CHEMISTRY MIDDLE SCHOOL

What are examples of electrical energy

Answers

Answer 1
Answer: Electrical energy is made up of negative and positive particles. Lightning, lamp, TV, computer.
Answer 2
Answer: lamp
television because u need electric to work them

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A ecosystem is ______ if it can continue to function over long periods of time

Answers

A ecosystem is SUSTAINABLE if it can continue to function over long periods of time.

How does the law of conservation of energy relate to the processes going on in the water and in the plants?

Answers

Answer: Matter is not destroyed, only changes forms.

Explanation: Take my answer with a grain of salt, I'm not a genius in this type of stuff but, the law of matter states that matter is not destroyed, only changes forms. This can be applied to photosynthesis because the plants take water and use it to make glucose to eat.

Again, I'm not genius so take my answer with a grain of salt but, hope it at least helps a little.

The law of conservation of energy is a fundamental principle in physics that states that energy cannot be created or destroyed in an isolated system; it can only change forms or be transferred from one part of the system to another. This law applies to various natural processes, including those occurring in water and plants. Here's how it relates to these processes:

1. Photosynthesis in Plants:
- Plants undergo photosynthesis, a process in which they convert light energy from the sun into chemical energy stored in the form of glucose (a sugar) and other organic molecules.
- The law of conservation of energy applies here because the energy in sunlight is transformed into chemical energy within the plant. This chemical energy can be stored and later used for various plant functions.
- Photosynthesis also involves the conversion of carbon dioxide and water into glucose and oxygen, but the total energy within the system remains constant, following the law of conservation of energy.

2. Water in the Hydrologic Cycle:
- The hydrologic cycle involves the movement of water between various reservoirs on Earth, including oceans, land, and the atmosphere.
- Water evaporates from the surface (e.g., from oceans, lakes, and rivers) into the atmosphere due to the input of energy, primarily from the sun. This energy causes water molecules to change from a liquid to a gaseous state.
- When the water vapor condenses in the atmosphere, it releases heat energy (latent heat), warming the surrounding air. This energy is then transferred to the surrounding environment.
- Eventually, the condensed water falls back to the surface as precipitation, releasing the stored energy in the form of heat.

In both of these natural processes, the law of conservation of energy is upheld. Energy is transformed and transferred, but the total energy within the system remains constant.

What type of ion does an acid produce?

Answers

An acid produces hydrogen ions.
Acid releases H+(hydrogen ions) in solutions.

Hope this helps, have a great day ahead!

How do machines transfer and convert energy

Answers

Energy transformation or energy conversion is the process of changing one form of energy to another. In physics, the term energy describes the capacity to produce certain changes within a system, without regards to limitations in transformation imposed.

If we know the total energy in a system is 30 j, and we know the PE is 20 j, what is the KE?

Answers

30j-20j= 10j 

The kinetic energy is 10 joules

The total energy is equivalent to PE+KE. Therefore the answer is 10 joules.

Which organism is an herbivore?A.
grass

B.
bacterium

C.
spider

D.
grasshopper

Answers

Herbivores eat plants (producers) grass is a producer, spiders eat meat from bugs (carnivore) bacteria is idk. The answer is grasshopper because they eat plants.
answer is d. a grasshopper
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What is the mass, in grams, of 1.50×1021 molecules of aspirin, C9H8O4?Express your answer using three significant figures.
Please help meeeee!!!!!!!There is a big push right now in trying to rely on nonrenewable resources for the majority of our energy needs. Should we even try to power the world with 100% renewable resources? Justify your reasoning
1. In this investigation you will use a Mohr pipette to measure volume. Mohr pipettes use initial and final readings to determine the volume delivered. Explain how to avoid bias in the volume readings.2. You will be preparing a standard solution by mixing two solutions: 0.200 M Fe(NO3)3 and 0.00200 M KSCN. The concentration of the M Fe(NO3)3 solution is 100 times greater than the concentration of KSCN solution. What is the purpose of using a large concentration of Fe(NO3)3 and a small concentration of KSCN to make the standard solution? Explain.