Igneous rocks that form on Earth's surface when lava cools are known as extrusive or volcanic igneous rocks. They are fine-grained, leading to a duller appearance due to their rapid cooling.
Explanation:Igneous rocks that form when lava cools on Earth's surface are called extrusive igneous rocks. These rocks are also known as volcanic igneous rocks and are characterized by their fine-grained texture because they cool quickly, which doesn't allow for large crystals to form. The quick cooling on the Earth's surface leads to the fine-grained structure that causes these rocks to look dull and to sparkle less as compared to their intrusive counterparts. Basalt is one of the most common types of extrusive igneous rocks, often formed from basaltic lava in volcanic eruptions.
Final answer:
Extrusive igneous rocks, also known as volcanic igneous rocks, are formed when lava cools on Earth's surface. These rocks have small crystals and a dull appearance.
Explanation:
When lava cools on Earth's surface, it forms extrusive igneous rocks. These rocks are also known as volcanic igneous rocks. Extrusive igneous rocks cool quickly on the surface and have very small crystals, which give them a dull appearance.
for a given input force, a ramp increases which of the following? A)height B)output force C)output work D) efficiency
How can you use the periodic table to find the number of neutrons in one atom of an element?
The number of neutrons is equal to the number of electrons.
The number of neutrons is equal to the atomic number of the element.
The number of neutrons is equal to the atomic weight of the element.
The number of neutrons is equal to the atomic weight minus the number of protons.
To find the number of neutrons in an atom of an element using the periodic table, subtract the atomic number from the atomic weight.
Explanation:To find the number of neutrons in an atom of an element using the periodic table, you need to look at the element's atomic number and atomic weight. The atomic number represents the number of protons in the nucleus of an atom. The atomic weight represents the average mass of all the isotopes of an element, taking into account the abundance of each isotope.
To find the number of neutrons, you subtract the atomic number from the atomic weight. This is because the atomic weight includes both protons and neutrons, so subtracting the atomic number (which represents the number of protons) gives you the number of neutrons. For example, for helium (atomic number 2, atomic weight 4.0026), there are 2 neutrons (4.0026 - 2 = 2).
Therefore, the correct option is: The number of neutrons is equal to the atomic weight minus the number of protons.
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What is the effect of acid rain on the infrastructure of buildings and bridges ?
if the mass of one or two spheres increases, how does it affect the gravity between the two spheres?
The gravitational force between two objects depends on the mass and distance between them. If the mass of one or two spheres in contact is increased, then the gravitational pull between them increases.
What is gravitational force?Gravitational force is a kind of force by which an object attracts other objects towards its centre of mass. The force exerted by the object and the force experienced by an object depends on the mass of them and the distance between them.
The mass of two objects M1 and M2 and the distance is taken as r, then the gravitational pull between these two objects are written as :
[tex]F = G \frac{M_{1}M_{2}}{r^{2}}[/tex]
Where G is the universal gravitation constant.
According to this equation, gravitational force F is directly proportional to the mass of the objects and inversely proportional to the square of the distance between them. Therefore, as the mass increases gravity also increases.
Hence, if the mass of one or two spheres increases, gravity between them increases.
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what might happen if the earth exceeds its carrying capacity
Exceeding the Earth's carrying capacity can have negative consequences, such as a population crash and collapse of ecosystems.
Explanation:When the Earth exceeds its carrying capacity, it means that the resources available are being used up faster than they can replenish. This can lead to several negative consequences. For example, if the human population continues to increase, the birth and death rates could decrease, causing a population crash. Additionally, the ecological footprint of humans would increase beyond the Earth's ability to support it, potentially leading to a collapse in the population.
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Plants leaves are often preserved as?
Final answer:
Leaves are essential for photosynthesis and can vary greatly in size and shape, with adaptations like waxy cuticles to reduce water loss. Some leaves are modified into sporophylls for reproduction in certain plants. The diversity of leaf forms shows the adaptability of plants to different habitats.
Explanation:
Leaf Preservation and Function in Plants
Plants exhibit a wide array of leaf forms, ranging from large palm leaves that can stretch up to 25 meters to the tiny leaves of duckweed measuring around 3 mm. The sheer diversity of leaf adaptations is evident in their varying sizes, shapes, and structures. Leaves are primarily known as the main sites for photosynthesis, using sunlight to synthesize food thanks to the presence of chlorophyll. Apart from photosynthesis, leaves also serve as sporophylls in certain plants such as conifers and ferns, where they are structurally modified to bear sporangia for reproductive purposes.
In addition to their primary roles, leaves have characteristics like leaf hairs and a waxy cuticle that help reduce water loss through transpiration, an especially critical function in environments that pose dehydration risks. Evolution has shaped leaves to suit their habitats; for instance, needle-like leaves in coniferous species reduce water loss in cold environments, whereas cacti have spines instead of leaves to minimize water loss in arid climates.
Leaf fall is a natural process influenced by factors such as decreasing photosynthetic efficiency or oxidative damage. When older leaves are shed, it allows the plant to recycle nutrients for other processes, such as seed development and storage. The extensive versatility of leaves is a testament to the plants' ability to adapt to a wide range of ecological niches while maintaining their vital role in sustaining life on Earth.
Plants' leaves are often preserved as fossils.
Fossils are the remains or traces of ancient organisms that have been buried and subsequently mineralized over time, allowing paleobotanists to study them. Here's a detailed breakdown of how this process occurs and why these fossils are important:
Formation of Fossils: Fossils can form when a plant's leaves or other parts are trapped in sediments, such as mud or sand, which then hardens into rock over millions of years. Conditions need to be just right for the remains to be preserved; usually, this requires the rapid burial of the plant material to prevent decay.
Types of Preservation: There are different ways in which leaves can be preserved:
Carbonization: This process occurs when plant material is compressed over time, leaving behind a residue of carbon that outlines the structure of the leaf.
Imprint Fossils: These occur when the leaf leaves an impression on the surrounding sediment, capturing its shape and surface features.
Amber Preservation: In rare cases, leaves can become trapped in tree resin that hardens into amber, preserving them in astonishing detail.
does the depth of a pan affect how water freezes
Sachiko wants to measure the temperature of ice water in a beaker. The thermometer she will be using is at room temperature. After she places the thermometer in the beaker, what should she do to obtain the most accurate measurement?
To obtain an accurate temperature measurement, Sachiko needs to allow her thermometer, initially at room temperature, to reach thermal equilibrium with the ice water. She should leave the thermometer in the water until the temperature reading stabilizes, indicating that equilibrium has been reached. The scale used for measuring temperature could be Fahrenheit, Celsius, or Kelvin.
Explanation:The key to obtaining the most accurate temperature measurement when using a thermometer is to ensure that the thermometer reaches thermal equilibrium with the substance it is measuring, in this case, ice water. This means that Sachiko should leave the thermometer in the beaker of ice water long enough for it to adjust to the same temperature as the water. The concept of thermal equilibrium is based on the zeroth law of thermodynamics, which states that if two objects are in thermal equilibrium with a third object, they are in thermal equilibrium with each other.
Her thermometer is currently at room temperature, which means it's warmer than the ice water. She will need to wait until the thermometer cools down to the temperature of the ice water. The temperature reading on the thermometer should stabilize and stop changing when this equilibrium is reached.
The scale used to measure temperature typically used is Fahrenheit, Celsius or Kelvin, where the freezing point of water is at 0°C or 32°F. When measuring the temperature of ice water, it is expected that the temperature will be around these values depending on the specific scale being used.
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What gas is released during cellular respiration?
List three properties of metals that nonmetals typically do not have
Metals are distinct from nonmetals in that they are excellent electrical conductors, malleable, and have a lustrous appearance, while nonmetals are usually poor conductors, brittle when solid, and dull.
Explanation:List three properties of metals that nonmetals typically do not have:
Electrical Conductivity: Metals are excellent conductors of electricity, while nonmetals are generally poor conductors.Malleability: Metals can be hammered into thin sheets without breaking, a characteristic nonmetals usually lack, as they are brittle when solid.Lustrous Appearance: Metals tend to have a shiny surface, unlike nonmetals which are typically dull in appearance.Nonmetals contrast metals by typically being poor conductors of heat and electricity, lacking malleability, and having a dull appearance. Furthermore, they can exist in all three states of matter at room temperature, with each state displaying their unique set of properties.
Draw and label a diagram to show how you would separate each mixture?
List in order from smallest to largest the grain sizes used to describe detrital sedimentary rocks.
Answer:
The grains from smallest to the largest are as follows-
(1) Clay (Diameter, D< 0.004 mm in diameter)
(2) Silt (D= 0.004 to 0.0625 mm)
(3) Sand (D= 0.0625-2 mm)
(4) Gravel (D= 2-4 mm)
(5) Pebble (D= 4-256 mm)
(6) Cobble (D= 64-256 mm)
(7) Boulder (D> 256 mm)
These sediments are weathered from the source rock and are transported from the source area to a different place and then they are compacted and lithified as a result of which detrital (clastic) sedimentary rocks are formed. For example, sandstone, siltstone, sandstone, conglomerate and breccia.
how do you find the number of protons in an atom?
round 100.1 C to 1 significant figure
If all materials were good conductors of heat, would people and animals be able to live in cold climates? Explain your answer.
How does respiratory failure affect the body?
A. Energy is not given to the body
B. Carbon builds up in the body
C. Oxygen does not make it to the brain
D. Pathogens attack the systems of the body
Oxygen does not make it to the brain is the statement that describes how a respiratory failure affect the body.
Respiratory failure is any situation that leads to a decrease in the amount of oxygen in the blood.
When you breathe, the lungs fill with oxygen, which passes into the blood and, in this way, reaches organs that need oxygen-rich blood to function well, such as the heart and brain.
In this condition, the blood does not receive enough oxygen or has too much carbon dioxide, since it is not removed when you breathe out.If the brain, muscles or other body organs do not receive enough oxygen, you may experience a sensation of dyspnea, shortness of breath that involves a feeling of discomfort when breathing.Therefore, we can conclude that oxygen does not make it to the brain is the statement that describes how a respiratory failure affect the body.
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Consider the free body diagram of a block on a table. What is the name of the force for "table pushes up?
A)
normal force
B)
tension force
C)
static friction
D)
resistance force
im making an element superhero based on silicon....its a girl and i dont. know what superpowers to give it. help?
QUESTION 4 Which structure is found in all eukaryotic cells? large central vacuole Golgi apparatus flagella cilia
Make a list of solid mixtures in your classroom?
In the following diagram, the voltage is 1.5 volts and the resistance is 7.5 ohms. Use Ohm's law to determine the current in the circuit.
Answer: The current flowing through the circuit is 0.2 Amperes.
Explanation:
Ohm's Law is defined as the law which determines the relationship between current and potential difference across a resistor.
Mathematically,
[tex]V=IR[/tex]
where,
V = Potential difference across the resistor = 1.5 V
I = Current flowing through the circuit = ? A
R = Resistor in the circuit = [tex]7.5\Omega[/tex]
Putting values in above equation, we get:
[tex]1.5=I\times 7.5\\\\I=0.2A[/tex]
Hence, the current flowing through the circuit is 0.2 Amperes.
Consider the free-body diagram. If you want the box to move, the force applied while dragging must be greater than the
A)
normal force.
B)
tension force.
C)
friction force.
D)
force of gravity.
the anwser tot his question is c
A mixture of methane（CH4) and ethane(C2H6) of mass 13.43g is completely burned in oxygen. If the total mass of CO2 and H2O produced is 64.84g, calculate the fraction of CH4 in the mixture.
The fraction of CH₄ in the mixture is 0.362, or 36.2%.
Explanation:To calculate the fraction of CH₄ in the mixture, we need to use the balanced chemical equation for the combustion of methane:
CH₄ + 2O₂ → CO₂ + 2H₂O
From the equation, we can see that 1 mole of CH₄ produces 1 mole of CO₂ and 2 moles of H₂O.
The molar mass of CH₄ is 16 g/mol, and the molar mass of CO₂ is 44 g/mol.
We can calculate the moles of CH₄ and CO₂ produced:
Moles of CH₄ = mass / molar mass = 13.43 g / 16 g/mol = 0.839 mol
Moles of CO₂ = mass / molar mass = 64.84 g / 44 g/mol = 1.474 mol
The fraction of CH₄ in the mixture is the ratio of moles of CH₄ to the total moles of products:
Fraction of CH₄ = Moles of CH₄ / Total moles of products = 0.839 mol / (1.474 mol + 0.839 mol) = 0.362
Therefore, the fraction of CH₄ in the mixture is 0.362, or 36.2%.
Final answer:
To calculate the fraction of CH4 in the mixture, you need to determine the number of moles of CH4 and C2H6 in the mixture. From the given mass, you can calculate the moles of CO2 and H2O produced using their molar masses (CO2: 44 g/mol, H2O: 18 g/mol). The excess mass of CO2 and H2O will correspond to the mass of C2H6, while the remaining mass will be CH4. Calculate the moles of CH4 and C2H6 and divide the moles of CH4 by the total moles to find the fraction of CH4 in the mixture.
Explanation:
To calculate the fraction of CH4 in the mixture, we need to determine the number of moles of CH4 and C2H6 in the mixture. From the given mass, we can calculate the moles of CO2 and H2O produced using their molar masses (CO2: 44 g/mol, H2O: 18 g/mol). The excess mass of CO2 and H2O will correspond to the mass of C2H6, while the remaining mass will be CH4. Calculate the moles of CH4 and C2H6 and divide the moles of CH4 by the total moles to find the fraction of CH4 in the mixture.
Let's calculate:
Mass of CO2 and H2O = 64.84 g
Molar mass of CO2 = 44 g/mol, Molar mass of H2O = 18 g/mol
Moles of CO2 and H2O = (64.84 g)/(44 g/mol + 18 g/mol) = 1.12 mol
Mass of C2H6 = 1.12 mol x (30 g/mol) = 33.6 g
Mass of CH4 = Total mass of mixture - Mass of C2H6 = 13.43 g - 33.6 g = -20.17 g (negative mass is not possible)
Since we can't have a negative mass of CH4, it means that the assumption that the mixture contains both CH4 and C2H6 is incorrect. There is an error in the given information or calculation.
What is vaporization A: a gas becoming a liquid B: a liquid becoming a solid C: a gas becoming a solid D: a liquid becoming a gas
D. A liquid becoming gas
Samuel adds a teaspoon of salt to a glass of water. He notices that the salt disappears. Samuel takes a sip to discover that the water tastes salty. What kind of change has occurred? a) It’s a chemical reaction because a new substance has formed. b) It’s a physical change because the water and the salt kept their original properties. c) It’s an example of synthesis because two substances reacted to give one substance. d) It’s a chemical reaction because the water now tastes salty but originally did not
Answer: Option (b) is the correct answer.
Explanation:
When a teaspoon of salt is dissolved in water then it will completely dissociate into ions forming a homogeneous solution.
This is because particles of salt will evenly distribute into ions in the water.
This is a physical change as salt has dissociated into its ions and it has not chemically combined to the water molecules.
Hence, both salt and water will retain their chemical; properties.
Thus, we can conclude that in the given situation it’s a physical change because the water and the salt kept their original properties.
when you use a crowbar to lift a large rock, you are working against the force called
If there are many forces acting on an object how can the net force be 0
The net force on an object can be zero even with multiple forces acting on it if the sum of all forces is zero and their vector components cancel each other out, indicating a state of equilibrium.
Explanation:If there are many forces acting on an object, the net force can be zero if the vector sum of all these forces is equal to zero. This concept, described by Newton's first law of motion, means that the forces are balanced, and thus the object is in a state of equilibrium. When forces are balanced, their vector components cancel each other out in all directions, which is expressed as net Fx = 0 and net Fy = 0. For instance, when a car is moving at a constant velocity or is parked, frictional force balances out drag force or gravity, ensuring that no acceleration occurs, and hence the net force is zero.
Vince is baking a cake. He pours flour and sugar into an empty bowl. The substance in the bowl is a(n) __________. A. Mixture B. Atom C. Element
Answer: The correct answer is Option A.
Explanation:
For the given options:
Option A: MixtureMixtures are defined as the solution win which components are mixed in indefinite proportions. Every substance retain their individual chemical properties.
Option B: AtomAtoms are defined as the smallest unit which cannot be further divided.
Option C: ElementAn element is defined as the substance which is made of similar kind of atoms. All the atoms in an element have same atomic number.
According to the question:
A bowl has flour and sugar init. Both the compounds have their individual properties retained. Thus, they are forming a mixture.
Hence, the correct answer is Option A.
Which of the following statements is correct? A.the freezing and boiling temperatures of a substance are the same.
B.the freezing and melting temperatures of a substances are the same.
C.the melting and boiling temperatures of a substance are the same.
D.the melting, freezing, and boiling temperatures of a substance are the same.
The freezing and melting temperatures of a substance are the same, and this equilibrium point differs from the boiling point, which is higher.
Explanation:The correct statement among the ones provided is that the freezing and melting temperatures of a substance are the same. At the melting or freezing point, a substance is in equilibrium between the solid and liquid states. For example, for water, this equilibrium occurs at 0°C, where ice (h₂O (s)) and liquid water (h₂O (l)) coexist. The boiling temperature, however, refers to the point at which a substance rapidly converts from a liquid to a gas, and is different from the melting or freezing temperature.
For materials, the state (solid, liquid, or gas) they are in at any temperature can be predicted if we know their melting and boiling points. The existence of sharp melting and boiling points is a reflection of the different entropic and energetic states of solid, liquid, and vapor phases of a substance. Knowledge of phase changes is critical in understanding how heat transfer mechanisms work, influencing both industrial processes and everyday phenomenons.
The Answer to the Question:
The correct statement is B: the freezing and melting temperatures of a substance are the same.
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The freezing and melting temperatures of a substance are the same, exemplified by water, which melts and freezes at 0°C at standard atmospheric pressure.
Explanation:The correct statement is that B. the freezing and melting temperatures of a substance are the same. Phase changes for a substance occur at fixed temperatures, known as the boiling point and the freezing point (or melting point). Specifically, the melting point of a solid is identical to the freezing point of the liquid; at this particular temperature, the solid and liquid states are in equilibrium. An example of this is water, which transitions between solid (ice) and liquid at the equilibrium temperature of 0°C under standard atmospheric pressure.
How is plutinum made?