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4 years ago

Steel objects can become temporary magnets because they are mainly composed of which element?

Physics

2 answers:

g100num [7]4 years ago

7 0

<h3>Answer; </h3>

Iron

<h3>Explanation;</h3>

Magnets are materials that have the capability of generating magnetic fields. They repel non-magnetic materials such as wood, plastic etc. and attract magnetic material such as iron and steel.

Permanent magnets are types of magnets that whose magnetic field originates from the internal structure of the material used to make the magnet. These types of magnets are made from hard or ferro-magnetic materials such as steel.

Steel is an alloy that contains the main constituents iron and carbon and may also have small amounts of elements such as nickel, vanadium etc. It is the element iron that makes steel to have the potency of becoming temporary magnet since iron is magnetic.

alekssr [168]4 years ago

3 0

Steel alloy mostly consists of iron

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tatiyna

Answer:

The final pressure inside the balloon will be $P_2=0.0359\ atm$ .

Explanation:

Given initial temperature of the balloon is $T_1=12.8\°C$

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And the final pressure in the balloon is $P_2$ and the volume be $V_2$

Also, it is given in the question that the final volume became twenty-two times the original volume.

We can write $V_2=22V_1$

Now, using ideal gas equation.

$\frac{P_2V_2}{P_1V_1}=\frac{nRT_2}{nRT_2}$

Where, $R$ is the gas constant. And $n$ is moles of substance inside the balloon.

In our problem the value of $n$ will be the same for both cases. Also, $R$ is the gas constant.

$\frac{P_2V_2}{P_1V_1}=\frac{T_2}{T_1}$

Also, we have $V_2=22V_1$ from the question.

$\frac{P_2\times 22V_1}{P_1V_1}=\frac{T_2}{T_1}\\\\\frac{P_2\times 22}{P_1}=\frac{T_2}{T_1}$

We need to convert the temperature from $\°C$ to Kelvin.

$T_1=12.8\°C\\T_1=12.8+273.15=285.95\\T_2=-47.7\°C\\T_2=-47.7+273.15=225.45$

Plug these values we get,

$\frac{P_2\times 22}{1}=\frac{225.45}{285.95}\\\\22\times P_2=0.789\\P_2=\frac{0.789}{22}\\P_2=0.0359\ atm.$

So, the final pressure inside the balloon will be $P_2=0.0359\ atm$ .

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lbvjy [14]

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