as generations of stars are born and die, what happens to the abundance metals in the galactic disk?
Answers
As generations of stars are born and die, the abundance of metals in the galactic disk increases. This is because each successive generation of stars contains more heavy elements (metals) than the one before it. When stars die, they release these metals into the interstellar medium, enriching it with heavier elements. Over time, this process has led to the current level of metallicity in the galactic disk, which is much higher than it was when the first stars formed.
This process of enrichment is important for the formation of planets and the evolution of life, as many of the elements that are essential for life, such as carbon and oxygen, are metals.
Its thickness is 1,000 light years throughout most of the disk, but there is a spheroidal bulge at the center of the galaxy that is 12,000 light years in diameter.
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Related Questions
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Answers
A student lifts a basketball to a height of 6 feet and lets the ball drop to the ground. Which statement accurately compares the ball's energy at a height of 6 feet (at rest) and at a height of 2 feet (falling)?
A.
The ball's kinetic energy is the same at both heights, but its potential energy is different.
B.
The ball has less potential energy and more kinetic energy at 6 feet than at 2 feet.
C.
The ball's potential energy is the same at both heights, but its kinetic energy is different.
D.
The ball has more potential energy and less kinetic energy at 6 feet than at 2 feet.
Answers
Answer:C
Explanation:
If you are holding the ball that would be the ball would have potential energy since it it not moving. Once you drop the ball it will have kinetic energy since it’s moving. If you drop the ball from 6ft it will have more kinetic since it will have more time to accelerate. If you drop the ball from 2ft then it will have less kinetic energy since it is closer to the ground and won’t have beeping time to accelerate and get rid of the potential energy.
Answer:
c
Explanation:
During the episode, Professor Farnsworth says that the mass of each duplicate Bender is 60% of the mass of the Bender from which they were created. Determine whether or not the professor is correct, and explain your answer.
Answers
The professor's statement is correct. He said that each duplicate Bender has a mass that is 60% of the original Bender's mass.
This means that if the original Bender weighed 100 pounds, each duplicate Bender would weigh 60 pounds. When duplicates are created, they are not exact replicas of the original. Some of the mass is lost during the duplication process. The duplicates are made from a smaller amount of material, which means they have a lower mass.Assuming each duplicate Bender has a mass equal to 60% of the original Bender's mass, we can say that the mass of the duplicates is proportional to the original. This is because the mass of each duplicate is a fixed percentage of the mass of the Bender they were created from, and this relationship holds true for all duplicates.
Thus, Professor Farnsworth's statement is correct. Each duplicate Bender does have a mass that is 60% of the mass of the original Bender. This is due to the loss of mass during the duplication process.
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Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
Answers
If the emergency air line breaks or gets pulled apart while driving, the loss of pressure will cause the emergency parking brakes to activate automatically.
This is a safety mechanism designed to bring the vehicle to a stop and prevent it from moving any further. The emergency brakes are spring-loaded, which means they engage automatically when air pressure is lost.
Once the brakes are engaged, the vehicle will not be able to move until the air line is fixed and pressure is restored.
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A man drives south to work every day. If his 55 mile
commute usually takes 0.75 hours, what is his average velocity?
Answers
Answer:
73.34 mph to 2dp
Explanation:
veolcity = distance/ time
55 / 0.75 = 73.34 mph
Vedant swims in a 90 m long pool from A to B and returns back to A, in one minute. Calculate his average speed.
Answers
Answer:
His average speed is 1.5 meters per second.
Explanation:
Given:
Distance = 90 meters
Time = 1 minute = 60 seconds
equation...
Average Speed = Total Distance / Total Time
so...
Average Speed = 90 meters / 60 seconds
then the answer would be...
Average Speed = 1.5 meters per second
a person wearing roller skates is standing in front of a wall. assume that the wheels on the skates are good enough that they roll ideally. the person pushes off the wall and begins traveling away from the wall. call the initial state when the person was standing at rest in front of the wall with her hand touching the wall. the final state is when she has traveled 2.1 m away from the wall and is moving at a constant speed of 0.69 m/s. for which of the following systems does the energy remain constant? click for a hint a. system: girl b. system: wall c. system: girl wall d. none of the above. a person is jumping on a trampoline. after coming off of the trampoline, the person is in the air for 1.1 seconds. call the initial state when the trampoline is at its lowest point with the person still on the trampoline. the final state is 0.88 seconds after the person comes off the trampoline. for which of the following systems does the energy remain constant? a. system: person earth b. system: trampoline c. system: person trampoline earth d. system: person e. system: person trampoline f. none of the above. pushing a box up a ramp / car crash you push a box up a ramp (friction between the box and the ramp is not negligible). call the initial state when you begin to push the box. call the final state after you have pushed the box up the ramp a distance of 0.5 m and it is moving with a speed of 2 m/s for which of the following systems does the energy remain constant? a. system: box ramp earth you b. system: box ramp c. system: you d. system: box e. system: box ramp earth f. none of the above. two cars are driving down the road. they notice that they are going to crash, so both drivers slam on the brakes. the cars skid, but still collide. the cars stick together and eventually slide to a stop. call the initial state just before the drivers apply the brakes and the final state just after the collision had occurred. treat this situation as realistically as possible. for which of the following systems does the energy remain constant? a. system: both cars b. system: both cars the ground c. system: the first car d. system: the second car e. none of the above.
Answers
In the first scenario, the energy would be conserved in the system of the girl-wall, The correct answer is option c
In the second scenario, the energy would be conserved in the system of the person-trampoline-earth, The correct answer is option c
In the third scenario, the energy would be conserved in the system of the box-ramp-earth, The correct answer is option a
In the fourth scenario, in a realistic scenario, the energy would not be conserved in any of the given systems due to external work done on the system. The correct answer is option e
For the first scenario of a person wearing roller skates, assuming there is no external work done on the system, the system of the girl-wall would be the appropriate system to consider. The energy would not be conserved in any other system, as there would be external work done on the system due to forces acting on the girl, wall, or both. Therefore option c is correct.
For the second scenario of a person jumping on a trampoline, assuming there is no external work done on the system, the appropriate system to consider would be the system of the person-trampoline-earth, as the energy would be conserved within this closed system.
None of the other systems would conserve energy, as external work would be done on the system due to the forces acting on the person, trampoline, and/or Earth. Therefore option c is correct.
For the third scenario of pushing a box up a ramp, assuming there is no external work done on the system, the appropriate system to consider would be the system of the box-ramp-earth, as the energy would be conserved within this closed system.
None of the other systems would conserve energy, as external work would be done on the system due to the forces acting on the box, ramp, and/or Earth. Therefore option a is correct.
For the fourth scenario of two cars colliding and coming to a stop, it is important to note that in a realistic scenario, there would be external work done on the system due to forces such as friction, air resistance, and deformation of the cars.
Therefore, the energy would not be conserved in any of the given systems. However, if the scenario were simplified to only consider idealized, perfectly elastic collisions in a vacuum, then the system of both cars would conserve energy. Therefore option e is correct.
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The diagram below shows a rock suspended above an
overflow container filled with water up to the overflow
spout. A graduated cylinder is positioned next to the
container to collect water that comes out of the overflow
spout. Which property of the rock can be directly determined
when the rock is placed in the overflow container?
rock
overflow
.
spout
A. mass
B. density
C. volume
D.
hardness
Answers
Answer:
C. Volume
Explanation:
it displaces an equal amount of water to the amount of space it occupies.
Answer: i don't know
Explanation: still
By what means can the internal energy of a closed system increase?.
Answers
Answer:
when work is done on the system or heat comes into the system
the inner and outer surface temperatures of a glass window 5 mm thick are 15 and 5ºc. what is the heat loss through a 1 m × 3 m window? the thermal conductivity of glass is 1.4 w/m.k.
Answers
The following equation may be used to determine heat loss via a glass window: Q = k * A / (T1 - T2) where Q denotes heat loss The thermal conductivity of glass.
(in W/m.K) is given by k. A denotes the window's surface area (in m2). T1 is the temperature of the inner surface (in degrees Celsius). T2 is the temperature of the outer surface (in degrees Celsius).The following equation may be used to determine heat loss via a glass window: Q = k * A / (T1 - T2) where Q denotes heat loss The thermal conductivity of glass. The thickness of the glass is denoted by d. When we plug in the values, we get: Q = 1.4 * (1 * 3) * (15 - 5) / 0.005 Q = 1.4 * 3 * 10 / 0.005 Q = 1.4 * 600 / 0.005 Q = 840 / 0.005 Q = 168000 W As a result, the heat loss through a 1 m 3 m glass window with a 5 mm thickness and a temperature differential is 10 °C is equal to 168000 W.
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2 Which of the following effectively summarizes paragraph 2?
A The orientation in space, relative to the Sun, is the cause
of Earth's seasonal changes.
1
B There is an imaginary pole running through the center of
Earth from the North Pole to the South Pole, which is called
an axis.
C We also learned that Earth's axis is tilted 23.5
degrees from the perpendicular of the plane of the
ecliptic.
D The northern hemisphere has more daylight hours.
Answers
Answer:B
Explanation:
The statement that summarizes the paragraph is northern hemisphere has more daylight hours.
What is Earth?The Earth is part of the nine planet and it comprises of the equator, northern and southern hemisphere.
It is the most suitable place for living because it have water,oxygen and other gases that support life.
Therefore, The statement that summarizes the paragraph is northern hemisphere has more daylight hours.
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if the ectopic impulse arises from the middle of the right atrium the p' wave is:
Answers
An ectopic heartbeat is an irregular heartbeat that happens when the heart's sinoatrial node (SA node), which is its normal heartbeat pacemaker, is disrupted. Ectopic beats originate from a location outside of the SA node, disrupting the normal heart rhythm. When it comes to the various types of ectopic beats, the most common is premature ventricular contraction (PVC).
If the ectopic impulse arises from the middle of the right atrium, the P wave will be abnormal. This occurs when the heart's ventricles experience an unexpected electrical impulse, causing them to contract prematurely. The P wave is a wave that appears on an electrocardiogram (ECG) and represents the electrical activity of the atria. The sinoatrial node generates a normal P wave, which spreads through both atria and then travels to the atrioventricular node, which slows the impulse and transmits it to the ventricles. P’ waveIf the ectopic impulse arises from the middle of the right atrium, the P' wave is abnormal.
As a result, the ECG can display the following:P waves with a single, smooth contour that are narrower than normal, P waves that have a pointed apex and are taller than normal, and P waves that merge with other waves, making them indistinguishable on the ECG.P prime waves, which are visible on an ECG, are related to supraventricular beats. They're usually seen in the early part of a supraventricular tachycardia event, which is a fast heart rate originating from the atria.
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5. A cougar with a mass of 80 kg is standing at the edge of a cliff. Find the cougar’s potential energy if the cliff is 70 m high.
Answers
Answer:
54880
Explanation:
a reaction occurs in which carbon combines with sulfur to form carbon disulfide is this a chemical reaction or a nuclear reaction and how do you know
Answers
Answer:
a chemical reaction where electrons mix.
Explanation:
A nuclear reaction is when atomic nuclei combine, forming a new chemical element
A chemical reaction occurs when electrons from the last layer of atoms mix, forming molecules that have the same chemical elements as the reactants.
According to these definitions
C + 2 S → CS2
in a chemical reaction where electrons mix.
Answer:
This is a chemical reaction, because only the electrons were rearranged.
if there is no change in the charge distributions, what is the direction of the net electrostatic force on an electron located at the center of the circle?
Answers
If there is no change in the charge distributions, the direction of the net electrostatic force on an electron located at the center of the circle would be zero.
The electric field is a force that acts on a charged particle in an electric field. The electric field exerts a force on a charged particle that is proportional to the charge on the particle and the strength of the electric field.The force is exerted in the direction of the electric field. If an electron is placed in the electric field, it will experience a force in the opposite direction to the electric field.
When a charged particle is placed in a uniform electric field, the net electrostatic force on the particle is zero, as the direction of the force is opposite to the direction of the electric field.This can be understood through the principle of superposition. Since there is no change in the charge distribution, the electric field at the center of the circle will be zero. Therefore, the net electrostatic force on an electron located at the center of the circle will be zero.
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what are 3 chemical properties to plastic
Answers
Answer:
holla at me!!!!!!!!!!????
resistance and reaction to various chemical products and process.
Which is a limitation of using cellulose?
its lack of mass production
its lack of biodegradability
3
its harm to landfills
O its high cost to recycle
Answers
Answer:
Its lack of mass production
Explanation:
Your Welcome;)
The limitation of using cellulose is its lack of mass production.
Cellulose is a polymer of glucose. It is obtained from glucose by condensation polymerization to yield a long chain.
Cellulose materials have a high potential of being quite useful as important materials for diverse applications.
However, the problem with cellulose materials is that they can not really be mass produced. This limitation has long encumbered the possibility of using cellulose materials for various applications in material science.
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Please help this is about ecology. Who ever answers it first correctly I will give brainliest
Answers
What causes a snowflake to melt on your tongue?
Answers
Answer:
thermal energy
Explanation:
heat transfers into it causing it to physically change
Answer:
A pesar de las diferencias entre cada copo de nieve y las grandes familias de copos que existen, estos todavía tienen una base hexagonal. Esta estructura hexagonal se explica por la forma en que las moléculas de agua se unen para formar un cristal
Despite the differences between each snowflake and the large families of flakes that exist, they still have a hexagonal base. This hexagonal structure is explained by the way in which water molecules come together to form a crystal.
Explanation:
mn
In a nuclear reactor, electricity is produced from
Answers
Answer:
Nuclear reactors are the heart of a nuclear power plant. They contain and control nuclear chain reactions that produce heat through a physical process called fission. That heat is used to make steam that spins a turbine to create electricity
~+lil more info!+~
What material is used to power a nuclear reactor?
uranium !
All commercial power reactors are based on nuclear fission. They generally use uranium and its product plutonium as nuclear fuel, though a thorium fuel cycle is also possible.
DUE DECEMBER 17 PLZ HELP: 8.9227812e+39/310,393x453,674+7,829-4=8.222222?
Answers
Answer:
When i was doing the problem i got no solutions
Hopes this helps!
the insurance services office (iso) formula uses ___ of a tender's total tank capacity to account for water lost or undischarged and remaining in the tank after the dump valve is closed. (467)
Answers
The insurance services office (ISO) formula uses a specific percentage of a tender's total tank capacity to account for water that is lost or undischarged and remains in the tank after the dump valve is closed.
The ISO formula is a method used by insurance services to calculate the effective water capacity of a fire tender or tanker truck. This formula takes into account the water that may be lost or undischarged and remains in the tank after the dump valve is closed. The percentage used in the formula varies and is typically determined based on industry standards and regulations.
By considering this percentage, the effective water capacity of the tender can be determined, which is the amount of water that can be reliably utilized for firefighting purposes. This calculation helps insurance companies assess the firefighting capabilities of the tender and determine appropriate coverage and premiums.
The specific percentage used in the ISO formula may vary depending on factors such as the type of tender, design specifications, and local regulations. It is important for fire departments and insurance providers to adhere to these guidelines to ensure accurate assessments of the water capacity and firefighting capabilities of the tenders.
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label the axon, motor end plates (neurotransmitter receptor), calcium channel, synaptixk vesicles, Neurotransmitter, synapsie in the photo
1.
2.
3.
4.
5.
6.
Answers
The activity occurring at an axon terminal involves the following labelled 1 - 6:
synaptic vesiclessynapsemotor end plates (neurotransmitter receptor)calcium channelneurotransmittersaxonThe transmission of nerve impulses between neurons, muscles cells or glands is known as nervous transmissions.
Axons are long slender projections of neurons which are responsible for nervous transmission.
Neurons use both electrochemical signals and chemicals known as neurotransmitters to transmit impulses from one neuron to the next.
The junction between two neurons or an effector cell is known as a synapse.
Neurotransmitters are packaged into synaptic vesicles at the axon end. When electrical signal reaches the end of the axon, influx of calcium ions through the calcium channel cause the the synaptic vessels to fuse with the presynaptic membrane and then release their contents into the synaptic cleft or space.
The neurotransmitters released then bind to the motor end plate resulting in another impulse transmission along the second neuron or an action by effector cells.
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How is the kinetic energy of the particles that make up a substance different
after it changes state?
A. The kinetic energy is less after a substance changes from liquid to a gas
B. The kinetic energy is less after a substance changes from gas’s to a liquid
C. The kinetic energy is greater after a substance changes from a liquid to a solid
D. The kinetic energy is greater after a substance changes from a plasma to a gas
Answers
We have that The kinetic energy is less after a substance changes from gas’s to a liquid
Because Liquid state is a more rigid or tightly held state for atom of a substance
Option B
From the question we are Given
The kinetic energy is less after a substance changes from liquid to a gas The kinetic energy is less after a substance changes from gas’s to a liquid The kinetic energy is greater after a substance changes from a liquid to a solid The kinetic energy is greater after a substance changes from a plasma to a gas
Generally
Kinetic energy of a substance changes as it changes state.Kinetic energy is the energy possessed by an object in motion.
Therefore
The four states which are Plasma,Solid liquid and gaseous state allow greater kinetic energy the lighter there bond.
Therefore
The kinetic energy is less after a substance changes from gas’s to a liquid
Because Liquid state is a more rigid or tightly held state for atom of a substance
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Einstein calculated that ripples of gravity travel at exactly the speed of _____
Answers
Answer:
299,792,458 m/s = speed of light
Explanation:
A vertical spring stretches 3.9 cm when a 10.-g object is hung from it. The object is replaced with a block of mass 25 g that oscillates up and down in simple harmonic motion. Calculate the period of motion.
Answers
seconds
What problem can you imagine coming from using digitized
DNA storage?
Answers
Answer: There are many problems associated with digitized DNA storage.
Explanation:
The cost of encoding the DNA data is high and lot of working efficiency is required for the same. The encoding process requires a considerable amount of time and encoding is slow. It takes about 400 bytes per second. This is done in a silicon memory chip. The process is millions of times slower.
Captain Chip the pilot of a 60,500 kg jet plane, is told that he must remain in a holding pattern over the airport until it is his turn to land. If Captain Chip flies his plane in a circle whose radius is so o km once every 300 min, what centripetal force must the air exert against the wings to keep the plane moving in a circle?
Answers
The centripetal force that must be exerted against the wings to keep the plane moving in a circle is 3.71 × 10⁴ N.
Given that,
Time = 30 min = 30 × 60 sec = 1.8 × 10³ s
Radius = 50 km = 50× 10³ m = 5× 10⁴ m
We know the expression for velocity as,
v = 2πr/(T) = (2π×5× 10⁴) /(1.8 × 10³) = (π×10⁵)/(1.8 × 10³) = (100× 3.14)/1.8 = 174.44 m/s ≈ 175 m/s
Mathematically, centripetal force can be written as,
F = mv²/r = (60,500× 175²)/(5× 10⁴) = 3.71 × 10⁴ N
Thus, required centripetal force is 3.71 × 10⁴ N.
The question is incomplete. The complete question is ' Captain Chip, the pilot of a 60,500-kg jet plane, is told that he must remain in a holding pattern over the airport until it is his turn to land. If Captain Chip flies his plane in a circle whose radius is 50.0 km once every 30.0 min, what centripetal force must the air exert against the wings to keep the plane moving in a circle?'
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Use the information from the graph to answer the
What is the total displacement of the object?
question.
m
Velocity vs. Time
Velocity (m/s)
40
30
20
10
0
Time (s)
0
5
10
15
20
25
Answers
Answer:
The total displacement 560 m
Explanation:
Given:
t₀ = 0 s
t = 25 s
V₀ = 10 m/s
V = 35 m/s
___________
D - ?
Acceleration:
a = (V - V₀) / (t - t₀) = (35 - 10) / (25 - 0) = 25 / 25 = 1.0 m/s²
The total displacement:
D = V₀·t + a·t² / 2
D = 10·25 + 1.0·25² / 2 ≈ 560 m
If no forces are acting on a moving object, the object will continue to move with constant: Group of answer choices impulse momentum acceleration All of these. None of these.
Answers
Answer:
constant acceleration,
Explanation:
when an object is moving without any change in direction,its acceleration is regarded as zero which also means that the object is moving at a constant acceleration.
If no forces are acting on a moving object, the object will continue to move with constant momentum.
To find the answer, we need to know about the force.
What is force?Force is the rate of change of momentum with respect to time.Its SI unit is Newton. It's a vector quantity.What does happen, if force is zero?Force is zero means the rate of change of momentum with respect to time is also zero.Therefore, if the momentum is not changing with time, then it's constant over time.Thus, we can conclude that if no forces are acting on a moving object, the momentum is constant.
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