When a liquid loses sufficient energy, it changes its state from liquid to solid, a process called freezing. The particles in the liquid slow down and form fixed positions, becoming a solid. The temperature remains constant during this phase change until the entire substance has transformed.
Explanation:When a liquid releases enough energy, it undergoes a phase transition or change of state from liquid to solid, typically known as freezing. This process occurs as the particles in the liquid lose energy and slow down, enabling them to form fixed positions and turn into a solid substance. This is quite evident in water; when it cools sufficiently and loses enough thermal energy, it becomes ice.
In phase transitions, it's important to note that the temperature of a substance remains constant until the phase change is complete. For instance, the temperature of water stays at 0 degrees Celsius (32 degrees Fahrenheit) when freezing, despite losing energy, until all the water has turned into ice.
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Neon is a gas made up of one type of atom. Which term best describes neon?
A) molecule
B) element
C) compound
D)mixture
The correct term to describe neon is B) element.
Neon is a gas that's made up of one type of atom, making it an element. This noble gas is found in the air and is used in neon signs, where it emits a red-orange glow when electrified. Each neon atom has a total of 10 electrons, with 8 in the outer shell, and exists as a monatomic gas in its physical state rather than as a molecule, which generally comprises two or more atoms bonded together. Thus, the term that best describes neon is element.
What is the amount of matter that makes up something
Mass is the term that refers to the amount of matter an object has. It is a constant property of an object and doesn't change with location. It can be measured using units like grams or kilograms.
Explanation:The amount of matter that makes up something is known as its mass. It displays the volume of matter that an object holds. This doesn't change, regardless of where the object is located. For example, whether a particular rock is on Earth or on the Moon, its mass - the amount of matter it is composed of - remains consistent. To measure mass, we generally use units such as grams (g) or kilograms (kg) in the metric system, or ounces (oz) and pounds (lb) in the imperial system.
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What is the difference between a cast fossil and a mold fossil?
A mold fossil is created when an object is deposited in soft mud and is later removed by physical means or decomposition. In contrast, a cast fossil is created when a mold fossil fills with sediment.
What are fossil?Fossil are defined as the well-preserved remnants of plants and animals whose carcasses were buried beneath ancient seas, lakes, and rivers in sediments like sand and muck.
Mold fossil is defined as a fossil is created when silt covers the inside or outside of a dead organism and the organism's remains are buried, leaving only the rock's structure and texture to serve as a reminder of what was once within.
Thus, a mold fossil is created when an object is deposited in soft mud and is later removed by physical means or decomposition. In contrast, a cast fossil is created when a mold fossil fills with sediment.
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which would conduct electricity well in solution: a strong electrolyte, a weak electrolyte, both types of electrolytes, or neither type of electrolyte?
Strong electrolytes conduct electricity well, weak electrolytes conduct to a lesser extent, and non-electrolytes do not conduct at all.
Strong electrolytes conduct electricity well in solution as they contain a high number of ions, leading to high conductivity. On the other hand, weak electrolytes conduct electricity to a lesser extent due to fewer ions present. Non-electrolytes do not conduct electricity in solution at all.
How are fireworks made ?
Final answer:
Fireworks are made through a chemical reaction triggered by activation energy, provided by lighting the fuse, leading to a colorful display of atoms emitting energy. The discovery of gunpowder was a critical step in the ability to create such displays, involving the precise mix of chemicals for different effects.
Explanation:
How Fireworks Are Made:
Fireworks, a spectacle of light and sound, celebrate joyous occasions through the controlled use of explosive materials. Their brilliant, colored lights are the result of atoms emitting energy when their electrons transition between energy levels. Activation energy is essential for the chemicals inside a firework to react, which happens when the fuse is ignited, providing heat to the system.
Upon reaching the correct altitude, a fireworks rocket explodes, releasing thousands of glowing fragments in a display of conservation of momentum and center of mass. Each fragment takes part in the beautiful, cascading display, which is carefully timed and choreographed for maximum effect.
The art of creating fireworks has a long history, with the discovery of gunpowder being a fundamental step. This mixture of saltpetre, sulphur, and charcoal, when ignited, produces the explosive force that propels fireworks into the sky. Once airborne, precise compositions of various chemicals within the firework determine the colors and patterns observed.
Min tapes a piece of string to each of two ping-pong balls. He hangs the balls so that they are close to one another but do not touch. Later, he finds that they have pulled together. They are now touching. What could explain why two balls are now touching?
A) they have both lost their charges
B) they have gained opposite charges
C) they have both gained a positive charge
D) they have both gained a negative charge
Which cell structures are correctly paired with their functions?
A.
The mitochondria produce enzymes, and ribosomes transport them.
B.
The ribosomes make proteins, and the nucleus stores genetic information.
C.
The cell membrane makes enzymes, and cytoplasm transports them.
D.
The vacuole stores genetic information, and chloroplasts make proteins.
The ribosomes make proteins, and the nucleus stores genetic information. Hence option B is correct.
What are ribosomes?Ribosomes are defined as a protein- and RNA-based intercellular structure that serves as the cell's location for protein synthesis. Protein synthesis is always carried out by the ribosome, which converts the genetic code produced in mRNA into an amino acid sequence.
Protein synthesis takes place at the ribosome, whereas respiration is carried out by the mitochondria, water and other nutrients are stored in the vacuole, and the cell is controlled by the nucleus. A ribosome is a sophisticated macromolecular component of the organism that aids in translation. All live cells must do this vital action in order to produce proteins and a variety of other biological components.
Thus, the ribosomes make proteins, and the nucleus stores genetic information. Hence option B is correct.
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Identify at least one property of water that differs from the properties of the elements that form it.
Answer:
h20
Explanation:
The properties of water, like its polarity, capacity to form hydrogen bonds, and its high heat capacity significantly differ from the properties of its constituent elements - hydrogen and oxygen. These properties allow water to possess characteristics crucial to life such as acting as a solvent and having thermal stability. The differences demonstrate how atoms can gain new properties when they combine to form compounds.
Explanation:Water, a compound composed of hydrogen and oxygen (H₂O), displays properties that differ significantly from those of its constituent elements. One major property of water is its polarity, which allows for the formation of hydrogen bonds between adjacent water molecules, contributing to unique characteristics vital for life.
For instance, water's hydrogen bonds give it a high heat capacity and heat of vaporization, resulting in temperature stability which is important for maintaining homeostasis in living organisms. The polarity of water and its hydrogen bond formation allows it to act as an excellent solvent for other polar molecules and ions. Moreover, the hydrogen bonding makes solid water or ice less dense than liquid water, a phenomenon not commonly observed in other substances. This is due to the molecules forming a crystalline structure when frozen, that is maintained by hydrogen bonding.
These properties of the water molecule such as hydrogen bonding, high heat capacity, polarity and being an excellent solvent are drastically different from the properties of individual hydrogen and oxygen atoms. Therefore, it illustrates how composition and bonding change the properties of elements when they form compounds.
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which is not found in dry air
Describe the difference between nuclear energy and light energy
Answer:Nuclear energy is the stored potential energy in the nucleus of an atom. ... Compared to this, light energy is a form of electromagnetic radiation such that it is composed of photons, which are small packets of light energy. Each photon has a characteristic wavelength, frequency.
Explanation:
Jose and Gina are studying balanced and unbalanced forces and are challenged to test their theories. Predict the result when Jose applies 6 Newtons of forces to one side of a box and Gina applies 6 Newtons of force to the other side of the box.
A)
The box does not move.
B)
The box moves toward Gina.
C)
The box moves toward Jose.
D)
The force crumples the box.
Answer : The correct option is, (A) The box does not move.
Explanation :
Force : It is defined as the force can be a push or a pull.
Balanced force : When the two forces are equal in magnitude and in opposite direction. These forces are balance to each other. In this force, the object does not move.
Unbalanced force : When the two forces are not equal in magnitude and direction. These forces does not balance to each other. In this force, the object will move on that side where the force will be applied more.
There are three cases :
Case 1 : [tex]F_L=F_R[/tex]
That means, when the force applied from left side are equal to the force applied from the right side then they balance to each other and object will not move.
Case 2 : [tex]F_L>F_R[/tex]
That means, when the force applied from left side are more than the force applied from the right side then the object will move towards right side.
Case 3 : [tex]F_L<F_R[/tex]
That means, when the force applied from left side are less than the force applied from the right side then the object will move towards left side.
According to question, the applied forces are equal in magnitude and in opposite direction. So, the box will not move.
Therefore, the correct answer is, A
What acceleration does the force of earths gravity produce?
(a) 9.8 m/s/s
(b) It varies depending on how long it has been falling.
(c) Gravity does not produce an acceleration.
(d) It changes direction every 9.8 meters.
Answer: A
Explanation: Acceleration due to gravity, denoted by (g), is the acceleration gained by an object because of gravitational force action on the object. It has a standard value 9.8m/s/s.
Filtration is an example of a process that can be used to separate __________, but not __________.
Answer:
This question appears incomplete
Explanation:
Filtration is a physical process that is used to separate a mixture of solid solute from a liquid solvent. It requires the use of a filter paper which allows the passage of the liquid component of the mixture while the solid solute remains on the filter paper.
The liquid solvent that passes through the filter paper is called filtrate while the solid solute that remains on the filter paper is called filtride.
Filtration is can only be used to separate mixtures but not compounds.
A mixture is substance containing two or more constituents that are physically combined while a compound is a substance containing two or more atoms that chemically combined.
A common example of filtration process is the separation of a mixture of water and stone. This mixture is poured over a filter paper, the water passes through the filter paper while the stone remains on a filter paper
In the reaction __H2 + O2 → 2H2O, what coefficient should be placed in front of H2 to balance the reaction?
1
2
3
no coefficient is needed
Answer:
the awnser is 2
Explanation:
What happens to ice as it warms up
Why are pickles stored in glass jars not metal jars ?
What's the mass of 30 ML of isopropanol
Plz help I'm so confused
Which is the least dense?
copper
mercury
water
wood
D. WOOD IS THE LEAST DENSE .
HOW CAN WE IDENTIFY ??
The object that floats on the water surface easily that is least dense. Density of objects in g/cm³Copper = 8.96
Mercury = 5.43
Water = 1
Wood = 0-1
Hence wood is the least dense object .
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in times of hot dry weather some cities ban the use of garden sprinklers why do you think there is such a rule
Answer:
To restrict the amount of water being utilized from a limited supply.
Explanation:
A sprinkler or a hosepipe ban gets imposed in certain cities during hot weather conditions in order to conserve the declining levels of drinking water, that is, stored in the reservoirs at the time of drought. Once the rainy season comes back the ban gets lifted as the reservoirs get filled once again, and it is more essential to provide water to the public, as the grass can always grow again.
Which definition is correct?
A. A physical change creates a new substance because bonds are broken or formed
B. A chemical change occurs when the substance remains the same but the shape, or other physical characteristics change
C. A physical change can happen without changing any characteristics of the substance
D. A chemical change produces a new substance by breaking and forming new bonds
Why do liquids and gases take the shape of their containers while solids do not?
Describe two types of mechanical weathering
Final answer:
Mechanical weathering involves the breakdown of rocks into smaller pieces without altering their chemical composition. Abrasion and frost wedging are two types, with abrasion caused by rocks and sediments grinding against each other, and frost wedging resulting from the expansion of freezing water inside rock fissures.
Explanation:
Two Types of Mechanical Weathering
Mechanical weathering is the physical breakdown of rocks into smaller fragments without changing the chemical composition of the minerals within the rock. Abrasion and frost wedging are two common types of mechanical weathering.
Abrasion
Abrasion occurs when rocks and sediment grind against each other, powered by natural forces such as gravity, moving water, wind, and glaciers. This friction and collision strip away the outer layers of rocks, making them smoother and rounder over time. For example, pebbles in a stream are often smooth because of the continuous abrasion they undergo.
Frost Wedging
Another type of mechanical weathering, frost wedging, happens when water seeps into cracks in rocks and freezes. As water freezes, it expands, exerting pressure on the surrounding rock, causing it to crack and eventually break apart. This process is particularly effective in climates with frequent temperature fluctuations above and below freezing, contributing to the breakup of boulders and the formation of talus slopes.
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How much force is needed to accelerate a 80 kg rider and her 250 kg motorcycle at 4 m/s2?
A. 320 N
B. 1000 N
C. 1030 N
D. 1320 N
1320 N Is Correct Hope this helps
A physical property of halite (table salt) is its _____. A. acidity B. basicity C. high melting point D. chemical composition
Answer: C. high melting point
Explanation:
Physical property is defined as the property of a substance which becomes evident during physical changes. Example: melting point
Chemical property is defined as the property of a substance which becomes evident during chemical changes. Example: Reactivity with other substances , acidity, basicity , chemical composition
Acidity is the number of [tex]OH^-[/tex] ions a substance releases on dissolving in water.
Basicity is the number of [tex]H^+[/tex] ions a substance releases on dissolving in water.
Thus high melting point is the physical property of halite.
true
or false most meteoroids burn up the ionosphere
The claim that most meteoroids burn up in the ionosphere is false.
The statement that most meteoroids burn up in the ionosphere is false. In reality, meteoroids enter the Earth's atmosphere and burn up in the mesosphere, not the ionosphere. The ionosphere is known for its high ion density, which affects radio wave propagation, but it is not where meteoroids typically disintegrate. The mesosphere, positioned above the ionosphere, is where meteoroids experience significant friction with atmospheric gases leading to their high temperatures and eventual vaporization. Most of the large meteoroids become meteors and burn up completely before reaching Earth's surface. Occasionally, some may survive the journey through the atmosphere and hit the surface, becoming meteorites.
It is commonly misunderstood that meteorites, upon landing, are hot and cause fires. However, meteorites are cold in space, and despite their fiery descent, remain largely cold inside, sometimes even developing a frost coating. This dispels the myth that a freshly fallen meteorite could start a fire. Thus, the spectacle of a bright fireball in the sky rarely ends with a meteorite hitting the ground.
A 420-N force acts on a 400-N object, and the force is from the north. In which direction will the object move?
A) SOUTH
B)NOURTH
C)FORWARD
D)BACKWARD
Answer: The object will move in the South direction.
Explanation: We are given an object of 400 N and force acting on it is 420 N from the north direction, it means the force is acting towards south.
The object will move in the direction of the net force, which is south direction.
Hence, the correct option is A.
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Unstable potassium oxide reacts with water vapor in the air to produce potassium hydroxide:
K2O + H2O → KOH
What, if anything, should be done to balance this chemical equation?
A. Nothing. It is balanced.
B. Put a "2" in front of the KOH.
C. Put a "4" in front of the KOH.
D. Put ".5" in front of both K2O and H2O.
Chemical equations are symbolic depictions of chemical reactions where the reactants and products are stated in terms of their respective chemical formulae.
The correct answer is B. Put a "2" in front of the KOH.
What is the chemical equation for potassium oxide + water ---> potassium hydroxide?K2O + H2O → KOH
Water and potassium oxide combine to form potassium hydroxide.Ionic compounds include potassium oxide. While oxygen has an O2− charge, potassium has a K + charge. The formula K 2 O is created by adding two potassium ions to balance out one oxide ion.An ionic compound is potassium hydroxide. Hydroxide has a charge of OH and potassium has a charge of K +. The formula KOH is created by adding one potassium ion to one hydroxide ion.K2O + H2O → KOH
We add a coefficient of 2 in front of the potassium hydroxide to make the equation equal.K2O + H2O → 2KOH.
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How do you balance the equation Hydrogen plus Oxygen yield water?
glucose is an important sugar in many biochemical reactions. What is the molarity of a solution that contains 500 grams of glucose (molecular weight= 180.16 g/mol) in 0.72 liters of solution?
according to the current model of the atom, the atoms are most stable when they have filled outer energy levels. How do the properties of noble gases support this model??
Noble gases, including helium, neon, and argon, exhibit evidence supporting the atomic model's claim of stability when outer energy shells are filled. Their unreactive nature and stable configurations are due to having a full valence shell, providing concrete evidence within this atomic model.
Explanation:According to the current model of the atom, atoms are most stable when their outer energy levels, or valence shells, are filled. This aligns perfectly with the properties exhibited by noble gases. Noble gases, which include helium, neon, and argon, to name a few, all have a full outer valence shell. This configuration makes them extremely stable, as the full valence shell of each noble gas atom results in a large ionization energy, denoting their resistance to giving up an electron. In addition, the introduction of an extra electron would place it in a higher energy level that is loosely bound, which is undesirable.
The properties of noble gases provide evidence for the atomic model's claim of stability. Their lack of reactivity is tied directly to their filled outer energy shells, demonstrating that atoms with a completed outer shell are most stable. This evidence supports the principle of the atomic model that by filling each energy level from the shell closest to the nucleus to the outermost shell, atoms achieve their most stable state. This model also explains why other elements engage in bond formation with other atoms to achieve full electron capacity and stability.
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