Chemistry Middle School

Solar: converts mechanical energy of _____________ into electricity.
Wind
The Sun
Water

Answers

Answer 1
The sun.
Solar energy uses the suns power to create electricity
Answer 2
The sun :):):):):):):)

Related Questions

Tell me why in Louisiana it always gotta freaking have a hurricane

Answers

Why do so many storms target the state? The easterly winds typically blowing across Jacksonville in the summer flow out of the Azores/Bermuda high-pressure system which also steers many hurricanes into the Gulf. In June and October, storms are more likely to move up the Gulf from the south and southwest.

If you start with 5.5 liters of hydrogen peroxide (H2O2), how many molecules of oxygen gas (O2) will be produced?

Answers

Answer:

2.75 mol O2

Explanation:

2 H2O2 = 2 H2O + O2 is the formula

heres a picture of the work

Ans is 2 oxygen atoms

1. What is the geologic time scale? Explain how the geologic time scale is a model.
2. How many millions of years was the Paleozoic?
3. During what era did the dinosaurs live?
4. During what period where the first early human relatives found?

Answers

1.) the geologic time scale is a system of chronological dating that relates geologic structure to geologic events. it is a model because it measures and describes events and relationships in geologic history.

2.) the paleozoic period was roughly from 245 million years ago to 545 million years ago.

3.) the dinosaurs lived in the mesozoic era, specifically the triassic period, which was roughly around 230 million years ago.

4.) the first early human relatives were found roughly around d the neogene period, about 25 million years ago, and is in the cenozoic era.
This is the answer hope it will help you

Frozen ice caps in the Arctic Ocean are composed of?
A water vapor
B salt water
C fresh water
D a mixture of salt and fresh water

Answers

D


a mixture of salt and fresh water

What happens to salt water and fresh water when you try to mix them.

Answers

Answer:

the lighter fresh water rises up and over the salt water

Explanation:

this is because the salt water is denser

Answer:

When trying to mix fresh/salt water it leads to variable and dynamic chemical conditions, especially salinity because fresh water flowing into the estuary is less salty and less dense than water from the ocean, it often floats on top of the heavier seawater.

Explanation:

<3

some students observe four different lab investigations. The students record their observations in a table.
Investigation
Observations
1
A beaker of water is
heated on a hot plate. Bubbles form in
the water, and steam is given off.
2
Oil is added to a beaker of water. Oil forms a layer on top
of the water
3
Sand and iron filings are mixed in a beaker. A magnet is
then used to separate the iron filings from the sand.
4
A piece of chalk is placed in a beaker of vinegar Bubbles
form as a gas is given off.
Which investigation most likely involved a chemical reaction?

Answers

Answer:

Number 4 is an example of a chemical reaction

Explanation:

heThe chalk is reacting with the vingear which is creating a new substance. The new substance is the gas that the reaction gives off.

I think the number 4 is the right answer

Water freezes at 32 degrees

Group of answer choices

Fahrenheit

Celsuis

Kelvin

Answers

Answer:

Fahrenheit

Explanation:

Answer:

You should go to Cymath.com it really helped me out

Help me with an easy question worth 25 points

What makes a material dense if we are calculating the Speed of light in thousand miles per second.

Answers

Answer: Velocity

Explanation:

The density of a material affects the speed that a wave will be transmitted through it. In general, the denser the transparent material, the more slowly light travels through it. Glass is denser than air, so a light ray passing from air into glass slows down.

Answer:

C is most dense i think lol

Explanation:

How does resource extraction affect local and national economies?

Answers

Answer:

The direct channels by which extraction can affect the economy are of particular interest. The development of mines or oil and gas fields can result in significant shocks to a regional economy, generating jobs and drawing in capital from other regions and countries.

Explanation:

√225/√25 = ?? hurry please I'm stuck on it​

Answers

Answer:

√225/√25 =3

The answer is 3

Explanation:

Answer:

The answer is 3

Explanation:

Define the following terms

Uniformitarianism

&

trace fossil

Answers

Answer:

Uniformitarianism- A theory that geologic process that occur today are similar to those that have occurred in the past

Trace Fossil- A fossil of a foot or trail or other travel of an animal rather than of the animal itself

Uniformitarianism: the theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes.

Trace fossil: a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself

Given the following equation: Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)

If you start with 4.50 grams of Magnesium (Mg), how many grams of Hydrogen gas (H2) will you theoretically produce? If you actually produce 0.25 grams, what is your percent yield?

please help

Answers

25 gram , hope that helps you

The neighborhood swimming pool is 20 feet long, 8 feet wide, and 4 feet deep. Which formula below should be used to find how much water the pool can hold?

Answers

Answer:

The formula to use is

VOLUME=LENGTH×BREADTH×HEIGHT

PLEASE GIVE BRAINLIEST

What is the main function of messenger RNA?
a. it adds amino acids to a growing protein chain
b. it carries the information neccesary for protein synthesis
c. it carries the information neccesary for dna replication
d. it carries information that causes deletions and other mutations

Answers

The right answer is C


Messenger RNA (mRNA) carries the genetic information copied from DNA in the form of a series of three-base code “words,” each of which specifies a particular amino acid. 2. Transfer RNA (tRNA) is the key to deciphering the code words in mRNA.

Answer:

it carries the information neccesary for dna replication

PLS HELP ME IT IS SUPPOSED TO BE DONE IN 10 MINS PLS In a two paragraph (it can be a 2 sentence paragraph) extended response, summarize the ways in which technological advances and enforcement of safety and environmental laws and regulations are attempting to avoid or reduce the negative effects of finding, producing, and transporting oil.

Answers

Answer:

Environment: They must be supplied and used in ways that have minimal safety and environmental stewardship have advanced safety regulations and practices, promulgated rules for reducing VOC emissions from oil and gas production and ... disposal protocols are similarly reducing negative impacts to air and water.

Explanation:

The distance time graphs for two objects are shown below: look at the picture. Which statement is true? Both objects move at variable speeds. Both objects move at a constant speed. Object A is moving at constant speed but Object B is moving at variable speed. Object A is moving at variable speed but Object B is moving at constant speed.

Can you get this done before 10:40 pls

Answers

Answer:

The last statement is correct

Explanation:

Make a claim about whether or not a piece of pottery is an example of a fossil? Summarize evidence to support your claim and explain your reasoning.

Answers

Answer:

A piece of pottery is deemed NOT a fossil because fossils are the remnants of a once living thing,a piece of pottery is a historic item,a relitivitely old item.

pottery is more of something made and a fossil is something that’s already converting into a solid that happens naturally unlike pottery.

Explain how you could use the solubility of a substance to make a saturated solution.

Answers

Answer:

Add solute to liquid until dissolving stops.

Evaporate a solvent from a solution until the solute begins to crystallize or precipitate.

Add seed crystals to a solution that is supersaturated.

Explanation:

What type of worm has a circulatory system?
Nematodes
Segmented worms
Roundworms
Flatworms

Answers

Your answer will be Segmented worms. Segmented worms have a closed circulatory system in which blood is enclosed in blood vessels.

Describe the concentration of hydronium ions and hydroxide ions when a base is added slowly to a white vinegar solution. The pH of white vinegar is 3.1. Explain

Answers

Answer:as you add the base it added some  PH. The Ph lever of white winegaer is2.4 - 3.4

Explanation:

Mr. Rogers wanted to study the affect of different types of music would have on students ability to complete the IA. What is his dependent variable? What Is his independent variable ?

A. classrooms
B. types of music
C. IA scores
D. students

Answers

C because it can change
C is the answer:)))))))))

A disease caused by the inflammation of mucus membranes inside the bronchial tubes. There are more than 3 million U.S. cases a year.

Answers

Inflammation can have causes that aren't due to underlying disease. Examples include injuries such as sprains and strains, overuse, or insect bites.

A scientist designs some experiments to record how various substances change. She then reviewed her results. Which of the investigations listed below is an example of how the substance changed chemically?


Sodium metal reacts violently and explodes with water.


After heating aluminum in a crucible, it began melting at 1200 degrees F


Hydrochloric acid is stored inside plastic containers.


Grinding Copper sulfate allowed it to be dissolved much quicker.

Answers

Answer:

Sodium reacting with water and exploding.

Explanation:

the others are just melting, dissolving and storing a chemical. also I know its a chemical reaction because its the only answer that involves more than one chemical and has an actual change.

hope this helps :)

A science class performed an investigation to model heat absorption with sand and water. The class put a beaker of sand and beaker of water under a heat lamp. The data to the left were the results after 10 minutes of heating. Using the information in the data table to the left, is the data the class collected valid?

Answers

Answer:

mkhcxfjvuh jb

Explanation:

 ,bnb kj

hope this helps

Which of the following is NOT a way of making heat?
A. turning on an electric light
B. eating a sandwich
C. rubbing sticks together
D. melting an ice cube

Answers

If this is serious the answer is B....

Answer:

b. You should prolly know this tho lol

Explanation:

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