS MARK BRAINLIEST</em></u></h2>

Aneli [31]3 years ago

4 0

Answer:

Explanation:

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Which waves are used in medicine?

Reika [66]

Answer:

Explanation:

4 0

3 years ago

A typical laboratory centrifuge rotates at 4000 rpm. Test tubes have to be placed into a centrifuge very carefully because of th

cestrela7 [59]

Answer:

1. $a_{rad}=17545.2\frac{m}{s^{2}}$

2. $a=4429.45 \frac{m}{s^{2}}$

Explanation:

Radial acceleration is:

$a_{rad}=\frac{v^2}{r}$ (1)

With r the radius respects the axis of rotation and v the tangential velocity that is related with angular velocity (ω) by:

$v= \omega r$ (2)

By (2) on (1):

$a_{rad}= \frac{(\omega r)^2}{r}= (\omega )^2r=(418,88\frac{rad}{s})^2(0.1m)$

$a_{rad}=17545.2\frac{m}{s^{2}}$

To find the acceleration of the tube with the fall, we can use the expression:

$\overrightarrow{J}=\overrightarrow{F}_{avg}(\varDelta t)$ (3)

Due impulse-momentum theorem:

$\overrightarrow{J}=\overrightarrow{p}_{f}-\overrightarrow{p}_{i}$ (4)

with p the momentum and J the impulse. By (4) on (3):

$\overrightarrow{p}_{f}-\overrightarrow{p}_{i}=\overrightarrow{F}_{avg}(\varDelta t)$

And using Newton's second law (F=ma) and that (P=mv):

$mv_f-mv_i=(ma)(\varDelta t)$ (5)

Final velocity is the velocity just after the encounter with hard floor, and initial momentum us just before that moment so the first one is zero and the second one can be found sing conservation of energy:

$\frac{mv_i}{2}=mgh$

$v_i=\sqrt{2gh}=\sqrt{2(9.81)(1.0)}=4.43\frac{m}{s}$

So (5) is:

$-m(4.43)=(ma)(\varDelta t)$

solving for a:

$a=\frac{4.43}{\varDelta t}=\frac{4.43}{1.0\times10^{-3}}=-4429.45$

It’s negative because is opposed to the tube movement.

5 0

4 years ago

Identify the state of matter.

Reil [10]

Answer:

Gases

Solids

Liquids

Explanation:

A)The molecules are a great distance apart, moving very rapidly, with negligible interaction. The substance occupies all the space available.

Gases

The state of matter described above is for gases. The distances between gases are far apart and they have very weak intermolecular attraction. They have no fixed volume as they occupy any volume of space they are introduced into.

B)The molecules are only able to vibrate rapidly about fixed positions. The substance does not need a container to maintain its shape.

Solids

Solids have fixed shape and volume. They are held together in their fixed lattice and are only able to rapidly vibrate about their fixed positions.

C)The molecules move about amongst each other, with attractive forces between them. The substance does not necessarily fill its container.

Liquids

The state of matter described here are the liquids. Liquids flow amongst each other. The attractive force between them is greater than that of gases but lesser than those of solids.

3 0

3 years ago

What are things that we can do to protect our climate for future generations?

Vilka [71]

<span>Reduce energy use.
Change the way you think about transportation. Walk or bike whenever possible.
Insulate your home. Insulate yourself and your home.
Make every drop count.
</span>Cool wash and hang to dry.
<span>Switch to "green power.
</span>Recycle.

6 0

3 years ago

Pls help! What would be considered an antonym for law of superposition??

OverLord2011 [107]

Answer:

do you have any pictures or any answers we can choose from?

Explanation:

This is an incomplete question.

8 0

3 years ago