What characteristic of rivers at their source gives them so much power to shape the land

What type of reaction happens in a nuclear power plant?

Zanzabum

When a large fissile atomic nucleus such as uranium-235 or plutonium-239 absorbs a neutron, it may undergo nuclear fission. The heavy nucleus splits into two or more lighter nuclei, (the fission products), releasing kinetic energy, gamma radiation, and freeneutrons

6 0

3 years ago

A student has a sample of a solid dissolved in a liquid. The task is to separate the mixture into its pure components. What ques

Lunna [17]

Answer:

When two or more substances, that do not react chemically, are blended together,

the result is a mixture in which each component retains its individual identity and

properties.

The separation of the components of a mixture is a problem frequently encountered

in chemistry. The basis of the separation is the fact that each component has a

different set of physical and chemical properties. The components are pure substances

which are either elements or compounds. Under the same conditions of pressure and

temperature, the properties of every sample of a pure substance are identical. Each

sample melts at the same temperature, boils at the same temperature, has the same

solubility in a given solvent, etc.

Although these and other characteristics can be used to identify a particular

substance, we will be concerned, in this experiment, with the separation of a mixture

into its components, not with the identification of the substances. Techniques used to

separate mixtures rely on differences in the physical properties of the components.

Techniques useful for the separation of mixtures include the following:

DISTILLATION is the purification of a liquid by heating it to its boiling point, causing

vaporization, and then condensing the vapors into the liquid state and collecting the

liquid. Separation of two or more liquids requires that they have different boiling

temperatures. All boiling temperatures can be reduced by decreasing the pressure

on the liquid.

EXTRACTION is the removal of one substance from a mixture because of its

greater solubility in a given solvent.

FILTRATION is the process of removing or "straining" a solid (the chemical term is

precipitate) from a liquid by the use of filter paper or other porous material.

DECANTING is the pouring of a liquid from a solid-liquid mixture, leaving the solid

behind.

CENTRIFUGING is the process of separating a suspended solid from a liquid by

whirling the mixture at high speed.

SUBLIMATION is the physical property of some substances to pass directly from

the solid state to the gaseous state without the appearance of the liquid state. Not

all substances possess this characteristic. If one component of a mixture

sublimates, this property may be used to separate it from the other components of

the mixture. Iodine (I2), naphthalene (C10H8, mothballs), ammonium chloride

(NH4Cl) and dry ice (solid CO2) are some substances which sublime.

CHROMATOGRAPHY is the process of separating a mixture by the distribution of

its components between two phases, one phase being stationary and the other

phase moving. Some examples of chromatography are gas chromatography, paper

chromatography, and thin-layer chromatography.

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3 years ago

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1 of 15

Svetlanka [38]

Answer:

#2 The writer of "Harrison Bergeron," Kurt Vonnegut, seems to believe that the suppression of individuality within a society...

Question 3 options:

is necessary to maintain order and prevent chaos.

allows the government to unfairly subdue and control its citizens

benefits the general public by creating a more equal society

gives the people more power and influence in the government

#3 Which statement BEST expresses the theme of this short story? Narrow your choices and think carefully!

Question 4 options:

Attempting to achieve complete equality will only result in widespread dissatisfaction and lack of creativity.

The government should encourage everyone to hide their differences in order to have a more peaceful and equal society.

Forcing uniformity on people doesn't result in equality, but rather causes conflict and unhappiness.

People don't realize how important individuality is until they have what makes them different taken away.

PART A: How do the different handicaps contribute to the theme of the story?

Question 5 options:

They show how being unique can be dangerous to yourself and the people around you.

They emphasize how the most ordinary people are often the most valued in a society.

They stress how the work towards achieving total equality won't be easy or pleasant.

They illustrate how much must be done to make the most unique and talented individuals conform.

PART B: Which section from the text best supports the answer to Part A?

Question 6 options:

“He began to think glimmeringly about his abnormal son who was now in jail, about Harrison, but a twenty-one-gun salute in his head stopped that.” (Paragraph 21)

“he tried. That's the big thing. He tried to do the best he could with what God gave him. He should get a nice raise for trying so hard.” (Paragraph 39)

“And it was easy to see that she was the strongest and most graceful of all the dancers, for her handicap bags were as big as those worn by two-hundred pound men.” (Paragraph 40)

“Diana Moon Glampers loaded the gun again. She aimed it at the musicians and told them they had ten seconds to get their handicaps back on.” (Paragraph 79)

Which statement best expresses the central idea in the article "Proposed Treatment to Fix Genetic Diseases Raises Ethical Issues"?

Question 7 options:

Scientists have discovered a way to prevent genetic defects in babies, but some believe genetic development should be left to nature

Scientists have discovered a way to prevent genetic defects in babies, but some worry that the process could be used for great economic gain

Scientists have discovered a way to prevent genetic defects in babies, but the method is against many families’ religions

Scientists have discovered a way to prevent genetic defects in babies, but the process is still very risky

The primary purpose of the article is to...

Question 8 options:

inform

entertain

narrate

persuade

PART A: In paragraph 3 and paragraph 24, what is meant by the phrase “designer babies”?

Question 9 options:

Babies that are bred to be particularly attractive

Babies whose DNA has been altered to enhance a specific positive trait

Babies whose DNA has been altered to avoid disease

The biological children of genetic researchers

PART B: What detail from the text best supports the answer for Part A?

Question 10 options:

“…the research would create an egg with healthy mitochondrial DNA (mtDNA).” (Paragraph 4)

“First of all, the baby would be born with genes from three different people… (Paragraph 18)

“…we're going to allow inheritable genetic changes to make healthier children…” (Paragraph 25)

“…we’re going to allow these kinds of genetic engineering experiments to make children who are more intelligent or more athletic or have perfect pitch…” (Paragraph 25)

The primary purpose of Gavin DeGraw's song "I Don't Want To Be" is to...

Question 11 options:

inform

entertain

narrate

persuade

When DeGraw says, "I'm tired of looking 'round rooms /Wondering what I've got to do /Or who I'm supposed to be" he is saying that...

Question 12 options:

constantly reinventing himself is exhausting, so he has decided to conform to the most commonly accepted standards

conforming is easier than being a unique individual

he is no longer willing to conform to meet the expectations of whomever he is with at any given time

he doesn't care if he has any friends or not

Explanation:

ummm maybe this help

8 0

2 years ago

Atoms of one element are converted to atoms of another element through

lubasha [3.4K]

Atoms of one element are converted to atoms of another element through transmutation or nuclear transmutation.

6 0

2 years ago

The leaves on a green plant soak up sunlight to make food. A cow's stomach digests grass that was eaten. These are examples of w

Nostrana [21]

Metabolism since it creates energy.

8 0

2 years ago