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3 years ago

How is the way scientist use the word theory different from the way people use it in there everday language

Chemistry

1 answer:

weqwewe [10]3 years ago

8 0

Answer:

Because Scientists Uses hypothesis and try tests and try proving their points while regular normal people use it to just state a statement

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A cup has a mixture of iron filings, sand, and salt. How could you separate theses 3 materials? Write out the procedures you wou

Anarel [89]

Explanation:

A cup of mixtures of iron fillings, sand and salt is a mixture who constituents are in the same phase i.e solid.

To separate them out we use the physical properties of the substances.

First spread out the mixture uniformly over a piece of paper or on the table.
Pass a bar magnet over it.
The iron fillings will become attracted to the magnet and separate from the mixture.
then pour water into the mixture of sand and salt
the salt will dissolve since sand is made up of quartz which are highly insoluble.
separate the water solution. Evaporate to dryness and recover the salt.
the sand is left behind and dried.

learn more:

Mixtures brainly.com/question/1832352

#learnwithBrainly

3 0

3 years ago

What letter represents the activation energy for the reverse reaction?

Bezzdna [24]

Answer: The correct answer is Option 4: U

Explanation:

Activation energy is defined as the energy that is given to a chemical system with potential reactants to produce products. It is represented as $E_{ac}$

It is represented as the energy from the reactants to the activated complex.

Reverse reaction is defined as the reaction in which the products formed become reactants and leads to the formation of reactants back.

So, here, the activation energy of the reverse reaction is the energy between the products and the activated complex, which is represented as letter U in the given graph.

Hence, the correct answer is Option 4: U

3 0

3 years ago

Read 2 more answers

The Gateway Arch in St. Louis, MO is approximately 630 ft tall. How many U.S. half dollars would be in a stack of the same heigh

Paraphin [41]

Answer:

The number of half dollars in the stack of the height of the Gateway Arch in St. Louis is 89,313 half dollars

Explanation:

The given height of the Gateway Arch in St. Louis = 630 ft

The thickness of each half dollar = 2.15 mm

By conversion of factors, we have;

1 feet = 304.8 mm

Therefore;

630 ft. = 304.8 × 630 mm = 192,024 mm

The number of half dollars that will stack up to 630 ft or 192,024 mm, is therefore, given as follows;

The number, n, of half dollars in the stack of the height of the Gateway Arch in St. Louis = The height of the Gateway Arch in St. Louis/(The thickness of each half dollar)

n = 630 ft/(2.15 mm/(half dollar)) = 192,024 mm/(2.15 mm/(half dollar)) = 89,313.49 ≈ 89,313 half dollars

The number of half dollars in the stack of the height of the Gateway Arch in St. Louis = 89,313 half dollars.

6 0

3 years ago

What is the mass of a crate if a force of 200 N causes it to accelerate at 8 m/s2? (formula: F=ma)

nexus9112 [7]

Answer:

m = 25 kg

Explanation:

F = ma

$\text{m} = \frac{F }{a }$