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3 years ago

Answer asap with at least 3 or more sentences!

2 answers:

7 0

It is not possible to produce a permanent magnet with only a single pole. Every magnet has at least 2 poles, a north and a south pole (see FAQ about north pole). The existence of magnetic monopoles itself does not contradict current popular theories.

mixas84 [53]3 years ago

6 0

Answer:

no.

Explanation:

The reason this has

never happened is due to the source of magnetic fields: moving electric

charges. When electric charges (e.g. electrons) move in circles, they

produce a magnetic field. In a piece of iron, it is very easy to line up

these circles, getting all the little magnets to work together as one big

magnet.

For each of these circles, one side is the north pole and one side is the

south pole. Since each circle has two sides, each circle has a north and a

south pole. Even the smallest possible magnets (spinning electrons) have a

north and a south pole.

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How are the graphs of the sine function and the cosine function different?

Zielflug [23.3K]

They are different by a phase shift of pi/2

3 0

3 years ago

HURRY PLEASE

katrin2010 [14]

Answers:

Question 1:

The diagram for gallium will have flat, horizontal lines at 30 and 2204 °C.

Questoin 2:

The diagram for methane will have a diagonal line representing the liquid phase between -183°C and -162°C.

Question 3:

For gold, the boiling point corresponds to the y-value at 2856 °C of the top horizontal line

Question 4.

For nitrogen, the line at -210°C will be flat, which represents the change from a solid to a liquid

Explanations:

Question 1:

The diagram for gallium will have flat, horizontal lines at 30 and 2204 °C.

The table shows that the melting point of gallium is 30°C and its boiling point is 2204°C.

Melting point is the temperature at which the substace changes its state from solid to liquid. During that change, the temperature of the substance does not change, because the heat supplied is used to accomplish the phase change. So, the temperature is constant and that means that portion of the diagram is flat.

The same is valid during boiling: the temperature remains constant while the substance is passing from liquid to gas at the boiling point.

Questoin 2:

The diagram for methane will have a diagonal line representing the liquid phase between -183°C and -162°C.

Between the melting (-183°C) and boiling (-162°C) points of methane, its temperature will increase more or less linearly, which is represented with a diagonal (slant) line between those points. During this interval the heat is used to increase the temperature and no phase of change happens.

Question 3:

For gold, the boiling point corresponds to the y-value at 2856 °C of the top horizontal line

The table shows that the boiling point of gold is 2,856°C.

In a temperature-vs.-time diagram the temperature is represented on the vertical axis (y-value) and the time is represented on the horizontal axis.

Since, the temperature of the substance does not change during boiling, the line during the time that this change of phase is happening is flat. And since this temperatue is higher than the melting temperature, this is the top horizontal line in the diagram.

Question 4.

For nitrogen, the line at -210°C will be flat, which represents the change from a solid to a liquid

The table shows that the melting point of nitrogen is -210°C, that means that the temperature will remain constant at -210°C while the substance is absorbing heat to pass from solid to liquid.

In conclusion, you must remember that all the phase changes, melting (from solid to liquid), freezing (from liquid to solid), boilng (from liquid to gas), and condensing (from gas to liquid) happens at constant temperature, and so the temperature - vs. - time diagrams show flat lines (constant y-values) during those intervals of time.

4 0

3 years ago

Read 2 more answers

If nitrogen and hydrogen combine in a combustion reaction, what would the product of the reaction be?

kow [346]

Co2

Explanation:

CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (l)

4 0

3 years ago

Read 2 more answers

[Kr]5s^24d^105p^4

Margarita [4]

- Telleurium ( Te) is the chemical symbol
- electron is 52,
- there are 2 electron in 5s

7 0

4 years ago

what is the concentration (molarity) of a solution where 149g of kcl is dissolved in enough water to get a total volume of the s

Anit [1.1K]

Molar mass KCl = 74.55 g/mol

Number of moles:

mass KC / molar mass

149 / 74.55 => 1.998 moles

Volume in liters: 500 mL / 1000 => 0.5 L

Therefore:

M = moles / volume

M = 1.998 / 0.5

M = 3.996 mol/L⁻¹

4 0

3 years ago