a. Write 2-3 sentences describing what happens to a uranium nucleus during nuclear
fission. (2 points)
b. Write 2-3 sentences explaining why nuclear fusion cannot be used in power plants, yet
can still be the original source of the electric energy used in homes. (4 points)
c. Write 3 - 4 sentences evaluating the use of nuclear fission to generate electric energy. Provide at least one point in favor of and two points against using fission. (3 points)
Answers
Answer:
Through their studies of radioactive elements, they discovered nuclear fission.
The atoms then undergo nuclear fission, producing daughter nuclei and more neutrons.
Critical mass is the minimum mass of fissionable material required to sustain a nuclear fission reaction.
Imagine an energy source that is more powerful than nuclear fission or even nuclear fusion.
The products of uranium mining and nuclear fission remain radioactive for hundreds of thousands of years.
Health officials did not test for Strontium 90, a radioactive carcinogenic byproduct of nuclear fission.
And no one's going to be able to invent all the hydrogen-powered cars and nuclear fission energy we're supposed to have in the future.
The development of nuclear fission weapons and later thermonuclear fusion weapons represented an incomparable revolution in weaponry.
The element can be prepared artificially in particle accelerators and is a byproduct of nuclear fission reactions.
Nuclear fusion reactions are like nuclear fission reactions, therefore, in the respect that some quantity of mass is transformed into energy.
Before World War II, German chemists Otto Hahn and Fritz Strassmann discovered nuclear fission.
Element 109 is named meitnerium, for Lise Meitner, who was the first to realize that uranium undergoes nuclear fission.
The reason is that nuclear fission occurs best with neutrons that move at relatively modest speeds, called thermal neutrons
The simple atom bomb owed its explosive power to the energy released by nuclear fission, or fusion.
An atomic bomb is a weapon of mass destruction which uses nuclear fission to produce vast amounts of energy.
These engines use the heat of nuclear fission to drive steam turbines, which in turn charge the batteries.
Pellets of nuclear fuel are contained within the fuel rods of nuclear fission reactors.
It is likely that nuclear fission, hydroelectricity, wind power and direct solar power will be important sources for future electricity generation.
Their research provided the groundwork for other modern-day solutions that use microwave energy and light to propel ships, rather than nuclear fission.
Why is the public too dumb to understand the Privy Council, too unscientific to understand genetic engineering, but is now an expert on nuclear fission? btw this is for c
Answer:
A.When a large, fissile atomic nucleus such as uranium-235 absorbs a neutron, it may undergo nuclear fission.In the first step, a uranium-235 atom absorbs a neutron, and splits into two new atoms, releasing three new neutrons and a large amount of binding energy.
B. One of the biggest reasons why we haven't been able to harness power from fusion is that its energy requirements are unbelievably, terribly high. In order for fusion to occur, you need a temperature of at least 100,000,000 degrees Celsius. That's slightly more than 6 times the temperature of the Sun's core.
C. You would need less uranium to fuel it and it would generate better electricity, but its energy requirements are too high, and we would not be able to control it
Explanation:
Related Questions
Which is the definition of the equator?
A. The equator is half of a sphere, which is used to describe one half of the Earth.
B. The equator is the imaginary line that divides the Earth into two equal parts. It is also used as the basis for the word’s time zones.
The equator is the imaginary line that divides the Earth into two equal parts. It is also used as the basis for the word’s time zones.
C. The equator is an imaginary horizontal line drawn on the Earth equally between the North and South poles.
D. The equator is half of a circle used to describe the northern half of the Earth.
Answers
Answer:
D. The equator is half of a circle used to describe the northern half of the Earth.
Explanation:
hope it helps
Answer: C
Explanation: The equator divides the earth into North and South pole
Hey! I need help with this question.
Will give Brainlest!!
Thanks in advance!
Answers
b) do the same thing as a except use 5m instead of 10m which gives you 2500N
c) the potential energy is transferred to kinetic since he’s at bottom of hill of mechanical energy. so kinetic energy would be 5000J since that’s the mechanical energy since at top of hill there’s 0 kinetic, making all the potential the same as the mechanical
Which effect is created when two sound waves that are close in pitch
interact?
O A. Echoes
O B. Loudness
C. Beats
O D. Intensity
Answers
Answer:
C. Beats
Explanation:
When waves are interfering with each other, the sound is louder in some places and softer in others. As a result, we hear pulses or beats in the sound.
Answer:
beats
Explanation:
got it right
How many kPa’s are in 400 torr?
1. 25kpa
2. 53.3kpa
3. 400kpa
4. 101.3kpa
Answers
What is a star? What is our biggest and closest star?
(Btw i wasn't sure if this was Physics.)
Answers
Answer:
A star is an astronomical object consisting of a luminous spheroid of plasma held together by its own gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night, but due to their immense distance from Earth they appear as fixed points of light in the sky
Explanation:
Question is in the picture ^
Answers
Answer these questions please
Answers
Answer:
1. DEclanation, you can see that location makes a great deal of difference in where the compass points. The angular difference between true north and magnetic north is known as the declination.
2. The Earth's magnetic North Pole is not the same as "true north," or the Earth's geographic North Pole .
3. a change or difference in condition, amount, or level, typically with certain limits.
4. a. It helps them find their way north.
b. They would get lost.
5. a.An orienteering map is a map specially prepared for use in orienteering events. These maps are much more detailed than general-purpose topographic maps, and incorporate a standard symbology that is designed to be useful to anyone, regardless of native language.
b.
The reason for this choice is that orienteers use a magnetic compass to navigate with, so it makes sense for both map and compass to be utilising the same system.
Explanation:
True or False: Warm air has greater air pressure than cool air 21 points
Answers
Answer:
False
Explanation:
Warmer air is less dense than cold, which is why warm air tends to rise and cold air sinks. Being acted on by gravity, colder, denser air weighs more and exerts greater pressure per unit area.
Answer:
False
Explanation:
Cool air is denser than warm air, cool air has greater air pressure than warm air.
list both types of energy before skydiver jumps out of the plane and as the sky diver is diving.
Answers
Answer : This is an example of Kenitic and potential energy
Explanation:
kenitic: the act of moving or motion
potential: not. moving YET
he was not moving when he was on the plane and had potential energy cause he wasn't getting pulled down and kenitic energy was when he was getting pulled down from force of gravity when he was getting pulled to the ground when he was skydiving
help me pls i need the answer
Answers
Explore the intricacies and conceptual challenges of the Holographic Principle in the context of the AdS/CFT correspondence. Investigate the fundamental ideas behind the holographic duality proposed by Juan Maldacena, which suggests an equivalence between a higher-dimensional gravitational theory and a lower-dimensional quantum field theory. Analyze the mathematical foundations and implications of this principle, including the idea that all the information contained within a region of space can be encoded on its boundary. Assess the potential revolutionary impact of the Holographic Principle on our understanding of quantum gravity, black holes, and the nature of spacetime itself.
Answers
Answer:
The Holographic Principle, proposed by physicist Gerard 't Hooft and further developed by Juan Maldacena, is a fascinating concept in theoretical physics that has sparked significant interest and research. In the context of the AdS/CFT correspondence, it suggests that a gravitational theory in a higher-dimensional space can be mathematically equivalent to a quantum field theory in a lower-dimensional space.
At the heart of the Holographic Principle is the idea that the information and dynamics of a higher-dimensional theory can be fully captured by its boundary, implying that the entire bulk can be "holographically" encoded on the boundary. This concept challenges our conventional understanding of the relationship between space, gravity, and quantum mechanics.
The holographic duality proposed by Maldacena specifically relates a gravitational theory in Anti-de Sitter space (AdS) with a conformal field theory (CFT) in one fewer dimension. In this correspondence, the gravitational theory describes a curved space-time with gravity, while the CFT is a quantum field theory without gravity but living on the boundary of the AdS space. The holographic duality suggests that the two theories are mathematically equivalent and provide equivalent descriptions of the same physical phenomena.
The mathematical foundations of the AdS/CFT correspondence involve advanced concepts from string theory and quantum field theory. String theory postulates that fundamental particles are not point-like entities but rather tiny vibrating strings. By considering these strings propagating in a higher-dimensional space, theorists discovered that they naturally give rise to gravity. The holographic duality emerged as a surprising consequence of studying string theory in the AdS space.
The implications of the Holographic Principle are profound. First and foremost, it suggests a deep connection between gravity and quantum mechanics, two fundamental pillars of modern physics that have been notoriously difficult to reconcile. The holographic duality provides a framework to study strongly interacting quantum systems in terms of gravity, enabling insights into the nature of black holes, the behavior of matter in extreme conditions, and other phenomena that are challenging to analyze using traditional methods.
The Holographic Principle also has potential implications for our understanding of black holes. It proposes that the information that falls into a black hole is not destroyed, as suggested by the Hawking radiation phenomenon, but rather encoded on its event horizon. This idea, known as the "holographic encoding of information," has stirred intense debates and ongoing research in the field of black hole information paradox.
Furthermore, the Holographic Principle challenges our traditional notions of spacetime. It suggests that spacetime, as we perceive it, might emerge as an approximation or an emergent property from a more fundamental description involving quantum information. This notion aligns with the concept of "entanglement entropy," which measures the entanglement between quantum states and has been linked to the geometry of spacetime.
The potential revolutionary impact of the Holographic Principle lies in its potential to provide a unified framework for understanding quantum gravity and resolving long-standing mysteries in theoretical physics. It opens new avenues for studying the nature of black holes, the behavior of matter in extreme conditions, and the fundamental structure of the universe. However, it is important to note that the Holographic Principle is still an area of active research, and many aspects of its implications and applications continue to be explored and refined by physicists.
A meteor falls toward Earth's surface. Given that the acceleration due to
gravity is 9.8 m/s^2, what is the meteor's potential energy if it has a mass of 10
kg at an altitude of 400 m?
O A. 408 J
O B. 7,840,000 J
O C. 2J
O D. 39,200 J
Answers
Answer:
39,200J
Explanation:
just took the test
The meteor's potential energy if it has a mass of 10kg at an altitude of 400 m will be 39200 J
What is potential energy ?Potential Energy that depend upon the relative position of various parts of system . It is an energy possessed by an object by virtue of its position or configuration.
mass(m) = 10kg
g (acceleration due to gravity) = 9.8m/s^2
altitude(height (h)) = 400m
Meteor's Potential energy = m * g * h
= 10 * 9.8 * 400 = 39200 J
correct option will be a) 39200 J
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what things would you need to survive in the troposphere?
Answers
Answer: i think it means how we need plants, water, food, and gases from that to survive?
Explanation:
Because of this protection, many molecules are more stable in the troposphere then elsewhere in the atmosphere. This protection makes life possible on Earth.
plz help with atomic math giving brainly
Answers
The tricks above work for any element on the Periodic Table, so feel free to use them! Here is a little way to remen then by:
A = P = E M - A = N
—————————————
T R L M T E
O O E A O U
M T C S M T
I O T S I R
C N R C O
S O N
# N # S
S
I really hope this helps :)
A driver is driving a 6371 kg lorry. After spotting a hazard, the driver applies the brakes. The lorry decelerates uniformly and comes to a stop 60 m after the brakes are applied. Estimate the braking force needed to stop the lorry.
Answers
Answer:
The estimated braking force needed to stop the lorry is zero, based on the given information and calculations. However, it's important to note that this result is likely not accurate, as some force is required to stop a moving object. It's possible that additional information or calculations are needed to obtain a more realistic estimate of the braking force.
Explanation:
To estimate the braking force needed to stop the lorry, we can use Newton's second law of motion, which states that force (F) is equal to mass (m) multiplied by acceleration (a).
In this case, the lorry decelerates uniformly, so the acceleration is constant. The initial velocity is assumed to be zero since the lorry comes to a stop. The final velocity is also zero. Therefore, we can use the equation:
Final velocity squared (vf^2) = Initial velocity squared (vi^2) + 2 * acceleration (a) * distance (d)
Since vi = 0 and vf = 0, the equation simplifies to:
0 = 0 + 2 * a * d
Solving for acceleration (a), we have:
2 * a * d = 0
a = 0
Since the acceleration is zero, it means that the braking force needed to stop the lorry is also zero. This is likely not an accurate result as some force is required to stop the lorry. It's possible that additional information or calculations are needed to accurately estimate the braking force.
The braking force required to stop a 6371 kg lorry after spotting a hazard and applying the brakes is what the question is asking for. The lorry decelerates uniformly and comes to a stop 60 meters after the brakes are applied.
The following steps will guide you on how to calculate the braking force:
Step 1: Determine the mass of the lorry which is 6371 kg. This will be denoted as m.
Step 2: Determine the distance travelled by the lorry, which is 60 m.
Step 3: Determine the time taken by the lorry to stop. This can be done by using the formula for uniform deceleration, which is a = (v-u)/t where v is the final velocity, u is the initial velocity and a is the uniform deceleration. Since the lorry comes to a stop, its final velocity is zero and its initial velocity is unknown.
However, we can assume that the lorry was initially travelling at a constant speed before spotting the hazard. Therefore, we can assume that the initial velocity was equal to the average velocity of the lorry before the brakes were applied.
This can be calculated using the formula v = d/t where d is the distance travelled and t is the time taken. The average velocity can therefore be calculated as follows: v = d/t = 60 m/t
Step 4: Rearrange the formula for uniform deceleration, a = (v-u)/t, to find u which is the initial velocity. Since the lorry comes to a stop, we know that v = 0.
Therefore: u = v - at where a is the uniform deceleration and t is the time taken to stop which is also equal to the time taken for the lorry to travel the distance of 60 meters. Substituting for v, we get: u = - at
Step 5: Calculate the acceleration of the lorry using the formula a = (v-u)/t. Since the final velocity is zero, we get: a = -u/t = -(-at)/t = a The acceleration is negative since the lorry is decelerating.
Step 6: Calculate the braking force using the formula F = ma where F is the braking force and m is the mass of the lorry. Therefore: F = ma = (-ma) since a is negative = (-6371 kg) (a) Therefore, the braking force required to stop the lorry is -6371a N where a is the uniform deceleration calculated in Step 5.
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A student is shown a picture of a large number of stars clumped together without a discernible shape. The student argues that these stars cannot be a galaxy because all galaxies have familiar shapes such as barred, elliptical, and spiral. Is the student correct?
A.
Yes. These stars cannot be a galaxy if they do not form a familiar shape.
B.
The stars cannot be a galaxy, but the student incorrectly lists "barred" as a possible shape. All galaxies are either elliptical, spiral, or spheroidal.
C.
Although all galaxies have familiar shapes, no single image can capture an entire galaxy. If the student could see the entire galaxy, it would have a familiar shape.
D.
No. The stars could be part of an irregular galaxy.
Answers
Answer:
D.
Explanation:
Irregular galaxies have no identifiable shape or structure to them. They are often chaotic in appearance, without a bulge or any trace of spiral arms.
A student shows a picture of many large stars clumped together without a discernible shape. So the stars could be a part of an irregular galaxy. Hence, option D is correct.
What is a Galaxy?All galaxies are collections of stars and other celestial bodies that are gravitationally bound. The cosmos contains more than 100 billion galaxies, each of which has stunning formations visible in photographs captured by telescopes of the far universe.
According to Jenna Samuel, a doctoral candidate in astrophysics at the University of California, Davis, a galaxy can be conceptualized as a collection of stars, gas, and dark matter that are all gravitationally bonded to one another. "What we imagine as a normal galaxy is largely the light section — the stars — that's embedded in a much larger dark matter halo, which spreads much further out," the researcher explained.
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True or false
1. The upper mantle is also known as the mesosphere
2. Earthquakes can be found at both transform and convergent boundaries. However, at
convergent boundaries, the earthquakes are the strongest.
Answers
Answer:
false and true is the correct answer
Answer:
1: false
2:true
Explanation:
number one is false because the upper mantle is known as asthenosphere.
number two is true because at convergent plate boundaries, where two continental plates collide earthquakes are deep and also very powerful. In general, the deepest and the most powerful earthquakes occur at plate collision (or subduction) zones at convergent plate boundaries.
The automobile engine is the largest source of gas.
A carbon dioxide
B oxygen
C nitrogen dioxide
D carbon monoxide
Answers
Answer: D
Since carbon monoxide ppm levels might impair motor abilities and cause headaches, the answer is D. CO gas has no smell, making it difficult to detect. Every year, carbon monoxide poisoning in and around automobiles results in a large number of fatalities and injuries.
Help me out? Please and thank you so much
Answers
Answer:
C) the volume of cylinder B is 5 times the volume of cylinder A
Explanation:
By inspection of the diagram we can see that the radius of both cylinders are the same and the heights are different, so we can automatically discount answer options A and D.
Volume of a cylinder = \(\pi r^2h\)
⇒ volume of A = 100\(\pi\) cm³
⇒ volume of B = 500\(\pi\) cm³
500\(\pi\) ÷ 100\(\pi\) = 5
Therefore, the volume of cylinder B is 5 times the volume of cylinder A
The law of conservation of matter states that matter can be neither created nor destroyed. Your friend shows you the following chemical equation: The equation was CaCO3 →CaO+CO2
He says that because the oxygen atoms are split between two different molecules in the products, the equation does not support the law of conservation of matter. Is your friend right? Explain your answer. Draw a model showing the number of each type of atom in the reactants and products. Use your model to explain your answer.
PLEASE HELP
Answers
Yes, our friend is right, because there is no contradiction to the law of conservation of mass in the above equation. It just the mass of the product is equal to the mass of reactants.. and that is shown in the equation you have presented earlier
Answer:correct
Explanation:
What two gases in the atmosphere do animals and plants need to breathe and grow?
Answers
Answer: Explanation:
Plants and animals each produce the gases that the other needs to live. Plants need carbon dioxide—people and other animals exhale carbon dioxide as a waste product. People and other animals need oxygen—plants produce oxygen during an important process called photosynthesis, which turns the sun's energy into nutrients.
variables that affect the amount of current flowing in a circuit
Answers
Answer:
In a closed electric circuit, resistance of the components and the voltage of a power source are affecting the electric current.
4. The Himalayan Mountains tower as high as 8,854 m above sea level. The rate of plate motion is about 10 cm per year. Use the diagram to explain how the Himalayas formed. Predict how they might look in 10 million years.
Answers
Answer:
Forty million years ago, the continent of India, which was being carried northward by the Indo-Australian plate, collided with Asia forming the Himalayan mountain range (fold mountains). Since the initial encounter, the subcontinent of India has moved 2,000 kilometers farther north at a rate of 5 centimeters a year, sliding beneath Asia as it moves. In 10 million years India will plow into Tibet a further 180km. This is about the width of Nepal.
Answer:Since the initial encounter, the subcontinent of India has moved 2,000 kilometers farther north at a rate of 5 centimeters a year, sliding beneath Asia as it moves. In 10 million years India will plow into Tibet a further 180km. This is about the width of Nepal.
For the effective radiation of heat from an electric heater. Why should we polish it to shine but not keep it clean or paint it green or black?
Answers
Answer:
Polish it to shine
Explanation:
An airplane travels a distance of 4,000 km from New York to Los Angeles in 5 hours. Enter the numerical value for the average speed of the airplane.
Answers
Answer: Divide the km by the hours.
Find 3 simple machines that are used in the backyard?
find what they are and what kind of machine they are.
Answers
Here are three simple machines that are commonly used in backyards:
Wheelbarrow - This is a type of lever. The wheel and axle allow for easier transportation of heavy items.
Shovel - This is a type of inclined plane. The flat, angled blade allows for easier digging and lifting of soil or other materials.
Garden shears - This is a type of lever. The handles act as levers to increase the force applied to the blades for easier cutting of branches and other materials.
Shovel for scooping snow
Garden Sheers
12 POINTS PLUS MARKF BRAINILEST
Answers
Answer:
gas
Explanation:
__________ properties explain how matter changes its identity to form a new substance.
phase
chemical
physical
reaction
Answers
Answer:
chemical properties explain how matter changes its identity to form a new substance.
The chemical properties explain how matter changes its identity to form a new substance. The correct option is B.
What is chemical property?A chemical property is any property of a material that emerges during or after a chemical reaction; that is, any quality that can only be established by changing a substance's chemical identity.
A chemical property is a property of a specific substance that can be observed during a chemical reaction.
Some of the most important chemical properties are flammability, toxicity, heat of combustion, pH value, radioactive decay rate, and chemical stability.
The chemical properties of matter describe how matter changes its identity to form a new substance.
The property of a substance that can be observed or measured when the substance undergoes a chemical change is referred to as its chemical property. A chemical reaction can be used to observe chemical properties.
Thus, the correct option is B.
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What is an ecosystem? Group of answer choices An ecosystem is all different populations of animals in an area. An ecosystem is a community of plants and animals and their physical surroundings. An ecosystem is a single example of a particular species of plant or animal. An ecosystem is all the organisms of a particular kind of species and their surroundings.
Answers
Answer: An ecosystem is a community of plants and animals and their physical surroundings
Explanation: An ecosystem is a geographic area where plants, animals, and other organisms as well as weather and landscape work together to form a bubble of life. Ecosystems contain biotic and abiotic factors both. Biotic factors include plants, animals, and other organism
Answer: An ecosystem is a community of plants and animals and their physical surroundings.
Explanation: Ecosystem plays an essential role for the existence of living organisms in the planet Earth. A balanced ecosystem is attained as a result of various reasons it includes the live ratio of diverse varieties of organisms in a particular ecosystem, necessary physical, biological, and chemical conditions that promotes the living of organisms, and the balanced atmosphere attained as the result of temperature, wind, and humidity.
As all the above mentioned properties are necessary for maintaining a sustainable ecosystem, it is clearly understood that an ecosystem is a community of plants and animals and their physical surroundings.
You will need a magnifying glass and a small piece of scrap paper for this demonstration.
a. Go outside on a sunny day and put the piece of paper on a patch of asphalt, concrete, or a large flat rock. Make sure there is no other combustible material or debris in the vicinity.
b. Hold the magnifying glass so it is close to the paper, with rays of sunlight shining through it. Move the magnifying glass side to side and close or away from the paper until the most concentrated ray of light is shining on the paper. This is the focal point for that magnifying glass.
c. Measure the distance between the focal point and magnifying glass. This is the focal length for that magnifying glass. (Be careful; if you hold the magnifying glass in that place for long enough, the paper will catch fire. Do not ever do this on your skin or clothing, as it can cause serious burns.)
d. Now take the magnifying glass inside and use it to look at the words in a book. What is the focal length now?
Answers
Answer: you did not ask a question baka
Explanation:
the question what is it