Based off of the simulation pulley gizmo; how many people did it take to lift the armchair with a fixed pulley? (Look at Activity A question 2)
Question 5 options:
1
3
4
5
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Answer:
IN WHICH GRADE YOU ARE????
Related Questions
Think about the ecosystem that you live in.
Write a response below describing it in complete sentences.
4)
Use each of these terms correctly in your description:
• community
• ecosystem
• biotic
• population
• individual
• abiotic
Answers
Answer:
this is an answer for YOU to answer. this is about YOUR ecosystem
Explanation:
just say what it's like, is it a community? is it populated? explain.
Through all the food chain, food web, chemical cycles, etc., biotic and abiotic forces interact within an ecosystem. Therefore, the functional and structural unit of nature is the ecosystem.
What is ecosystem?The functional and structural unit of nature is the ecosystem. This relationship between living and nonliving elements is handled by the ecosystem. All living things, including plants, animals, and microorganisms, rely on non-living substances to survive and keep the natural world in balance.
Individual, population and community play important role in running a ecosystem. Terrestrial Ecology: A terrestrial ecosystem is an ecosystem that is found on land. Grassland, desert, and tundra ecosystems, for instance.
Therefore, the functional and structural unit of nature is the ecosystem.
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In class we made salt crystals. To do this we put a supersaturated solution of salt into a glass of water. After a few days the water evaporated and the salt crystals were left on the paper cutouts. When the salt dissolved in the water was this a physical change or a chemical reaction? Please explain your answer in detail.
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Answer:
Dissolving a solid in liquid, such as table salt in water, is a physical change.
Explanation: Its a physical change because only the state of the matter has changed
speed =________
ate divided by time
rate divided by distance
distance divided by time
time divided by rate
I need answer asap! Plz someone help ! Ill give brainliest!
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Answer:
Distance divided by time is the answer. :)
Explanation:
A food scientist is determined to create a mango that looks exactly like a mango but tastes like salmon. Can this be achieved through artificial selection? Why or why not?
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Answer:
depends on the artificial 'materials' used and the food scientist
Explanation:
If the food scientist is skilled enough and works hard enough this it might be possible but this does seem like a difficult task i personally doubt that this could be done until next few years. :)
why does atumn start in diffrent months of the year in north america and south america
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Answer:
because the sun is further away due to the earth's axis
PLS HELP (science)
Match the following molecules with the number of atoms they contain.
1. 2Fe
seven
2. 2Al 3O 2
eight
3. 4O 2
two
4. 5C
five
5. H 2SO 4
ten
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Answer:
hello I will answer ur question if u answer mine
Explanation:
2. Ten
3. Eight
4. Five
5. Seven
Just count the number number of substances, the subscript(number at the bottom) tells you how many of it there is. Then you check if there is a coefficient(number in front of all the substances) and if there is a number you multiply you previous answer by it. The coefficient tells you how many molecules there is. Your final answer is the number of atoms!
In this project, you will practice calculating work and speed using the proper formula. You will also use a data table to record and analyze your data. For each question, you will complete a row in your data table to record the details, and your results. Don't forget to use proper units of measurements in all of the parts of your table!
pls help asap mark brainyist can't spell sorry
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Answer:
CHECK THE IMAGE
Explanation:
Helena uses the same force to move an object that has a mass of 12 kg and an object that has a mass of 5 kg. She predicts the 12 kg object will have a greater change in motion. Is she correct?
No, the object with the smaller mass will have a greater change in motion.
No, both of the objects will have an equal change in motion.
Yes, the object with the larger mass will have a greater change in motion.
No, neither object will have a change in motion.
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Answer:
No, the object with the smaller mass will have a greater change in motion.
Explanation:
Hope this helps!
How does the Coriolis effect impact the Gulf Stream and the Brazil Current?
It turns the Gulf Stream southwest and the Brazil Current northeast.
It turns the Gulf Stream northwest and the Brazil Current northeast.
It turns the Gulf Stream northeast and the Brazil Current southwest.
It turns the Gulf Stream northeast and the Brazil Current northwest.
Answers
Answer:
Honestly, I think it is C.
Explanation:
Brazil is in the south, so that's why it is C.
hope this helped.
I HAVE A D- IN SCIENCE PLEASE HELP
Complete the sentence.
In chemical reactions, a product is _________.
A. any substance that is to the left of the arrow
B. any substance that is made of the greatest number of atoms
C. any substance that is made from the least number of atoms
D. any substance to the right of the arrow
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Answer:
D - Any substance to the right of the arrow.
Explanation:
A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.
GIVING 40 POINTS PLZ HELP!!!!!!!!
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Answer:
to find heart rate put 2 fingers on your wrist or neck also what one do you need help with
Explanation:
help pls due todayyyy
Answers
Answer: Below
Explanation:
Steal wool + oxygen (fire): The steel wool is a grayish color and has a rough surface. Oxygen is transparent It looks like a powder, and like if it was rusted steel wool but then broken apart and turned into a powder Well Iron oxide is 7 grams and steel wool combined is 7 grams so you can say that the mass was conserved Yes, this is a chemical change because the steel wool rusted and rust is a chemical change, so iron oxide is cause because if a physical change.
Egg + Heat : The egg has a yellow yolk in the middle while there is some type of liquid at the border of the yolk, but it is clear, the heat is hot but transparent The egg turned into a delicious food called an omelet what was yolk staid as a liquid but got a tad harder, but the transparent border around it turned white It was conserved because the eggshell was 4 grams and the fried egg is 41 grams It is a chemical change because it results in the formation of new particles, and the chemical bonds break up and new ones are formed.
Water + Heat The water is a clear liquid, while the heat is very hot but transparent The water turned into a type of oxygen -Water Vapor- If 5 g of water becomes a gas it becomes 5 g of water vapor. The mass of the liquid water is simply transferred into the mass of the newly formed water vapor. There was no chemical reaction because the water vapor can be turned back to water also it just changed from a liquid to a gas and did not change its composition
Zinc + Hydrogen Chloride Zinc: a white/silver metallic solid. Hydrogen chloride (dilute hydroelectric acid) a transparent, colorless liquid with a very low pH (acidic). Zinc "dissolved" in hydrogen chloride, while emitting a colorless gas. The liquid remains a colorless liquid, possibly still having a low pH from the unused acid. The colorless gas collected in a test tube gives a popping sound when ignited with a burning wooden splint, so it is not air embedded in the zinc, nor dissolved in hydroelectric acid. Well although the zinc chloride is 12 grams and not 15 the gas that was released was 3 grams and as we all know 3 + 12 is 15 so you could say that the mass was conserved The production of a new substance (most probably hydrogen) from the reaction of the two reactants. When a few drops of the liquid product are evaporated on a watch glass, a white residue is left.
When a few drops of the liquid hydroelectric acid are evaporated on a watch glass, there is no residue. This proves that a new product (hydrogen gas), (white powder, zinc chloride) is produced instead of zinc being physically dissolved in hydroelectric acid.
Sodium Hydroxide + Copper Sulfate Sodium hydroxide is a turbid solution and copper sulfate is in form of bright blue crystals. When their solutions are mixed with each other, a pale blue precipitate of basic copper hydroxide & a solution of neutral salt sodium sulfate will be formed. The sodium hydroxide and the copper sulfate combined make a total of 67 grams and the product is split because the sodium sulfate is 47 grams and the copper hydroxide is 20 grams but all together it is still 67 grams so you could say that the mass was conserved The proof of the reaction is the appearance of pale blue precipitates of basic copper hydroxide & a solution of neutral salt sodium sulfate.
Please help!!! Hydrogen and oxygen undergo a chemical reaction to form water. How much water will be created if hydrogen has a mass of 3.56 g and the oxygen has a mass of 25.32 g?
Actual answers only please :)
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Answer:
22.88g
Explanation Hope this helped <3
HELPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!! 30 POINTS!!!!!!!!!!!!!!
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Answer:
What is this please send questions properlythen i will answer it properly
List the communities in a successional sequence of secondary succession?
Answers
The given communities can be ordered in the secondary succession as grass, shrubs, small trees and large tress.
What is secondary succession ?The life cycle of a plant is characterized by secondary ecological succession. Secondary succession, in contrast to primary succession, is a process initiated by an occurrence such as a forest fire, harvesting, hurricane, etc. that reduces an already established ecosystem (such as a forest or a wheat field to a smaller population of species.
As a result, secondary succession occurs on preexisting soil, whereas primary succession typically takes place in a location lacking soil. Many elements, including trophic interaction, starting composition, and competition, might influence secondary succession. Trade-off with colonization
Therefore, the given communities can be ordered from the small level to higher level as grass, shrubs, small trees and large tress.
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Your question is incomplete. But your complete question is as follows:
List the given communities in a successional sequence of secondary succession? shrubs, small trees, grass, large tress.
A submarine fills a special storage area known as a ballast with water in order to increase its density. This allows it to dive deeper in the ocean. When a submarine needs to rise rapidly, compressed air is used to push the water out of the ballast. What effect does replacing the water in the ballast with air have on the submarine?
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Answer:
the submarine floats after replacing the water with the compressed air
Answer:
The submarine will rise.
Explanation:
To get a submarine to surface, the main vents in the top of the tank are closed and high-pressure compressed air is blown into the ballast tanks, forcing the water out through the flood ports at the bottom of the tank. This increases the vessel's displacement.
What type of fossil forms when the impression from the remains of an organism is filled in with soil and hardens into the shape of the original organism?
Answers
Answer:
i belive its a "Mold fossil"
Explanation:
I NEED HELP ASAP PLZZZZ
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Answer: 2 :)
Explanation:
I took the test
Plz help! Write your answer in complete sentences ! Write a proper answer! 1st one to answer will get a brainliest!
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Answer:
the name for CaCO3 is Calcium Carbnate, and its relations with coral reefs is that the process for making said compuond happens within coral, and is considered the building block for coral reefs.
Explanation:
hope this helps!
with the development of technology why is muscle atrophy occurring more often what can you do to stop it THIS IS A SCIENCE QUESTION
Answers
Answer: Technology is causing people to sit around more while using it. Therefore people are not exercising as much. This causes the strength of muscles to go away. A way to help stop this is to get exercise for at least one hour a day.
Explanation:
An object has a mass of 960 g and a volume of 15cm3 what’s the density?
Answers
Explanation:
density = mass ÷ volume
mass = 960g
volume = 15³ = 15 × 15 × 15
= 3375 cm
density = 960 ÷ 3375
= 0.28 g/cm³
The Statue of Liberty is made of copper metal. Copper metal has the physical property of being orange in color. Over years of being exposed to moist air, the surface of the statue has begun to form a green coating. Is the green coating the product of a physical or chemical change? Explain how the green layer is formed.
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Answer:
The statue is made of a metal called copper. Over time, the copper has gone through a chemical change. This is called a chemical reaction.
Explanation:
i dont think this will help...
Answer:
Chemical.
Explanation:
Pretty sure its chemical, due to it oxidising which is a chemical reaction.
Oxygen in the air can react with wood when a match is burned. Ash is produced.
Which statement would be true?
A. The atoms of the ash did not exist before.
B. Ash has similar properties to oxygen.
C. The atoms of wood and oxygen disappear during the burning.
D. Ash is a different substance than wood.
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Answer:
D. Ash is a different substance than wood.
Answer:
D the atoms of ash did not exist before
Explanation:
because I jnwo .... k
So im very confused!!! if you want to answer then plz read the instructions and plz give proper answer !!! Need help asap!!!!!!!!!!!!!!!!
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Second answer is that the spring, when pushed down, has the POTENTIAL to spring back up and exert energy. It’s potential energy.
Hope this helps
PLS HELP DUE SOON(Ignore that wet thingy on my paper it’s my matcha latte it go on it lol)
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Answer:
well for
1. Because cytoplasm is made of a jelly like consistent
and
2. wastes product are transported by endoplasmic reticulum ,from organelles to outside cell ,so if cell size is big ,it will take more time in transportation and vice versa
Answer: Hello
Explanation: Hello
Plz, help! I need help with questions a and b! Plz, write your answer in complete sentences! And the first person to answer will get a brainliest! Plz, NO SCAM links!!!!!!!
Answers
FOR A : Once the tennis ball and the board are in motion, they will continue in motion in the same direction at the same speed unless acted upon by an unbalanced force. This demonstrates Newton's first law of motion.
FOR B: When the accelerating ball hits the resting pins, it causes them to become unbalanced forces and they accelerate into each other
What type of force is known for exerting an upward force on objects in a fluid?
1. buoyant force
2. friction force
3. gravitational force
4. magnetic force
The First person to answer will get the brainliest!!!!!!
Answers
Answer:
A. buoyant force.
Explanation:
It is like a buoy, but it is force pushing an object while in water.
hope this helped.
can someone solve this question please
Answers
Answer:
MgO + 2 HNO3 → Mg(NO3)2 + H2O
Explanation:
What will a soccer player need to do to change a ball’s position?
1. He must apply gravity to the ball so that the ball will move.
2. He must weigh the ball to determine the motion that needs to occur.
3. He must set the ball in motion by applying a force in the desired direction.
4. He must identify the location of the ball.
First one to answer will get brainliest!
Answers
Answer:
He must set the ball in motion by applying force in the desired direction.
Explanation:
That is how the soccer player will change the ball's position.
Have a good day :)
Answer:
4. He must identify the location of the ball.
Explanation:
If a soccer player needs to change his position, then he will need to identify the location of the ball.
hope this helped.
How does the law of conservation of mass apply to this reaction: Mg + HCl → H2 + MgCl2?
A.) Hydrogen and chlorine need to be balanced. There is an equal amount of magnesium on each side
B.) The equation needs to be balanced. There are fewer hydrogen atoms in the equation than magnesium or chlorine.
C.) Only the hydrogen needs to be balanced. There are equal numbers of magnesium and chlorine.
D.) The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.
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Answer: The correct answer is A. Hydrogen and chlorine need to be balanced. There's an equal amount of magnesium on each side.