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bekas [8.4K]
3 years ago
11

The fundamental rule for the attraction and repulsion of magnets is magnetic forces follow the inverse-square law. opposite char

ges attract each other and like charges repel. like poles repel each other; opposite poles attract. magnetic poles attract other magnetic poles.
Physics
1 answer:
Hitman42 [59]3 years ago
7 0

Answer:

Explanation:

It is true: the fundamental rule for the attraction and repulsion of magnets is magnetic forces follow the inverse-square law.

The force is given by

F\alpha \frac{1}{r^{2}}

It is true: opposite charges attract each other and like charges repel.

It is true: like poles repel each other; opposite poles attract.

It is not true:  magnetic poles attract other magnetic poles.

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True. Since Inertia states this law, we are bound to believe greater mass = greater resistance in change of motion
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A sphere is charged with electrons to -6 x 10^-6C. How many electrons make up this charge? The elemental charge is 1.6 x 10^-19
just olya [345]

Answer:

3.75*10^{-13}  electrons

Explanation:

The total charge Q is the sum of the charge of the N electrons contained in the sphere:

Q=N*q_{e}

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We solve to find N:

N=\frac{Q}{q_{e}}=\frac{-6 x 10^{-6}}{-1.6 x 10^{-19}}=3.75*10^{-13}

7 0
4 years ago
A car moving with an initial speed v collides with a second stationary car that is one-half as massive. After the collision the
Mashutka [201]

Answer:

4v/3

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Assume elastic collision by the law of momentum conservation:

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Substitute m_2 = m_1/2 \& v_1 = v/3

m_1v = \frac{m_1v}{3} + \frac{m_1v_2}{2}

Divide both side by m_1, then multiply by 6 we have

6v = 2v + 3v_2

3v_2 = 4v

v_2 = \frac{4v}{3}

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5 0
3 years ago
ou purchase a rectangular piece of metal that has dimen- sions 5.0 * 15.0 * 30.0 mm and mass 0.0158 kg. The seller tells you tha
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Answer: 7022.2kg/m³, yes, I was cheated

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Density of an object is defined as the ratio of the mass of the object to its volume. Mathematically;

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Given mass = 0.0158kg

Dimension of the metal = 5mm×15mm×30mm

Note that 1mm = 0.001m

The volume of the metal will be

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Density = 0.0158/0.00000225

Average density of the metal = 7022.2kg/m³

Since the standard density of Gold is 19,320kg/m³ and is higher than the density prescribed for me, it shows the I was cheated.

4 0
4 years ago
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Explanation:

direction of electric field is same as that of force experienced by the test charge

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