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zavuch27 [327]
3 years ago
11

Choose the word that best completes this sentence. Welding in confined spaces and on stainless steel generates _____________ a v

ery toxic chemical?
SAT
2 answers:
Phantasy [73]3 years ago
6 0
Welding in confined spaces or on stainless steel generates Hexavalent Chromium a very toxic chemical.
frosja888 [35]3 years ago
4 0

Hexavalent Chromium


Choose the word that best completes this sentence. Welding in confined spaces and on stainless steel generates _____________ a very toxic chemical?


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In long-run equilibrium, the perfectly competitive firm earns __________ economic profits.
DochEvi [55]

In perfectly competitive markets, firms in the market in the long-run, will earn zero economic profits.

<h3>What economic profits are earned in a perfectly competitive market?</h3>

In the short-run, there is a chance to earn a positive economic profit in a perfectly competitive market but this would then attract other companies into the market to make profits as well.

This then leads to the profits disappearing thanks to increased supply and lower prices. Companies would then leave and enter to either take advantage of profits or stop losses thereby keeping economic profits at zero in the long run.

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2 years ago
How many electrons pass through a 20-ohms resistor in 10 min if there is a potential drop of 30 volts across it?
tangare [24]

The number of electrons passes through 20 ohms resistor in 10  minutes is 5.625e+21.

<h3>What is a resistor?</h3>

In an electronic circuit, a resistor is an electrical component that limits or regulates the flow of electrical current.

Given, the resistance is 20 ohms.

The potential difference is 30 volts

Time is 10 minute

By the formula of current

\rm I = \dfrac{30}{20} = 1.5 \;C/s

The charge flowing through the resistor is 1.5 C/s

1 electron charge is 1.6e+19

Now, the number of electrons passing through a 20 ohms resistor is

\dfrac{1.5}{1.6e+ ^2^1} = 0.9375e+^1^9

In 10 minutes

0.9375e+^1^9 \times 60 \times 10 = 5.625e+^2^1

Thus, the number of electrons passes through 20 ohms resistor in 10  minutes is 5.625e+21.

Learn more about a resistor

brainly.com/question/24297401

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2 years ago
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