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3 years ago

Magnetism is a

Physics

2 answers:

san4es73 [151]3 years ago

6 0

Your answer would be a, it is a force.

marshall27 [118]3 years ago

6 0

Answer: The correct answer is "force".

Explanation:

Magnet has two poles: South pole and North pole.

Magnetic field lines are the surrounding around the magnet in which magnetic force can be experienced.

Like poles repel each other. There is force of repulsion between like poles. Unlike poles attract each other. There is force of attraction between the opposite poles.

Magnetism is a force. It is not a power. The power is the rate of doing work.

Magnetism is not a form energy.

Therefore, the correct option is (A).

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The diagram below shows the different phase transitions that occur in matter.

Margaret [11]

Answer:A

Explanation:matter normally occurs in three phases;solid, liquid and gases. They may change from one phase to another due to temperature difference.

The molecules that makes up solids are held together by bonds. When heat is added,the molecules begin to move as a result,the bonds break and it turns to liquid.this process is called melting. The reverse of melting is freezing.

Liquid are made up of molecules that moves more freely than solids. When heat is added to liquid,the molecules gain more energy and begins to move faster. This causes them to turn to gases.

This process is called evaporation. It occurs at different temperature for different substances.

The particles of gases move more faster and are separated by large distances. A gas can change back to a liquid through condensation.

7 0

3 years ago

Read 2 more answers

Answer these two questions please

Grace [21]

1.The answer is True
2.The answer is False

8 0

3 years ago

Hello, can you please help me with this problem?

dolphi86 [110]

Answer:

You're right already. It's B)

5 0

3 years ago

Read 2 more answers

When a 1.0-kilogram cart moving with a speed of 0.50 meter per second on a horizontal surface collides with a second 1.0-kilogra

yanalaym [24]

The speed of the combined carts after the collision is 0.25 m/s

Explanation:

We can solve this problem by using the principle of conservation of momentum. In fact, the total momentum of the system must be conserved before and after the collision, so we can write:

$p_i = p_f\\m_1 u_1 + m_2 u_2 = (m_1+m_2)v$

where:

$m_1 = 1.0 kg$ is the mass of the first cart

$u_1 = 0.50 m/s$ is the initial velocity of the first cart

$m_2 = 1.0 kg$ is the mass of the second cart

$u_2 = 0$ is the initial velocity of the second cart

$v$ is the final combined velocity of the two carts

Re-arranging the equation and substituting the values, we find: the final velocity:

$v=\frac{m_1 u_1}{m_1+m_2}=\frac{(1.0)(0.50)}{1.0+1.0}=0.25 m/s$

Learn more about momentum:

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#LearnwithBrainly

4 0

4 years ago

Why is the gravitational force usually ignored in problems involving particles such as electrons and protons?

Studentka2010 [4]

Answer:

Because the mass of electrons and protons is very small

Explanation:

The gravitational force exerted between two objects is given by:

$F=G\frac{m_1 m_2}{r^2}$

where

$G=6.67 \cdot 10^{-11} m^3 kg^{-1} s^{-2}$ is the gravitational constant

m1 and m2 are the masses of the two objects

r is the distance between the two objects

The mass of a proton and of an electron is very small, so the gravitational force involved in case of such particles is very weak. Let's calculate for example the gravitational attraction between one proton and one electron at a distance of r = 1 m. We have:

- Proton mass: $m_1 = 1.67 \cdot 10^{-27}kg$

- Electron mass: $m_2 = 9.11\cdot 10^{-31}kg$

So, the gravitational force between the two particles is:

$F=(6.67\cdot 10^{-11} m^3 kg^{-1} s^{-2})\frac{(1.67\cdot 10^{-27}kg)(9.11\cdot 10^{-31} kg)}{(1 m)^2}=1.01\cdot 10^{-67}N$

Which is a very weak force.

By comparison, let's calculate instead the electromagnetic force between a proton and an electron (both having a charge of $q=1.6\cdot 10^{-19}C$ ) still separated by a distance of r = 1 m. We have:

$F=k\frac{q_1 q_2}{r^2}=(9.0\cdot 10^9 Nm^2C^{-2})\frac{(1.6\cdot 10^{-19}C)(1.6\cdot 10^{-19}C)}{(1 m)^2}=2.3\cdot 10^{-28}N$

Which we see is much stronger than the gravitational force (almost by a factor $10^{40}$

4 0

4 years ago