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leonid [27]
3 years ago
6

Select the correct answer. Which statement is true about a polarized object? A. It gains electrons and becomes negatively charge

d. B. It gains protons and becomes positively charged. C. The number of positive and negative charges can be the same. D. It has to be a metal. E. There is no change in the distribution of the charge in the object.
Physics
1 answer:
coldgirl [10]3 years ago
3 0

Answer:

C. The number of positive and negative charges can be the same.

Explanation:

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Both atypical and traditional antipsychotics _____ levels of _____.
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5 0
3 years ago
A 1000 kg car moving at 108 km/h jams on its brakes and comes to a stop. How much work was done by friction?
Nostrana [21]

Answer:

The work done by friction was -4.5\times10^{5}\ J

Explanation:

Given that,

Mass of car = 1000 kg

Initial speed of car =108 km/h =30 m/s

When the car is stop by brakes.

Then, final speed of car will be zero.

We need to calculate the work done by friction

Using formula of work done

W=\Delta KE

W=K.E_{f}-K.E_{i}

W=\dfrac{1}{2}mv_{f}^2-\dfrac{1}{2}mv_{f}^2

Put the value of m and v

W=0-\dfrac{1}{2}\times1000\times(30)^2

W=-450000&#10;\ J

W=-4.5\times10^{5}\ J

Hence, The work done by friction was -4.5\times10^{5}\ J

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3 years ago
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