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4 years ago

Iron can rust when it is exposed to oxygen. What method could be used to prevent iron from rusting?

2 answers:

8 0

Put the iron where there are no oxygen, like space, the moon, the ISS, or put it underground compact dirt will kee all oxygen away, make sure where you bury it that it is completely dry.

Burka [1]4 years ago

3 0

You have a few choices:

-- Take it out of Earth's atmosphere.

-- Put it in a tank where you pumped all the air out of it.
   You can put whatever you want back in the tank, just
   as long as there's no oxygen in there.

-- Besides oxygen, rusting also needs water. The humidity
   (water vapor) in the air is enough to do it. So if you can
keep the air totally, totally dry around the iron, then the
oxygen alone won't make it rust.

-- All these choices do the same thing: Make sure that
   oxygen and water vapor can't reach the iron. The easy
   way to do that is to paint or spray something onto the
   surface of the iron that keeps the air away from it.

You might be interested in

Which statement most accurately describes the second law of thermodynamics?

balandron [24]

Answer:

Energy cannot be changed from one form to another without a loss of usable energy

Explanation:

Second law of thermodynamics states that the total entropy or the randomness of the system remains constant over time. It also states that the net entropy will remain the same or it will increase.

Entropy of a system is given by heat absorbed divided by temperature. It is given by :

$\Delta S=\dfrac{\Delta Q}{T}$

So, the correct option is (A) "Energy cannot be changed from one form to another without a loss of usable energy".

4 0

3 years ago

A 6.2 kg ladder, 1.97 m long, rests on two sawhorses. Sawhorse A is 0.64 m from one end of the ladder, and sawhorse B is 0.17 m

Keith_Richards [23]

Answer:

42.69 N and 18.07 N

Explanation:

We are given that

Mass of ladder=6.2 kg

Length of ladder=1.97 m

Distance of Sawhorse A from one end=0.64 m

Distance of sawhorse B from other end=0.17 m

Let center of Ladder= $\frac{1.97}{2}=0.985 m$

Now, the distance of sawhorse A from center=r=0.985-0.64=0.345 m

Distance of sawhorse B from center of ladder=0.985-0.17=0.815 m

Force one ladder due to gravity=mg= $6.2\times 9.8=60.76N$

Where $g=9.8 m/s^2$

Torque applied on Sawhorse A= $0.345F_a$

Torque applied on Sawhorse B= $0.815F_b$

In equilibrium

$0.345F_a=0.815F_b$

$F_b=\frac{0.345}{0.815}F_a$

Total force= $F_a+F_b$

$F_a+\frac{0.345}{0.815}F_a=60.76$

$\frac{0.815F_a+0.345F_a}{0.815}=60.76$

$\frac{1.16}{0.815}F_a=60.76$

$F_a=\frac{60.76\times 0.815}{1.16}=42.69 N$

$F_b=\frac{0.345}{0.815}\times 42.69=18.07 N$

8 0

4 years ago

An LED light bulb is favored over an incandescent light bulb because it is more , what?

Ket [755]

An LED light bulb is favoured because it is more bright.

6 0

3 years ago

In any ecosystem, the organisms ___________ for resources, such as food, water, and space. compete fight kill

Rashid [163]

Compete

Explanation:

In any ecosystem, it is a known fact that the organisms compete for resources such as food, water, and space.

An ecosystem is made up of different communities of organisms interacting with one another and their environment.

Resources in any environment are limited and are not able to satisfy the needs of the organisms.
This leads organisms to compete for them.
they begin to develop different behaviors that can enhance their chances of accruing more resources to themselves.

learn more:

Ecosystem brainly.com/question/7846024

#learnwithBrainly

3 0

3 years ago

Read 2 more answers

A system consists of N particles that can occupy two energy levels: a nondegenerate ground state and a three-fold degenerate exc

cupoosta [38]

Answer:

Ng = 0.893 N, Ne = 0.107N

Explanation:

Number of particles in Ground state = Ng

Number of particles in Excited state = Ne

Ne/Ng = e^{(-ΔE)/kt}

Since excited state is 3 fold degenerate

Ne/Ng =3 x e^{(-ΔE)/kt}

ΔE = Energy difference between ground and excited states = 0.25eV

T = 960 K

Constant k = 8.617 x 10^-5 eV/K

Ne/Ng = 3 x e^{-0.25/(8.617x10^-5) x 960}

= 3 x e^(-3.188645)

= 3 x 0.0412 = 0.1237 ≅ 0.12

Ne = 0.12 Ng

but Ne + Ng = N, where is N is total number of particles, substituting Ne into equation we get,

Ng(1 + 0.12) = N

Ng = N/1.12 = 0.893N

and Ne = 0.12 x 0.893 N = 0.107 N

3 0

4 years ago