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3 years ago

two plastic balls with opposite charges are hung by a string close to each other. How will they interact with each other ?

2 answers:

8 0

The answer to this question is:

They will attract each other because they are opposite. If they were of the same charge they would repel each other.

Please note that it is useful to add the options provided with the question, in order to get an accurate answer and have your question answered quicker.

Hope this helps!!

mafiozo [28]3 years ago

6 0

They will pull together like magnets?

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The force of attraction that a -40.0 μC point charge exerts on a +108 μC point charge has magnitude 4.00 N. How far apart are th

Karolina [17]

Answer:

F = k q1 q2 / r^2

r^2 = k q1 q2 / F = 9E9 * 4E-5 * 10.8E-5 / 4

r^2 = 9 * 4 * 10.8 / 4 * E-1 = 9.72 m^2

r = 3.12 m

8 0

3 years ago

If a current of 2. 4 a is flowing in a wire of diameter 2. 0 mm, what is the average current density?

HACTEHA [7]

The average current density is 7.6 × 10⁵ A/m².

To calculate the current density current will be 2.4 A.

Diameter of a wire = 2mm.

The cross-sectional area of the wire is given by r = d/2

where r is the radius of the wire.

Then, the cross-sectional area is = 0.00000314159265

= 3.1 × 10⁻⁶ m².

<h3>What is average current density?</h3>

Consider a current carrying conductor, the current density depends upon the current flow in the conductor. If the current flow in the conductor will be high then the current density will also be high. Using the average current flowing through the conductor, the average current density will be found.

Average current density j = I / A Ampere/ meter².

By substituting the values in the formula,

j = 2.4 / ( 3.1 × 10⁻⁶)

= 7.6 × 10⁵ A/m².

Hence, the current density can be calculated.

Learn more about average current density,

brainly.com/question/3981451

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5 0

2 years ago

A small block slides down an incline with a constant acceleration. The block is released from rest at the top of the incline. Af

zloy xaker [14]

Answer:

v = 3.24 m/s

Explanation:

Since we don't have time, we can use the formula;

(Final distance - initial distance)/time = (initial velocity + final velocity)/2

Thus;

(x_f - x_i)/t = ½(v_xi + v_xf)

We are given;

x_i = 0 m

x_f = 5 m

v_xi = 0 m/s

v_xf = 5 m/s

Thus, plugging in the relevant values;

(5 - 0)/t = (0 + 5)/2

5/t = 5/2

t = 2 s

Using Newton's first law of motion, we can find the acceleration.

v = u + at

Applying to this question;

5 = 0 + a(2)

5 = 2a

a = 5/2

a = 2.5 m/s²

To get the speed, in m/s, of the block when it had traveled only 2.1 m from the top, we will use the formula;

v² = u² + 2as

v² = 0² + 2(2.5 × 2.1)

v² = 10.5

v = √10.5

v = 3.24 m/s

3 0

4 years ago

The drawings show three charges that have the same magnitude but may have different signs. In all cases the distance d between t

Radda [10]

Answer:

a) $F = 6816.5680 N$

b) $F' = 0 N$

c) $F''=28195.5N$

Explanation:

Magnitude of charges $M=1.6\muC$

Distance $d=2.6$

Generally the equation for Net Force is mathematically given by

For First Drawing

$F =\frac{ k q^2}{d^2}+\frac{k q^2}{d^2}$

$F =\frac{2* 9*10^9* (1.6*10^-6)^2}{ (2.6*10^-3^2}$

$F = 6816.5680 N$

For second Drawing

$F' =\frac{ k q^2}{d^2 }-\frac{ k q^2}{ d^2}$

$F' = 0 N$

For Third Drawing

$F'' =\frac{ k q^2}{d^2} * \sqrt (2)$

$F'' = 9*10^9* (6.4*10^-6)^2 * \frac{\sqrt(2)}{(4.3*10^-3)^2}$

$F''=28195.5N$

4 0

3 years ago

When object 1 came into contact with object 2, object 2 got warmer. what can be concluded about the objects before they came int

luda_lava [24]

The statement that is true regarding the objects is that object 1 had faster-moving particles, which is option 2. Details about matter can be found below.

<h3>What is matter?</h3>

Matter can be defined as any particle that has weight and occupies space.

Certain particles are present in the different states of matter. According to this question, when object 1 came into contact with object 2, object 2 got warmer.

This suggests that the particles in the object 1 is moving faster due to an increase in temperature.

Learn more about matter at: brainly.com/question/4513444

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7 0

2 years ago