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3 years ago

Why is graphite used instead of gold or copper wires to conduct electricity in very hot situations such as an industrial kiln?

2 answers:

7 0

In very hot situations like an industrial klin, there is risk of melting of wires if they are made up of metal with low melting point. Also, metal with high electrical conductivity is required under such situations.

Graphite is good conductor of heat and electricity also, it has very high melting point therefore, it is used instead of copper and gold with low melting point to make wires.

Other advantages of graphite are it is thermal shock resistant, The coefficient of thermal expansion is 3 times less than that of copper. The melting of graphite does not take place and it gets converted directly from solid to liquid at 3400 °C (extremely high temperature). It forms lighter electrode because density of graphite is 5 times less than that of copper.

Molodets [167]3 years ago

4 0

It wont melt like gold and copper would at that temperature

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Llana [10]

Answer:

B. Is the correct answer :) i hope this helps!!

Explanation:

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3 years ago

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What is one way water moves through the nonliving parts of an ecosystem during the water system?

tatyana61 [14]

Answer:

Water moves through the help of living organisms in an ecosystem. ... Plants absorbs water through their root system and loss by transpiration. Water also moves through the living organisms in an ecosystem. Other nonliving processes such as evaporation, precipitation, water returns back into the atmosphere.

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If I have a 50.0 liter container that holds 45 moles of gas at a

Darina [25.2K]

V= 50. L n=45 mol T= 200°C = 473k P=?

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3 years ago

Imagine you are sitting on a surfboard in the ocean, waiting to catch a big wave. When the ocean is still, you are sitting at a

Reil [10]

Answer:

a. What is the wavelength?

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The frequency is 0.05Hz

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The wave velocity is 0.25 meters per second

Explanation:

the wavelength is the distance between two troughs or two crests, which in this case is 5 meters.

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3 years ago

Newton’s second law of motion is F=ma A net force of 60 N north acts on an object with a of 30 kg. Use Newton’s second law of mo

Luda [366]

<u>Answer:</u> The acceleration of the object is $2m/s^2$ . If net force increases, acceleration will also increase and if mass increases, the acceleration will decrease.

<u>Explanation:</u>

Force is defined as the product of object's mass and acceleration.

Mathematically,

$F=ma$ ......(1)

or,

$a=\frac{F}{m}$ .....(2)

where,

F = Force exerted on an object = 60N

m = mass of an object = 30kg

a = acceleration of the object = ?

Putting values in above equation, we get:

$a=\frac{60kg.m/s^2}{30kg}=2m/s^2$

The acceleration of the car is $2m/s^2$ .

From equation 2, it is visible that acceleration is directly proportional to force. This means that \if force increases, acceleration also increases.

And acceleration is inversely proportional to mass of the object. This means that if mass increases, the acceleration decreases.

Hence, if net force increases, acceleration will also increase and if mass increases, the acceleration will decrease.

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3 years ago