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4vir4ik [10]
4 years ago
10

A glass marble is rubbed against a piece of silk. as a result the piece of fabric acquires extra electrons. what happens to the

glass marble? check all that apply. view available hint(s) check all that apply. the marble has lost the same number of electrons acquired by the piece of silk. the marble has acquired the same number of electrons acquired by the piece of silk. the marble acquires a positive charge and repels the piece of silk. the marble acquires a positive charge and attracts the piece of silk. the marble acquires a negative charge and attracts the piece of silk. the marble acquires a negative charge and repels the piece of silk. submit
Physics
2 answers:
lawyer [7]4 years ago
8 0
<span>So when a glass marble is rubbed against a silk cloth, the silk cloth acquires some electron from glass marble. So the from the given option two statements apply to the situation, the marble has lost the same number of electrons acquired by the piece of silk and the marble acquires a positive charge and attracts the piece of silk.</span>
hodyreva [135]4 years ago
4 0

Answer:

the marble has lost the same number of electrons acquired by the piece of silk.

the marble acquires a positive charge and attracts the piece of silk.

Explanation:

As we know that charging of an object is related to transfer of electrons. When an object becomes negatively charged then it shows that it will get excess of electrons while for positively charged it will lose some electrons.

So here we know that glass is rubbed with silk cloth so here silk cloth will gain some electrons and gets negative charge while glass will lose same electrons and becomes positively charged.

So here due to equal and opposite charge on silk and glass they both will attract each other.

So here correct answers will be

the marble has lost the same number of electrons acquired by the piece of silk.

the marble acquires a positive charge and attracts the piece of silk.

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in which item is energy stored in the form of gravitational potential energy A)a slice of bread B)a compressed string C)an apple
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For this case, in the next item we have gravitational potential energy:

An apple in a tree.

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Answer:

C) an apple on a tree

7 0
4 years ago
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A major artery with a 1.7 cm2 cross-sectional area branches into 18 smaller arteries, each with an average cross-sectional area
Alex

Answer:

0.14

Explanation:

Flow rate is the volume flowing through a point at a particular time, in calcuing flow rate we have

Q= v*t

it in terms of Area, we have Q= A*v

Where A= area

v= velocity.

Solving the question , flow rate is constant then

A*v= constant

A(i) v(i)= A(f) v(f)

Where A(i)= initial area= 1.00cm^2

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V(i) and V(f) are the initial and final velocity respectively and the ratio of the two will gives us the factor

Substitute the values into the equation we have

1 V(i)= 4 V(f)

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Then

1 V(i)=0.4 V(f)*(18)

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Then if we find the ratio of the velocity, we will get the factor.

V(f)/V(i)= 1/7.2

V(f)/V(i)=0.14

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8 0
3 years ago
A longitudinal wave is also known as a(n) _____ wave.
Furkat [3]
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which measurment describes the amount of heat needed to raise the temperature of one gram of a material by one degree celsius?
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<u>Answer:</u>

Specific Heat

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4 years ago
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<h2>Right answer: acceleration due to gravity is always the same </h2><h2 />

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Now, in this case we are on Earth, so the gravity value is 9.8\frac{m}{s^{2}}  

Note the objects experience the acceleration of gravity regardless of their mass.

Nevertheless, on Earth we have air, hence <u>air resistance</u>, so the afirmation <em>"Free fall is a situation in which the only force acting upon an object is gravity" </em>is not completely  true on Earth, unless the following condition is fulfiled:

If the air resistance is <u>too small</u> that we can approximate it to <u>zero</u> in the calculations, then in free fall the objects will accelerate downwards at 9.8\frac{m}{s^{2}} and hit the ground at approximately the same time.  


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4 years ago
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