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Sedbober [7]
3 years ago
13

(II) When an object such as a plastic comb is charged by rubbing it with a cloth, the net charge is typically a few microcoulomb

s. If that charge is 3.0 C, by what percentage does the mass of a 9.0-g comb change during charging?
Physics
1 answer:
TiliK225 [7]3 years ago
7 0

Answer:

1.9*10^-13 %

Explanation:

One electron represents -1.6*10^-19 C

3 μC are equivalent to 3*10^-6 C

After loss 3 μC, the amount of electron loss is:

e = (-3*10^-6) / (-1.6*10^-19) = 1.875*10^13

One electron has 9.10938356*10^-28 grams, then the mass lost is:

m = 1.875*10^13 * 9.10938356*10^-28 = 1.7*10^-14 g

The percentage loss is:

(1.7*10^-14 / 9) * 100 = 1.9*10^-13 %

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insens350 [35]

Answer:

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Explanation:

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3 years ago
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what is the force between a 3 Coulomb charge and a 2 Coulomb charge separated by a distance of 5 meters?
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5,625 x 10 ⁻¹⁰ is <span>the force between a 3 Coulomb charge and a 2 Coulomb charge separated by a distance of 5 meters.</span>
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3 years ago
A body of mass m1 = 1.5 kg moving along a directed axis in the positive sense with a velocity
larisa86 [58]

Answer:

3.71 m/s in the negative direction

Explanation:

From collisions in momentum, we can establish the formula required here which is;

m1•u1 + m2•v2 = m1•v1 + m2•v2

Now, we are given;

m1 = 1.5 kg

m2 = 14 kg

u1 = 11 m/s

v1 = -1 m/s (negative due to the negative direction it is approaching)

u2 = -5 m/s (negative due to the negative direction it is moving)

Thus;

(1.5 × 11) + (14 × -5) = (1.5 × -1) + (14 × v2)

This gives;

16.5 - 70 = -1.5 + 14v2

Rearranging, we have;

16.5 + 1.5 - 70 = 14v2

-52 = 14v2

v2 = - 52/14

v2 = 3.71 m/s in the negative direction

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3 years ago
How are solution useful for society
Butoxors [25]
Solutions are basically a release from a problem. This is more than helpful. 
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4 years ago
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You are bungee jumping from a bridge. Initially, while you are falling the slack bungee cord isn’t exerting any forces or torque
harina [27]

Answer:

he fall movement we see that both the force is different from zero, and the torque is different from zero.

When analyzing the statements the d is true

Explanation:

Let's pose the solution of this problem, to be able to analyze the firm affirmations.

When the person is falling, the weight acts on them all the time, initially the rope has no force, but at the moment it begins to lash it exerts a force towards the top that is proportional to the lengthening of the rope.

The equation for this part is

                 Fe - W = m a  

                 k x - mg = m a

As the axis of rotation is located at the top where they jump, there is a torque.

What is it

                Fe y - W y = I α

angular and linear acceleration are related

       a = α r

       Fe y - W y = I a / r

In the fall movement we see that both the force is different from zero, and the torque is different from zero.

When analyzing the statements the d is true

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3 years ago
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