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Related Questions
Which material is the most dense?
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There is an old story about a king and his crown. The king hired a goldsmith to make him a crown a pure gold. After the king received the crown, he started to worry that the goldsmith might have cheated him. He thought maybe the goldsmith didn't use pure gold, maybe he used a mix of metals to save money. The king asked a man named Archimedes to figure out if the crown was pure gold or not. Archimedes reasoned that the density of a lump of gold and a crown of pure gold would be the same. How could he prove if that crown was pure gold without melting or otherwise destroying the crown?
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Number 10 plz :D tysm!!!
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Answer:
B) Two tectonic plates pullaway from each other, forming a rift valley or midocean ridge.
Hope this helps u! ;)
-Ari.
PLEASE HELP ME
Tyler found his iguana playing with a soccer ball in the basement that contained 400kPa of pressure, held 3L and was at 300K. Devin took the ball in the garage where the pressure in the ball became 350kPa and the temperature was 250K. How much space did the ball take up? Question 14 options:
1. 2.9 L
2. 2.0 L
3. 2.8 L
4. 2.5 L
5. 2.7 L
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The ball took up 2,9L
To solve this problem, we should apply the ideal gas law and clear for n (the number of moles), as this value doesn't change when Devin takes the ball to the garage:
[tex]n= \frac{P1*V1}{RT1}=\frac{P2*V2}{RT2}[/tex]
Now, we should clear this equation to find V2, as this is the value we are looking for:
[tex]V2= \frac{P1*V1*T2}{P2*T1}= \frac{400kPa*3L*250K}{350kPa*300K}=2,857L[/tex]≈2,9L
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You observe heat, light, and sound released by a chemical reaction. This reaction is (2 points)
absorbing energy
consuming energy
exothermic
endothermic
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Which are the products in this chemical reaction? 2C4H10 + 13O2 8CO2 + 10H2O
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In the chemical reaction; 2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O. The products of the reaction are; 8 molecules of carbon dioxide (CO₂), and 10 molecules of water (H₂O)
This chemical equation represents the combustion of butane (C₄H₁₀) with oxygen (O₂). Combustion is a type of chemical reaction where a substance reacts rapidly with oxygen, releasing energy in the form of heat and light. In the given equation, two molecules of butane (C₄H₁₀) react with 13 molecules of oxygen (O₂).
Breaking down the reaction:
On the left side (reactants):
2 molecules of butane (C₄H₁₀): C₄H₁₀ +C₄H₁₀
13 molecules of oxygen (O₂): 13O₂
On the right side (products):
8 molecules of carbon dioxide (CO₂): 8CO₂
10 molecules of water (H₂O): 10H₂O
The balanced chemical equation indicates that for every 2 molecules of butane reacting, it requires 13 molecules of oxygen. After the reaction, 8 molecules of carbon dioxide and 10 molecules of water are produced as products.
This balanced equation demonstrates the conservation of mass. The total number of atoms of each element on the left side of the arrow (reactants) is equal to the total number of atoms of each element on the right side of the arrow (products). This is a fundamental principle in chemical reactions, ensuring that matter is neither created nor destroyed, only rearranged to form new substances.
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Which of the following occurs when an electron moves from a higher energy shell to a lower energy shell?
A. A neutron is always lost.
B. A proton is always gained.
C. Energy is released in the form of radiation.
D. The electron must be transferred to another atom.
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Answer: Option (C) is the correct answer.
Explanation:
When energy is supplied to an electron then on absorption of energy it tends to move from a lower energy level to higher energy level.
And, when this electron moves from higher energy level to lower energy level then excess of energy absorbed by it is released in the form of visible light or radiation.
This emission of energy is also responsible for imparting color to a compound.
Thus, we can conclude that energy is released in the form of radiation occurs when an electron moves from a higher energy shell to a lower energy shell.
is H2CO3 and Na2CO3 a buffer
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Answer:
No
Explanation:
A buffer solution is a combination of a weak acid and its conjugate base; for instance, carbonic acid (H2CO3) and sodium bicarbonate (NaHCO3), not sodium carbonate (Na2CO3). Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications.
A person who is interested in the brain and its functions might pursue a career in
A) endocrinology
B) gene therapy
C) neuroscience
D) sports medicine
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Answer:
Explanat C nutro sience srry i f i did not help
Can you please answer 11-20 thanks
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Pressure tells how much force is on an area.
12. The pressure exerted by Earth's atmosphere is air pressure.
13. The density of an object is its mass divided by its volume.
14. A(An) hydraulic device uses fluid to transmit a force.
15. The flow of smoke up a chimney is partly explained by Bernoulli's principle.
True or False questions
16. Water pressure increases as depth increases. True
17. Air pressure is measured using a barometer. True
18. The buoyant force acts in a downward direction. False
19. The buoyant force on an object is equal to the weight of the fluid the object displaces. True
20. Archimedes' principle explains how an airplane flies. False
What is the gravityThe buoyant force is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. It is caused by the difference in pressure between the top and bottom of the object. The pressure at the bottom of the object is greater than the pressure at the top because there is more fluid above it pushing down.
The magnitude of the buoyant force is equal to the weight of the fluid displaced by the object. This is known as Archimedes' principle. For example, if you place a ball in a cup of water, the buoyant force on the ball will be equal to the weight of the water that the ball displaces.
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see text below
Completion
Read each word in the box. In each sentence below, fill in the correct word or words. Not all words will be used.
mass
Bernoulli's principle
force
air pressure
gravity
hydraulic device
11. Pressure tells how much ---is on an area.
12. The pressure exerted by Earth's atmosphere is -----------
13. The density of an object is its ------------divided by its volume.
14. A(An) ----------uses fluid to transmit a force.
15. The flow of smoke up a chimney is partly explained by -----
True or False
If a statement is true, write true. If it is false, write false.
16. Water pressure increases as depth increases.
17. Air pressure is measured using a barometer. 18. The buoyant force acts in a downward direction.
19. The buoyant force on an object is equal to the weight of the fluid the object displaces.
20. Archimedes' principle explains how an airplane flies.
If the bright lines in the spectrum of oxygen are matched by lines in the dark-line spectrum of the sun, what does that indicate? A. The gaseous outside of the sun contains oxygen. B. There is no oxygen in the sun. C. The sun burns its fuel using oxygen. D. The spectrum can be detected only by a radio telescope.
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Answer:
the answer is A.
Explanation:
If the bright lines in the spectrum of oxygen are matched by lines in the dark-line spectrum of the sun, this indicate that the gaseous outside of the sun contains oxygen.
What is spectrum?In physics, the term "spectrum" refers to the variation in light intensity with frequency or wavelength. A spectroscope is a device created for visual spectral observation, while a spectrograph is a device that captures or maps spectra.
Since all wavelengths are present, the spectrum of luminous solids is considered to be continuous. In contrast, the spectrum of burning gases is known as a line spectrum since it only emits a small number of wavelengths. If the bright lines in the spectrum of oxygen are matched by lines in the dark-line spectrum of the sun, this indicate that the gaseous outside of the sun contains oxygen.
Therefore, the correct option is option A.
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Please I need help with questions 1-4 and it’s very hard and I’m struggling with it and can you check if I did the punnet square label good or not and if I didn’t do it good then help me fix it and read the directions carefully
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that the one i did to
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What is the difference between a simile and a metaphor?
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In what way is the planet Uranus unique
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1.)Unlike the other planets of the solar system, Uranus is tilted so far that it essentially orbits the sun on its side, with the axis of its spin nearly pointing at the star. This unusual orientation might be due to a collision with a planet-size body, or several small bodies, soon after it was formed
How much heat is lost when 350g of iron cools from 54.1 to 22.4oC? (The specific heat of iron is 0.450 J/g oC)
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Mass of iron = 350 g, specific heat capacity = 0.450 J/gC while;
change in temperature = 54.1 - 22.4 = 31.7
Hence; heat = 350 × 0.450 × 31.7
= 4992.75 J or 4.993 kJ
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For the balanced equation shown below, how many moles of O2 will react with 0.3020 moles of CO2?
2C2 H5 OH + 6O2 → 4CO2 + 6H2O
Question options:
0.151 moles O2
0.201 moles O2
0.302 moles O2
0.453 moles O2
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Set up a proportion: the answer comes out of the balanced equation.
6 mols O2:4 mols CO2:: x : 0.3020 mols CO2
6/4 = x / 0.3020 You could reduce this, but why bother. Calculators to the rescue.
Cross multiply
0.3020 *6 = 4*x
1.812 = 4x Divide by 4
1.812/4 = x
x = 0.4530 to 4 places.
D <<<< answer
Which of the following is true about an atom of iron and an atom of copper?
1 They have different masses.
2 Both have the same properties.
3 They have an equal number of protons.
4 Both have different types of sub-atomic particles.
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OPTION 1 AND 4.
Iron and copper atoms differ in their atomic mass and the number of their sub-atomic particles. They do not exhibit the same properties or share an equal number of protons.
Explanation:The question is asking about the key differences between an atom of iron and an atom of copper. Here are the correct observations:
They have different masses. The atomic mass of iron is 55.845 while the atomic mass of copper is 63.546.Both have different types of sub-atomic particles. Although iron and copper have the same types of sub-atomic particles (protons, neutrons, and electrons), the number of these particles in each atom is different. Iron has 26 protons while copper has 29 protons.However, it's incorrect to say that both atoms have the same properties or have an equal number of protons as each atom's properties and number of protons are dictated by its atomic number and arrangement of electrons.
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helpppp me plzz....
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2.a) warm air is lighter than cold air so thats why it's warmer upstairs than downstairs
3.d) Conduction is the process by which heat energy is transmitted through contact with neighboring molecules
4.d) the lamp radiates heat throughout the plants
Organisms can pass on genetic information through asexual or sexualreproduction.Which if the following statements best describes how asexual reproduction differs sexual reproduction
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Asexual reproduction involves one parent and produces genetically identical offspring, while sexual reproduction involves the combination of genetic material from two parents to produce genetically varied offspring. Asexual reproduction allows many offspring to be produced quickly, whereas sexual reproduction provides genetic diversity, potentially increasing offspring survival rates in changing environments.
Explanation:The main difference between asexual and sexual reproduction lies in the biological processes and resulting offspring. Asexual reproduction involves one parent and produces offspring that are genetically identical to that parent, while in sexual reproduction, genetic material from two parents combine to create offspring with genetic variation. Asexual reproduction methods include fission, budding, and fragmentation, making it possible for a single individual to quickly produce a large quantity of offspring that are ideally adapted to a stable environment.
In contrast, sexual reproduction creates a greater genetic diversity in offspring, providing them a higher chance of survival in changing or unpredictable environments. It typically includes processes such as internal or external fertilization of the female's eggs by the male's sperm. However, species that reproduce sexually need to maintain two types of individuals, males and females, which could be a disadvantage compared to asexual reproduction, especially when considered in terms of population growth and colonization of new habitats.
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what characteristic of carbon atoms helps to explain the wide variety of organic compounds ???
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A (n) blank is a movement or trembling of the ground that is caused by a sudden release of energy when rocks move along a fault. Plz helpppp
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Which BEST explains why people see carrots as orange?
A) The carrots reflect only orange light.
B) The carrots absorb orange light from the Sun.
C) Orange light changes direction when it hits the carrots.
D) The carrots are opaque and do not allow orange light through.
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Answer:
Option A
Explanation:
Carrots are composed by a large proportion of carotenoids. These are pigments that can absorb most of the light spectrum, peaking between 450-550nm, and falling at the yellow-orange range which is around 600nm and above. Therefore, the yellow-orange light that is not absorbed reflects towards our eyes.
How can we find the volume of this fish tank? Please I needed but Good
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Answer:
The correct answer is find the number of 1 foot cubes that fill the fish tanks.
Explanation:
Volume is defined as amount of space occupied by an object.
Number of 1 foot cubes lying on the length of fish tank ,l= 5 feet
Number of 1 foot cubes lying on the width of fish tank,w = 3 feet
Number of 1 foot cubes lying on the height of fish tank ,h= 3 feet
Volume of the cuboid fish tank will be :
The volume of fish tanks id 45 cubic feet.
Explanation:
To find the fish tank's volume, multiply its length, width, and height, represented by: Volume = Length × Width × Height, which is 5 multiplied by 3 multiplied by 3, which yields 45 cubic feet.
To determine the volume of the fish tank, envision it as a rectangular prism and determine the dimensions based on the arrangement of 1-foot cubes. The length, width, and height are given as 5 cubes, 3 cubes, and 3 cubes, respectively. By multiplying these dimensions, you calculate the total volume of the tank.
Each dimension represents the number of cubes stacked along that axis, illustrating how they fill the three-dimensional space. This multiplication reflects the total number of cubic feet the tank can contain. Once multiplied, the result represents the volume of the fish tank, providing insight into its capacity in cubic feet.
Which motion is the best model to use to illustrate passive transport?
Going over a hill
Going around a carousel
Going down a slide
Going through a tunnel
Answers
Answer: going down a slide.
Justification:
The term passive transport is used to the describe the movement of particles in circumsantaces that do not require the use of energy.
It is mainly used for some physical process related to particles like diffusion or osmosis.
For illustrative purposes. it is compared with the movment of an object down a hill (or a slide as in the case of this question) as the object will go from high to low without requiring the use of energy.
Which statement correctly describes what happens when water turns to steam in terms of energy?
A. the water absorbs energy which causes chemical bonds to break, changing water to steam.
B. the water releases energy which causes chimical bonds to break, changing water to steam.
C. the water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a gas. D. the water absorbs energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from a liquid to a gas.
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What is The temperature at which a substance changes from a liquid to a gas
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In swimming, you apply a force to the water to move yourself forward. The greater the water pressure, the faster you can swim. This can best be explained by one of newton's laws of motion that states A) for every force on an object that object exerts an equal and opposite force back. B) a body in motion will continue in motion unless acted upon by an outside force. C) the net force equals the mass times the acceleration of and object. D) energy cannot be created or destroyed on changed forms.
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In swimming, you apply a force to the water to move yourself forward. This can best be explained by one of newton's laws of motion that states for every force on an object that object exerts an equal and opposite force back. Thus option A is correct.
What is Newton's law of motion?Newtons law of motion is three fundamental laws of classical mechanics that describe the relationship between an object's motion and the forces acting on it.
The three basic laws can be expressed as
Unless acted upon by a force, a body remains at rest or in motion at a constant speed in a straight line.When a body is acted upon by a force, its momentum's time rate of change equals the force.When two bodies exert forces on each other, the magnitude of the forces is the same but the directions are opposite.Thus, in swimming, you apply a force to the water to move yourself forward. This can best be explained by one of newton's laws of motion that states for every force on an object that object exerts an equal and opposite force back. Thus option A is correct.
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Can you please answer 12 and 13 thanks
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13. When neither hemisphere is tilted toward nor away form the sun, it is called equinox. At this time, daylight and night time is as long as each other, or they are both 12 hours long in both hemisphere.
Derrick just got home from playing soccer on a muddy field. He is curious how different brands of laundry detergent compare in removing mud from clothes, so he sets up an experiment. In one laundry load, he puts his muddy socks with Brand A detergent. In the next load, he puts his muddy jersey with Brand B detergent. In the final load, he puts his muddy shorts with Brand C detergent. Afterward, he noticed that the jersey came out the cleanest. He concludes that Brand B is the best detergent for removing mud from clothes. Is his conclusion valid? A. No; Derrick was biased toward Brand B. B. No; there were too many variables in the experiment. C. No; there were too many controls in the experiment. D. Yes; the experiment was set up correctly.
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Who can use scientific inquiry and what does it involve?
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Answer:
Sample Response: Scientific inquiry is the process used to ask and answer questions about the natural world. It can be used by anyone and involves asking a question, performing an investigation, collecting evidence, providing explanations, and communicating the results.
Explanation:
sample from Edge