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miss Akunina [59]
3 years ago
5

What best describes the motion of particles in the solid state

Physics
1 answer:
dimulka [17.4K]3 years ago
3 0

The particles vibrate against each other in a soild state........i think

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A mass of 4kg suspended by a light string 2m long and at rest is projected horizontally with a velocity of 1.5 m/s. find the ang
Dafna11 [192]

Answer:

19.5°

Explanation:

The energy of the mass must be conserved. The energy is given by:

1) E=\frac{1}{2}mv^2+mgh

where m is the mass, v is the velocity and h is the hight of the mass.

Let the height at the lowest point of the be h=0, the energy of the mass will be:

2) E=\frac{1}{2}mv^2

The energy when the mass comes to a stop will be:

3) E=mgh

Setting equations 2 and 3 equal and solving for height h will give:

4) h=\frac{v^2}{2g}

The angle ∅ of the string with the vertical with the mass at the highest point will be given by:

5) cos\phi=\frac{l-h}{l}

where l is the lenght of the string.

Combining equations 4 and 5 and solving for ∅:

6) \phi={cos}^{-1}(\frac{l-h}{l})={cos}^{-1}(1-\frac{h}{l})={cos}^{-1}(1-\frac{v^2}{2gl})

8 0
3 years ago
Roger is listing some pros and cons of recycling bottles. What can he list in the “Pro” column? Pro Con Requires additional labo
ELEN [110]

Answer:

C. Reduces the amount of items that go into landfills

Explanation:

took the test and got it right

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You press on the carotid artery in your neck and begin counting what are you most likely measuring ?
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Pulse
Pulse rate/ heart rate
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Light and sound waves both share what characteristic?
egoroff_w [7]

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light and sound are both trasverse waves

Explanation:

7 0
3 years ago
الاضطراب العصبي يحدث بسبب ؟<br><br>​
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Explanation:

ا: قد يكون وراء هذه الظاهرة ميول وراثية، والتي تتسبب في صدور ردود فعل غير منتظمة في أماكن مختلفة معينة في الدماغ. تكون ردود الفعل هذه مسؤولة عن ظهور العلامات التي تميز العلامات المرافقة التي تظهر عند المرور في ظروف القلق.

ب: ان الفرضية السائدة والأساسية هنا، تقضي بأن العُصاب يظهر كردة فعلِ لفشل المنظومة النفسية الداخلية، في التأقلم مع القلق النابع من معاناة نفسية كبيرة. أو قد تنجم عن فشل المنظومة النفسية الداخلية في التأقلم مع الظروف الرضحية (التراجيدية) الخارجية والمحيطة.

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