Explanation :
Absorption coefficient of a material determines how much sound is absorbed by the material.
To build a soundproof room, Heavy curtains and carpet can be used. They reduce reverberation.
Reverberation means an echoing sound which persists for some time. For example, when we bang on a huge piece of metal, we hear the reverberation even after we stop banging.
Hence, option (A) and (D) are correct.
Concrete, carpet, and heavy curtains would be the best materials to choose in order to absorb the most sound in a soundproof room.
Explanation:If you were trying to build a soundproof room, concrete, carpet, and heavy curtains would be the best materials to choose in order to absorb the most sound, based on their coefficient of absorption.
Concrete is a dense and solid material that effectively absorbs sound waves. Carpet and heavy curtains also have a high coefficient of absorption as they are made from materials that can trap and absorb sound.
Wood, on the other hand, is a harder material that reflects sound rather than absorbing it, making it less effective for soundproofing purposes.
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Scientists develop knowledge by making about the natural world that may lead to a scientific question
Answer:
Scientists develop knowledge by making observations about the natural world that may lead to a scientific question
Explanation:
Science has been able to change history and develop some elemental theories that explain how everything works by following some steps. These steps are known as the "scientific method", which can be described as a systmatic way of learning about the world and answering questions. The most basic step that allow scientists to develop questions about something is the observation, by observing things doubts will emerge. This will lead to the next step that is asking questions. In this way your research problem will be more accurate and therefore easier to study. The following steps are: form an hypotesis, make a prediction based on the hypotesis and test the prediction.
If an atom had a nucleus 1 ft in diameter, what would be the diameter of the atom, in miles? (1 mi = 5,280 ft)
If an atom had a nucleus 1 ft in diameter, the diameter of the atom would be approximately 10 miles. This is based on the fact that a typical atom is about ten thousand times larger in diameter than its nucleus.
In physics, we learn that the size of a nucleus is extremely small compared to the overall size of an atom. A lead nucleus with a mass number of 208 has a diameter of about 13 femtometers (fm), which is 10-15 meters, and this is ten thousand times smaller than the typical atom's diameter. If we scale up the nucleus to 1 ft, we keep the same ratio of 1 ft to 10 thousand ft or, in other words, 1 ft to nearly 2 miles (10,000 ft divided by 5,280 ft per mile). Hence, if the nucleus's diameter is 1 ft, the atom's diameter at the same scale would be around 10 miles.
12080 gallons per month into liters per hour
List 2 examples of poor scientific mythology found in the student lab report
Use examples to explain how the atmosphere interacts with two other of Earth's spheres. Explain the interaction for each using complete sentences.
Answer:
Plants in the biosphere consume carbon dioxide from the atmosphere and emit oxygen back into the atmosphere as a result of photosynthesis. Animals consume oxygen from the atmosphere and emit carbon dioxide back into the atmosphere as a result of cellular respiration.
Explanation:
edg2020
It should be noted that the Earth has four major subsystems which are the lithosphere (land), hydrosphere (water), atmosphere (air), and biosphere.
The spheres of the Earth influence each other and they interact. For example, rain falls from the cloud in the atmosphere and then falls on the land. This shows that there's an interaction between the hydrosphere, lithosphere, and atmosphere.
Also, plants that are in the biosphere consume carbon dioxide that comes from the atmosphere. The plants then give back oxygen which is used for respiration by the animals and humans.
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Pressure increases with depth towards the center of earth. In which layer would you expect pressure to be the greatest.
an object moving at a constant velocity travels 274 m in 23 s. what is its velocity?
Answer:
Velocity, v = 11.91 m/s
Explanation:
It is given that,
Distance covered by the object, d = 274 m
Time taken, t = 23 s
We need to find the velocity of the object. It is given by distance covered divided by total time taken i.e.
[tex]v=\dfrac{d}{t}[/tex]
[tex]v=\dfrac{274\ m}{23\ s}[/tex]
v = 11.91 m/s
So, the velocity of the object is 11.91 m/s. Hence, this is the required solution.
A property that describes how easily a substance undergoes chemical changes
Chemical reactivity is the property that describes how easily a substance undergoes chemical changes. It relates to the instability of a substance, with more reactive substances typically being less stable. Factors influencing chemical reactivity include electron configuration, the presence of unpaired electrons, and the substance's position in the Periodic table.
Explanation:The property that describes how easily a substance undergoes chemical changes is known as chemical reactivity. This reactivity indirectly relates to how unstable the substance is, with less stable substances generally being more reactive. For instance, noble gases like helium or neon are very stable and exhibit low reactivity, while alkali metals like sodium are relatively unstable and show high reactivity.
Chemical reactivity can be influenced by several factors, including the particular substance's electron configuration, the presence of unpaired electrons, and the substance's position in the periodic table. Therefore, understanding a material's chemical reactivity can greatly help predict its behavior in various situations, particularly in reactions.
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Which law represents a balanced chemical equation? Avogadro’s hypothesis, ideal gas law, law of conservation of mass, Newton’s first law of motion, Newton’s second law of motion
Answer:
Law of conservation of mass.
Every chemical equation adheres to the law of conservation of massIt state that "Matter cannot be created nor destroyed. Therefore there must be the same number of atoms of each element on each side of chemical equation.Charcteristics Similarities Differences
Mercury
Venus
Earth
Mars
List and briefly describe the characteristics (interior and surface) of each terrestrial planet in the Characteristics column.
in the early 1900s Alfred Wegener noticed that some of earths continets looked like they might fit together like a jigsaw puzzle he also observed that the continets that looked like they fit together had similar plants animals and rock formations from this evidence Wegener reasoned that earths continents were all once a part of one big supercontinent what type of scientific thinking did wegener employ to develop this theory theory
A. inductive reasoning
B. deductive reasoning
C. skeptical reasoning
D. subjective reasoning
Its A. inductive Reasoning. He had no idea that it was true, but he assumed
A galaxy, such as the Milky Way Galaxy, is very small compared to
A.
the Solar System.
B.
the planet Jupiter.
C.
the Sun.
D.
the Universe.
Answer:
D. The universe
Explanation:
just got it correct
We may observe a sphere with a diameter of around 28 billion light years because the cosmos is enormous and has been expanding for about 13.8 billion years at a rate that is only a small fraction of the speed of light. Thus, option D is correct.
What Milky Galaxy, is very small compared to the Universe?Even just exploring our galaxy would take countless millennia, let alone the entire universe. The Hyperion Supercluster galaxy supercluster is another old formation.
The largest and most numerous galaxy is the universe. A galaxy is a massive cluster of gas, dust, billions of stars, and their solar systems that are all bound together by gravity.
Therefore, No, every solar system and galaxy can be found in the cosmos. The Milky Way Galaxy contains hundreds of billions of stars, including our Sun, while the universe itself is made up of billions of galaxies.
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Calculate the velocity of the object in the graph during the following time interval 0-6 seconds. Also, during which time interval is the object accelerating and how can you tell?
I need help with this physics question
what is a good hypothes is for this problem statement:Problem statement: Does changing the amount of water affect the time it takes water to boil?
what is the magnitude of velocity called?
Cookware companies have been using a chemical called C-8, which helps to create a nonstick coating to pans. However, the Environmental Protection Agency (EPA) recently claimed that the use of C-8 in the manufacturing of nonstick cookware should be discontinued because studies show it causes cancer.
The one who might benefit financially, the most from the EPA's claim are cookware manufactures who make pans out of steel only.
What is chemical?A compound or element which reacts with the other element to form a product.
Chemicals are generally toxic because they harm our skin, when they come in contact with the body. When exposed to a toxic substance, gasoline can affect your health. Since, drinking gasoline can cause burns, vomiting, diarrhea and can cause death.
Cookware companies which have been using a chemical called C-8, that helps to create a nonstick coating to pans. Since, the Environmental Protection Agency (EPA) recently claimed that the use of C-8 in the manufacturing of nonstick cookware should be stopped. The reason for this discontinuation is that studies show it causes cancer.
There are also the companies who made cookware out of steels only. They are most benefited by this claim.
Thus, Steel cookware manufactures are benefited by EPA claim.
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Two examples of renewable energy resources
What slows down neutrons?
Sam and Ben stand on either side of box. They use equal force to push on the box. They observe the box does not move. How did they get this result? A) Balanced forces do not affect an object's motion. B) Unbalanced forces do not affect an object's motion. C) Balanced forces do affect an object's motion by changing its position. D) Unbalances forces do affect an object's motion by changing its position.
A miner of mass 90kg travels down a slide calculate the potential energy of the miner when he moves15m vertically downwards
The potential energy of the miner when he moves 15 meters vertically downward is 13,230 Joules.
How to solve for the potential energyTo calculate the potential energy of the miner as he moves 15 meters vertically downward, you can use the formula for gravitational potential energy:
Formula is given as m x g x h
Now, calculate the potential energy:
[tex]\[PE = 90 \, \text{kg} \cdot 9.8 \, \text{m/s²} \cdot 15 \, \text{m} = 13,230 \, \text{Joules}\][/tex]
The potential energy of the miner when he moves 15 meters vertically downward is 13,230 Joules.
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3) A defense football player on one team tackles the other team’s quarterback, who is running down the field. The quarterback is pushed to the ground by the defensive player. 4) apply Newton’s first law to explain what happened?
The force generated by the defensive player has more magnitude and as such would push the quarterback to the ground.
A force can be defined as a push or pull of an object (body), which typically results in a change of motion due to the interaction of the object (body) with another.
Newton's First Law of Motion is also referred to as Law of Inertia and it states that an object (body) in motion would continue in its state of motion at a continuous velocity (in the same speed and direction) or if at rest, it will remain at rest unless it is acted upon by an external force.
In this context, an unbalanced force is generated by the quarterback and the defensive player, but the defensive player's force is an external force with more magnitude and as such would push the quarterback to the ground.
According to Newton's First Law of Motion, the quarterback was pushed to the ground due to an external force, generated by the defensive player.
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WILL MARK BRAINLIEST AND THANK
Two locations have different water vapor content in their atmosphere. Which of these is likely to be recorded?
Difference in rates of runoff
Difference in air pressure
Same humidity levels
Same temperature
Difference in air pressure
Explanation:Humid air has lower air pressure because humid air contains lots of water. As more and more water enters the atmosphere it displaces other, heavier molecules. As a result air that is humid is much lighter. Since humid air is lighter, it has less weight to press down with so it has lower pressure.
terrestrial biomes of the world what is the answer ?
Terrestrial biomes are regions categorized by climatic conditions that define the ecosystems within them. Key factors are temperature and precipitation, which influence the biodiversity, especially the suitability for certain plants and animals. Examples of biomes include grasslands, forests, deserts, and tundra.
Explanation:The terrestrial biomes of the world include diverse regions with distinct climates and ecosystems. Terrestrial biomes are categorized mainly by climate, which shapes the biodiversity within them. Factors such as temperature and precipitation are crucial in determining the types of plants and animals that can survive in each biome. For instance, in the tundra, the lack of warmth and stable temperatures prevent cold-blooded animals such as amphibians and reptiles from thriving due to their inability to maintain a constant body temperature.
Grasslands include ecosystems like the savanna and temperate grasslands, defined by their dominant ground cover of grass.Forests, such as tropical, temperate, and boreal forests, are primarily composed of trees and other woody vegetation.Deserts are arid regions with minimal precipitation, covering a significant portion of Earth's surface.Tundra is characterized by extremely low temperatures, a lack of nutrients, and a short growing season.The same type of biome can occur in different geographic locations, provided the climate is similar. Therefore, the worldwide distribution of biomes can be understood by examining patterns of climate across the globe.
A (n) ______ is a material that transfers heat well
a) Jaką długość powinien mieć mieć bok kwadratu , aby pole tego kwadratu było równe polu prostokątu o wymiarach 3cm x 4cm ? Wynik podaj z dokładnością do 1mm.
b) Jaką długość ma krawędź sześcianu , którego ma objętość jest równa objętości prostopadłościanu o wymiarach 2cm x 4cm x 5 cm ?Wynik podaj z dokładnością do 1mm.
What do you call identical parakeets on the edge of the roof
This question is a kind of pet riddle. But first to understand the answer, you should what are parakeets are. Parakeets are a kind of parrot that has generally has a long tail. The answer for the riddle is parapets. Parapets are the edge of the roof and also parakeets are also pets.
This question is a kind of pet riddle. But first, to understand the answer, you should what are parakeets are. Parakeets are a kind of parrot that has generally had a long tail. The answer for the riddle is parapets. Parapets are the edge of the roof and also parakeets are also pets.
Explanation:
A parapet could be a barrier that is an extension of the wall at the sting of a roof, terrace, balcony, paseo or different structure. The word comes ultimately from the Italian parapet to (para re "to cover/defend" and petto "breast"). The German equivalent Brustwehr has an equivalent which means.
What are the two factors that affect the frictional force between two surfaces?
Answer:
The amount of force and the angle between them.
Explanation:
What contribution is a modification to Thomson plum pudding model
A slingshot shoots a marble. It travels at an average speed of 15 m/s for 12 seconds before hitting it's target. How far does it travel?