Answer: P waves and S waves travel through the interior of the earth. P waves are the Primary waves and S waves are the Secondary waves.
P waves can travel in both solid as well as in liquid (outer core) whereas S wave can travel only through solid. When P waves enters the outer core, it gets deviated and again enters the outer core with further deviation.
In case of S waves, once it reaches the core-mantle boundary, it reflects to the side of it, forming a shadow zone commonly known as the S wave shadow zone (103°-103°). Thus it cannot penetrate through the outer core.
If a solution is saturated, which of these is true?
More solute can be dissolved.
The concentration cannot be increased.
No more solvent can be dissolved.
More solvent can be dissolved.
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Which graph BEST represents the relationship between mass and inertia?
A
B
C
D
Answer: The correct answer is Graph B.
Explanation:
Inertia is the property of a matter due to its mass. Due to inertia, a body resits any change in its state of rest or motion. Newton's first law is based on inertia and is also known as Law of inertia.
This law states that any body will remain at rest or in motion until and unless an external force is applied on it.
Inertia is directly related to the mass of a substance. As, the mass is more, its inertia will be more and vice-versa.
The graph will represents the direct relation is Graph B. As, the mass is increasing, the inertia is also increasing
Hence, the correct answer is Graph B.
Which isotope has a relatively short half-life?
carbon-12
carbon-14
uranium-238
oxygen-16
Answer is Carbon-14
Radioactive isotopes have half lives. Half life is the time taken by the radioactive isotope to reduce its initial amount by half.
Oxygen-16 and Carbon-12 are stable isotopes of elements O and C respectively. Hence, they do not have half-lives. But Carbon-14 and Uranium-238 are radioactive isotopes. Among them Carbon-14 has relatively short half-life as about 5730 years while Uranium-238 has a long half-life as about 4.5 billion years.
A rock that is made of coarse-grained particles arranged into bands is found. What type of rock is it?
Answer:
igneous rock
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:
cuando se quema fosforos es cambio quimico ofisico
which nonmetals in the atmosphere and their combinations are essential for life on earth
Nitrogen, oxygen, carbon, and hydrogen are nonmetals essential for life on Earth. Nitrogen is necessary for protein synthesis, while oxygen is used in respiration and is part of essential molecules like water. Photosynthesis has played a key role in shaping Earth's atmosphere, which is unique in its balance of oxygen and carbon dioxide.
Explanation:The nonmetals in the atmosphere essential for life on Earth include nitrogen, oxygen, carbon, and hydrogen. These elements are found in various combinations that are vital for different processes. Nitrogen makes up 78% of the Earth's atmosphere and is crucial for the formation of proteins in living organisms, though it's not directly usable in its gaseous form N₂. Nitrogen is a component of the Earth's atmosphere and contributes to diluting oxygen, which prevents rapid combustion. The atmosphere contains oxygen, used by all living things for aerobic respiration and essential in energy production within cells.
Oxygen is also essential for processes like combustion and is involved in the creation of molecules necessary for life, such as water (H₂O) and carbon dioxide (CO₂). Carbon and hydrogen, although less abundant in the atmosphere compared to nitrogen and oxygen, are part of vital organic molecules like glucose (C₆H₁₂O₆), which is crucial for energy production in life forms. These elements are tied to life-sustaining processes, such as photosynthesis, which maintains the balance of oxygen and carbon dioxide in the atmosphere.
Life on Earth has notably altered the composition of the atmosphere compared to other planets like Venus and Mars, which have atmospheres with very high concentrations of CO₂ due to the absence of water and mechanisms like photosynthesis that recycle carbon dioxide into oxygen. Earth's unique atmosphere, rich in oxygen and with moderate levels of carbon dioxide, is the result of these life processes.
how much does a 45% solution of de-icing fluid lower freezing point of water?
Answer:
It lowers the freezing point by 30 °C
Explanation:
In the picture attached, the curve freezing point vs de-icing fluid concentration is shown. We can see that a 45% solution of de-icing fluid makes the freezing point of water -30 °C, that is, 30 °C below the pure water freezing point.
an electric clock in a classroom will not run if it not plugged into an electric outlet what does the clock get from the electric current from the outlet?
A) batteries
B)chemicals
C) energy
D)time of day
James Hutton:
developed the concept of plate tectonics
based his theories on the Neptunist view of crust formation
developed the theories of erosion and deposition
was the founder of the Plutonist theory of crust formation
Answer:
C. developed the theories of erosion and deposition
Explanation:
Hutton was a scottish geologist who believed that the origin of the earth was linked to molten magma and igneous rocks. His theory included the processes of erosion and deposition.
Therefore, the correct answer is C. developed the theories of erosion and deposition.
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?
Granite can form when magma cools within earth. Basalt can form when lava cools on earth surface. What do granite and basalt have in common?
Answer: (A) They are igneous.
Explanation:
what causes element name to change
The name of an element changes when its atomic number changes. This can occur naturally through radioactive decay or artificially through a process known as transmutation, where changes are made in the number of protons in an atom's nucleus.
Explanation:The name of an element changes when its atomic number changes. This happens either through natural radioactive decay processes or through artificial transmutation involving changes in the number of protons in an atom's nucleus. For example, Uranium-238, over time, naturally decays to Lead-206, signifying a change in the atomic number, hence a change in element name.
Similarly, in Accelerators or nuclear reactors, high-energy particles can be used to convert some elements into others. For instance, the bombardment of nitrogen atoms by alpha particles in a nuclear reaction can transform it into Carbon.
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what is the kinetic energy of a 150kg object that is moving with a speed of 15m/s ??
what occurs when gas molecules escape from the surface of a open container of liquid?
When gas molecules escape from the surface of an open container of liquid, the process is called evaporation. This involves molecules gaining enough energy to leave the liquid phase and enter the gas phase.
This occurs because some molecules in the liquid acquire enough energy to overcome the attractive forces holding them in the liquid phase. These energetic molecules then move into the gas phase, where they disperse and fill the available space in the container.
If the container were sealed, a dynamic equilibrium between evaporation and condensation would be established. During this equilibrium, the rate of molecules escaping (evaporating) would equal the rate of molecules returning to the liquid phase (condensing).
Steps involved in evaporation:
Individual molecules in the liquid gain sufficient energy from heat.These molecules overcome intermolecular forces.The molecules escape from the liquid surface and become part of the gas phase.This constant movement between phases ensures that at equilibrium, the number of gas-phase molecules remains constant if temperature remains unchanged.
The velocity of a car goes from 0 m/s to 60 m/s in a forward direction. What is the best explanation for this change?
When the speed was 0 m/s, the forces acting on the car were unbalanced. When the forces became balanced, the car started to move.
When the velocity was 0 m/s, all the forces acting on the car were balanced. The velocity changed because at least one unbalanced force is acting on the car.
When the inertia was constant, the speed was 0 m/s. The speed changed because the inertia of the car increased.
The force of gravity on all sides was equal at 0 m/s. The velocity of the car increased because the force of gravity on the back of the car increased.
The answer is B
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What determines whether a metamorphic rock is foliated or non-foliated?
the presence or absence of mineral crystals
the water content as a percentage of the rock volume
the number of remaining gas molecules
temperature, pressure, and the original type of rock
the answer is D temperature, pressure,and the original type of rock
The presence or absence of mineral crystals determines whether a metamorphic rock is foliated or non-foliated.
What is mineral?
A mineral is an inorganic solid that forms in nature and has an organised atomic structure and a known chemical composition.
Even while it may seem like a mouthful, if you break it down, it becomes clearer. Minerals are created naturally.
Foliated metamorphic rocks have layers or stripes that result from the alignment and lengthening of the rock's minerals during metamorphism.
Non foliated metamorphic rocks, on the other hand, don't have the minerals that align during metamorphism and don't have layers.
Thus, The presence or absence of mineral crystals determines whether a metamorphic rock is foliated or non-foliated.
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QUESTION 2
What agent causes sand dunes to form?
ocean waves
weathering of old rocks in the desert
the wind carries the sand until it runs into an obstacle
gravity
The answer to your question would be:: the wind because it carries the sand until it runs into an obstacle
Sand dunes: These are small hills made up of lose sand.
During formation of dunes ( in deserts or sea shores) there is creeping of sand particles along one side and there is sliding of sand on other side resulting in formation of a dune.
Thus the agent causes sand dunes to form is the wind carries the sand until it runs into an obstacle
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
_____ helps to destroy animals and plants when they die, preventing them from fossilizing.
Answer:
Decomposers
Explanation:
Decomposers are defined as those organisms that decomposes the organic components of the dead organisms. For example, microbes and saprophytes.
When plants and animals dies, the decomposers eats up the organic substance. These consumption of organic substances helps in the growth and expansion of the microbes.
The decomposers does not allow the organisms to undergo fossilization process. It prevents them from turning into a fossil. The organism completely decays if there is no hard parts present in it.
What three factors set convection currents in motion?
Convection currents are driven by temperature differences, gravity, and the density changes that heat induces in fluids, causing a cycle of rising warm fluid and sinking cool fluid.
Explanation:The three factors that set convection currents in motion are temperature differences, gravity, and the density variations that occur as a result of heating and cooling within a fluid (which can be either a liquid or a gas). In natural convection, warmer parts of a fluid, which are less dense, rise due to buoyant forces, whereas cooler, denser parts sink. This movement can result in the transfer of heat. An example of this is seen in the circulation of air in Earth's atmosphere, where warm air from the equator rises and moves toward the poles while cooler air sinks and moves toward the equator. This entire process is driven by the temperature differences between different parts of the fluid and the action of gravity which acts on the differences in density that temperature changes create.
When a river overflows its banks, it deposits sediment over a broad, flat area of land on both sides of the river. This broad flat area is called a _______.
A broad, flat area of land on both sides of a river, where sediments are deposited when it overflow its banks is called a floodplain.
What is a river?A river can be defined as a large natural body of fresh water that flows continuously into an ocean, lake, sea or another river. Some examples of a river include the following:
River NileMississippiSaint LawrenceDanubeAmazon What is a floodplain?A floodplain simply means a broad, flat area of land on both sides of a river, where sediments are deposited when it overflow its banks. Thus, a floodplain is an area of broad, flat land near a river that is usually flooded when the river overflow its banks or becomes too full.
In conclusion, old rivers are typically characterized by floodplains.
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What could cause a theory to be modified?
Identify the reaction type shown and describe the clues that were used to identify it. Fe2O3 + 2SiO2 → Fe2Si2O7
The answer is synthesis reaction
The explanation:
when synthesis reaction or direct combination reaction is a type of chemical reaction in which two or more simple substances combine to form a more complex product. The reactants may be elements or compounds. The product is always a compound
and we here
Fe2O3 + 2SiO2 → Fe2Si2O7
Fe2O3 is combined with SiO2 and form a more complex product Fe2Si2O7
so this is a synthesis reaction.
This chemical equation represents a synthesis reaction. This identification is based on the fact that the reactant chemical compounds combine to form a single chemical substance that is different from the initial chemical substance.
^sample response, will get you 100%^
1.) What is this group of words?
The cats ran.
A.) a good sentence
B.) comma splice
C.) run-on
D.) fragment
2.) What is this group of words?
The giant turtle named Bob.
A.) a good sentence
B.) comma splice
C.) run-on
D.) fragment
3.) What is this group of words?
Rolling around in the dirt.
A.) a good sentence
B.) comma splice
C.) run-on
D.) fragment
Answer:
1. Answer: A, a good sentence
2. Answer: D, fragment
3. Answer: D, fragment
Explanation:
the first sentence is a complete thought, it has a subject and a verb. Both 2 and 3 are fragments, or the beginnings of sentences.
In the given examples, 'The cats ran.' is a good sentence, 'The giant turtle named Bob.' is a fragment because it lacks a verb, and 'Rolling around in the dirt.' is a fragment as it does not have a clear subject or verb. Option A, D, D is correct.
Let's practice identifying sentence faults and correct the given examples:
The cats ran. This is a good sentence because it has a subject ('The cats') and a verb ('ran') and expresses a complete thought.The giant turtle named Bob. This is a fragment because it lacks a verb showing what the subject is doing or what is happening to the subject. To correct this, we could add a verb, for example: 'The giant turtle named Bob is swimming.'Rolling around in the dirt. This is also a fragment because it is just a phrase without a clear subject performing the action. We can correct this by adding a subject and verb, for example: 'The dog is rolling around in the dirt.'Hence, A. D. D. is the correct option.Which soil layer is the least similar to the underlying rock
PLZ HELP When subjected to heat and pressure, a chemical sedimentary rock can be changed into which rock type?
a non-foliated igneous rock
metamorphic rock
a clastic sedimentary rock
a foliated igneous rock
B. Metamorphic rock
:)
PLEASE HELP!
Which nonmetals have similar chemical properties? Check all that apply.
sulfur
nitrogen
selenium
oxygen
carbon
fluorine
It is sulfur, selenium, oxygen
Sulfur, selenium, oxygen
Explanation;Sulfur, selenium, and oxygen are non-metals that have similar chemical properties. They belong to a group called the oxygen family. Oxygen family is composed of elements oxygen, sulfur, tellurium, selenium and polonium. Each element in this family has six valence electrons in the outermost energy level. They therefore require two electrons to acquire a stable configuration or octet configuration. Thus, they have a valency of two.A paper clip can stay on the surface of a sample of water because of water's strong surface tension. What is the cause of this surface tension? (HINT: review question 6)
Question 6: Why are water molecules attracted to each other? It is neutral. Because of the way oxygen and hydrogen are bonded together, water has an area of positive charge and an area of negatative charge. This makes water a polar molecule. Because of water's polarity, water molecules are attracted to each other.
a vehicle of known mass accelerates along a straight path. according to newtons second law of motion, what caused this acceleration?
An unbalanced force has acted on the vehicle.