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MaRussiya [10]
3 years ago
14

The diagram shows the electric field lines around two charges. Based on the field lines, what is the best description of the cha

rges ?
A.) they are negative, and they repel
B.) the left is negative and the right is positive, so they attract.
C.) the left is positive and the right is negative, so they attract.
D.) they are positive, they repel

Physics
2 answers:
Aloiza [94]3 years ago
7 0
Charges are moving away from both charges. Similar charges repel which means that A.) they are negative, and they repel or <span>D.) they are positive, they repel</span>
bixtya [17]3 years ago
4 0
The correct answer is <span>D.) they are positive, they repel.

The law of charges states that; like charges repel while unlike charges attract. 
</span>∴ The first conclusion we can make from the two charges is that they are like, the repel. 
<span>
Magnetic field lines moves from positive to negative. In the diagram it is clear that the fields are moving from the two charges. 

So therefore, the correct answer is that, the two charges are positive and they repel.</span>
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A block of gelatin is 120mm by 120mm by 40mm whrn unstressed. A force of 49N is applied tangentially to the upper surface causin
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Answer:

The shearing stress is 10208.3333 Pa

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Given:

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The shearing stress is defined as the force applied to the block over the projected area, first, it is necessary to calculate the area:

A = 40*120 = 4800 mm² = 0.0048 m²

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Ss=\frac{F}{A} =\frac{49}{0.0048} =10208.3333Pa

The shearing strain is defined as the tangent of the displacement that the block over its length:

SS=tan\theta =\frac{Displacement}{L}  =\frac{10}{40} =0.25

Finally, the shear modulus is the division of the shearing stress over the shearing strain:

Sm=\frac{10208.3333}{0.25} =40833.3332Pa

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