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3 years ago

Plzzz fastttt answerrr

Chemistry

1 answer:

Lady_Fox [76]3 years ago

5 0

Answer:

Communication between scientists increased.

Technological advancements were made.

Explanation:

The options:

Metalworkers began using new metals.

Communication between scientists increased.

The American Civil War started.

Technological advancements were made.

The reasons the number of known elements more than double by 1861 would be because technological advancements have been made and communication between scientists increased.

With the advancement in technology, more equipment become available and research became more sophisticated leading to new discoveries. The new discoveries would not have made much difference if they are not adequately communicated to other scientists.

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As of January 2009, the USA has produced 60,000 metric tons of nuclear waste in 60 yesrs of operating 104 nuclear power plants.

goblinko [34]

Answer: a. 0.8 tons p. month.

Explanation:

Given: Total nuclear waste = 60,000 metric tons

Time take = 60 years = 12 x 60 months [ 1 year = 12 months]

= 720 months

Total nuclear power plants = 104

Now , Average waste produced by each plant = $\dfrac{\text{Total waste}}{\text{Time x Number of plants}}$

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Hence, 0.8 tons p. month is produced by each plant.

So, option a. is correct.

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What is the destiny of an object that has a mass of 20 grams and a volume of 10 millimeters

blondinia [14]

Answer:

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Explanation:

Given parameters:

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Unknown:

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Solution:

Density of a body is its mass per unit volume;

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We need to convert mL to cm³ for the volume

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10mL is therefore, 10cm³

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Density = $\frac{20}{10}$ = 2gcm⁻³

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2 years ago

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Answer:

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Explanation:

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siniylev [52]

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Scorpion4ik [409]

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