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tekilochka [14]
3 years ago
12

ASAP What is the main cause of any change of state?

Chemistry
2 answers:
forsale [732]3 years ago
7 0

Answer:

Hiya there!

Explanation:

Adding or removing energy from matter causes a physical change as matter moves from one state to another. ... Physical changes can also be caused by motion and pressure. Melting and freezing. When heat is applied to a solid, its particles begin to vibrate faster and move farther apart.

<em><u>Hope this helped!</u></em> :D

Sourced from "livescience.com"

Valentin [98]3 years ago
5 0

Answer:

Adding or removing energy.

Explanation:

Adding energy (heat) to liquid water causes it to become steam or vapor (a gas). And removing energy from liquid water causes it to become ice (a solid).

I hope you're talking about science lol but I forgot to check the subject. Hope this helps.

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Three beakers contain clear, colorless liquids. one beaker contains pure water, another contains salt water, and another contain
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First, we'll identify the beaker containing pure water as follows:
We'll take equal masses from each of the three beakers and measure the mass of each.
We'll then identify the density of each by using the rule : density =mass/volume
Pure water will be the liquid having density equal to 1 gm/cm^3

Then, we'll differentiate between the salt and sugar solution by measuring the conductivity of each solution. Salt solution is a good conductor while solution of sugar is a bad conductor.
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3 years ago
1. What do producers do, and what is another name for them?
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Producers are the foundation of every food web in every ecosystem—they occupy what is called the first tropic level of the food web. The second trophic level consists of primary consumers—the herbivores, or animals that eat plants. At the top level are secondary consumers—the carnivores and omnivores who eat the primary consumers. Ultimately, decomposers break down dead organisms, returning vital nutrients to the soil, and restarting the cycle. Another name for producers is autotrophs, which means “self-nourishers.” There are two kinds of autotrophs. The most common are photoautotrophs—producers that carry out photosynthesis. Trees, grasses, and shrubs are the most important terrestrial photoautotrophs.  In most aquatic ecosystems, including lakes and oceans, algae are the most important photoautotrophs.

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2 years ago
How are trials used in an experiment?
DENIUS [597]

Answer:Trials are repetitions of the same procedure. These are done for a couple of reasons: To minimize the impacts of errors done in any one trial by averaging multiple trials together. To minimize random effects and the effects of uncontrolled variables by averaging multiple trials together.

Explanation:

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3 years ago
What is the overall charge of the compound frfr
matrenka [14]

Answer:

As any molecular or ionic compound, 0 net charge, as a hypothetical diatomic cation, 2+

Explanation:

The question states that this is a compound, and any molecular or ionic compound would have a net charge of 0.

However, such a compound doesn't exist. Francium generally exists in nature having a 1+ charge in its cation form. Combining two francium ions would result in a Fr_2^{2+} species which is simply a diatomic ion but not a compound.

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3 years ago
Fields allow some objects to exert forces on each other even when they are not ________.
Debora [2.8K]

Answer:

in contact

Explanation:

Fields allow some objects to exert force on each other even when they are not contact with one another.

The region of space where the effect of a force is felt is know as a field.

  • Field forces for provides a non-contact means of exerting forces.
  • They objects do not have to be in contact before the force is felt.
  • An example is the gravitational force field.
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3 years ago
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