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Drupady [299]
3 years ago
5

What does it mean for an element to be in a solid state?

Physics
1 answer:
MatroZZZ [7]3 years ago
6 0
Solid elements are rigid elements. For example an element iron is in solid form. You can touch it and it’s hard.
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It grows every time it needs to grow for the population of the environment
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What type of reaction is represented by the example below? AB + CD = AD + CB synthesis reaction synthesis reaction exchange reac
larisa [96]

Answer:

Exchange Reaction

Explanation:

The given reaction  AB + CD = AD + CB is known as exchange reaction

At the beginning of the process, AB and CD must pass through decomposition reaction by breaking up. After that, A and D must  form by synthetic reaction and likewise C and B

The chemical reaction involves exchange of chemical elements between the chemical components AB and CD.

Therefore, The type of example represented by the reaction  

AB + CD = AD + CB

is known as Exchange reaction.

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A locomotive starts from rest and accelerates at 0.12 m/s^2 to a speed of 2.4 m/s in 20 s. This motion could best be described a
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C

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. When two plates move away from each other what faults are<br>created.​
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Read 2 more answers
An object is at rest on top of a smooth sphere with a radius of ???? = 15.3 m that is buried exactly halfway under the ground. I
NeX [460]

Answer:

10.2 m .

Explanation:

Let object falls by angle θ .

At any moment after the fall , there are two forces acting on the sphere

1 ) mg cosθ which is a component of weight towards the centre 2 ) normal reaction of the surface R .

mgcosθ - R is net force acting, which provides centripetal force

mgcosθ - R = mv² / r

But v² = 2g r( 1-cosθ )   [ object falls by height ( r - r cosθ ).

mgcosθ - R = m / r x 2g r( 1-cosθ )

When the object is no longer in touch with sphere,

R = 0

mgcosθ  = m / r x 2g r( 1-cosθ )

3 gr cosθ = 2gr

cosθ = 2/3

height of fall

= r ( 1-cosθ )

r ( 1 - 2/3 )

1/3 r

1/3 x 15.3

5.1 m

Height from the ground

15.3 - 5.1

10.2 m .

4 0
3 years ago
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