Answer: 40 N
Explanation: 25N + 15N
what is a crystalline solid?
Answer:
A crystal or crystalline solid is a solid material whose constituents are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions
Explanation:
your welcome
Which of these materials is an insulator?
Answer:
Plastic, rubber, wood, and ceramics are good insulators. These are often used to make kitchen utensils, such as saucepan handles, to stop heat from flowing up to burn the cook's hand. Plastic coating is also used to cover most electrical wires in appliances. Air is also a good insulator of heat.
Find an everyday situation that involves density or buoyancy and explain it.
Answer:
Explanation:
Swimming. When you go swimming, your body floats but somewhat sinks as well because we weigh less when we're in the water. We are less dense.
Or taking a bath, the soap sinks to the bottom and the washcloth somewhat floats and sinks because of the air trapped in the middle. But the rest of the washcloth is sinking because it's absorbed the water which makes it denser.
Brainliest??
1. A car starts from the rest on a circular track with a radius of 300 m. It accelerates with a constant tangential acceleration of a = 0.75 m/s?. Determine the distance traveled and the time elapsed"
Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.
To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.
The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).
Using the equation:
v = v₀ + at
where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:
v = 0 + (0.75 m/s²) * t
v = 0.75t m/s
The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:
v = ωr
Substituting the values:
0.75t = ω * 300
Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:
ω = ω₀ + αt
ω = 0 + (0.75 m/s²) * t
ω = 0.75t rad/s
We can now substitute the value of ω into the equation:
0.75t = (0.75t) * 300
Simplifying the equation gives:
0.75t = 225t
t = 0.75 seconds
The time elapsed is 0.75 seconds.
To calculate the distance traveled (s), we can use the equation:
s = v₀t + (1/2)at²
Since the initial velocity (v₀) is zero, the equation becomes:
s = (1/2)at²
s = (1/2)(0.75 m/s²)(0.75 s)²
s = (1/2)(0.75 m/s²)(0.5625 s²)
s = 0.2119 meters or approximately 21.19 centimeters
Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.
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A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.00 s for the ball to reach its maximum height. Find (a) the ball’s initial velocity and (b) the maximum height it reaches.
Answer:
initial velocity is0m/s and final velocity is29.4m/s
A cyclist going downhill is accelerating at 1. 2 m/s2. If the final velocity of the cyclist is 16 m/s after 10 seconds, what is the cyclist’s initial velocity? 4 m/s 12 m/s 18 m/s 20 m/s.
Answer:
Initial velocity = 4 m/s
Explanation:
Acceleration, a = 1.2 m/s²
Final velocity, v = 16 m/s
Initial velocity, u = ?
Time, t = 10 seconds
So, we must use the formula:
v = u + at
Insert all the values into the formula.
16 = u + 1.2 × 10
16 = u + 12
Make 'u' the subject of the equation, and solve to find the value of u.
u = 16 - 12
u = 4 m/s
What's the main reason why people use graphs
A robot arm applies 300 N of force to a 0. 5kg object. If their arm swings for 0. 3s , how fast will the object move from the swing?
The object will move with a speed of 180 m/s as a result of the swing. To determine the speed at which the object will move from the swing, we can use Newton's second law of motion.
Newton's second law of motion states that the force acting on an object is equal to the mass of the object multiplied by its acceleration:
Force = mass * acceleration.
In this case, the force applied by the robot arm is 300 N, and the mass of the object is 0.5 kg. We can rearrange the equation to solve for acceleration:
acceleration = Force / mass.
acceleration = 300 N / 0.5 kg.
acceleration = 600 m/s^2.
The acceleration represents the rate of change of velocity over time. In this case, the robot arm swings for 0.3 seconds. Using the equation:
velocity = acceleration * time,
velocity = 600 m/s^2 * 0.3 s,
velocity = 180 m/s.
Therefore, the object will move with a speed of 180 m/s as a result of the swing.
When the robot arm applies a force of 300 N to a 0.5 kg object and swings for 0.3 seconds, the object will move with a speed of 180 m/s. This calculation is based on Newton's second law of motion, relating force, mass, acceleration, and time.
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during the summer, when your lawn is growing quickly, estimate this speed, in m/s . make this estimate from your experience noting, for instance, how often you mow the lawn and what length you trim. during the summer, when your lawn is growing quickly, estimate this speed, in . make this estimate from your experience noting, for instance, how often you mow the lawn and what length you trim. 4×10−8m/s 2×10−4m/s 1×10−13m/s 3×103m/s
Based on the information provided, we can estimate the speed at which your lawn grows during the summer.
To estimate this speed, we can consider how often you mow the lawn and the length you trim.
Let's say you mow the lawn once a week and each time you trim it, you cut the grass by an average length of 5 centimeters.
First, let's convert the length to meters. 5 centimeters is equal to 0.05 meters.
Next, we need to determine the time it takes for the grass to grow back to the length you trim. Since you mow the lawn once a week, we can assume that it takes approximately one week for the grass to grow back to its trimmed length.
Therefore, the speed at which your lawn grows can be calculated by dividing the length by the time it takes to grow back. In this case, it would be 0.05 meters divided by 1 week, which is equal to 0.05 meters per week.
To convert this to meters per second, we need to consider that there are 7 days in a week and 24 hours in a day.
So, there are 7 * 24 = 168 hours in a week. And since there are 60 minutes in an hour and 60 seconds in a minute, there are 168 * 60 * 60 = 604800 seconds in a week.
Now, let's divide the speed in meters per week by the number of seconds in a week to get the speed in meters per second.
0.05 meters per week divided by 604800 seconds per week is equal to approximately 8.27 * 10⁻⁸ meters per second.
Therefore, based on the given information, the estimated speed at which your lawn grows during the summer is approximately 8.27 * 10⁻⁸ meters per second.
Based on your experience of mowing the lawn once a week and trimming it by an average length of 5 centimeters, the estimated speed at which your lawn grows during the summer is approximately 8.27 * 10⁻⁸ meters per second.
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a student is sitting on the right side of a school bus when it makes a right turn. we know that the force of gravity acts downwards and a normal force from the seat acts upwards. if the student stays in place when the bus turns, we also know that there must be a. no other force on the student. b. a force parallel to the seat directed forward on the student. c. a force parallel to the seat directed to the left on the student. d. a force parallel to the seat directed to the right on the student. e. a force parallel to the seat in a direction between forward and left on the student.
When a student is sitting on the right side of a school bus when it makes a right turn, a force parallel to the seat directed to the left on the student. The correct option is c.
There are four fundamental forces: the strong force, the weak force, the electromagnetic force, and the gravitational force. The strong force and the weak force operate only on subatomic particles, whereas the electromagnetic force and the gravitational force act on macroscopic (i.e., everyday) objects.
A force is any interaction that alters or maintains the motion of an object. It's a vector quantity because it has both a magnitude and a direction. The SI unit for force is newtons (N). The forces acting on a student sitting on the right side of a school bus when it makes a right turn are: a force of gravity that acts downwards, a normal force that acts upwards due to the seat, a force parallel to the seat directed to the left on the student if the student stays in place when the bus turns.
So, the correct option is C) a force parallel to the seat directed to the left on the student.
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suppose you want to model girlfriend of a baby orangutan which type of model would you choose
Answer:
That model grilfriend would probably only want me for the cash and would talk to a million other guys...but the baby orangutan would love me and I would be able to take care of a cute baby!!:)
Explanation:
What technologies are in place to reduce ozone
Strategies currently being implemented include:
Vapor recovery nozzles at the gasoline pumps to reduce refueling emissions;
Cleaner burning gasoline reformulated to reduce VOC, NOx and other pollutants;
Strict NOx emission limits for power plants and industrial combustion sources;
Enhanced vehicle inspection programs in states; and
Strict limitations on the solvent usage in factories.
hope this helps
Which occurs during a disequilibrium?
Disequilibrium occurs when the quantity of supply does not equal the quantity of demand.
The market is experiencing a disequilibrium when the market price is above or below the equilibrium price. Whenever markets experience imbalances—it creates disequilibrium prices, surpluses, and shortages—market forces drive prices toward equilibrium.
A surplus exists when the price is above equilibrium, which encourages sellers to lower their prices to eliminate the surplus.
A shortage will exist at any price below equilibrium, which leads to the price of the good increasing.
For example, imagine the price of dragon repellent is currently $6 per can. People only want to buy 400 cans of dragon repellent, but the sellers are willing to sell 600 cans at that price. This creates a surplus because there are unsold units. Sellers will lower their prices to attract buyers for their unsold cans of dragon repellant.
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Materials A, B, and C are solids that are at their melting temperatures. Material A requires 200 J to melt 4 kg, material B requires 300 J to melt 5 kg, and material C requires 300 J to melt 6 kg. Rank the materials according to their heats of fusion. If multiple materials rank equally, use the same rank for each, then exclude the intermediate ranking (i.e. if objects A, B, and C must be ranked, and A and B must both be ranked first, the ranking would be A:Greatest, B:Greatest, C:Third greatest). If all materials rank equally, rank each as 'Greatest'.
Answer:
B: Greatest, A: Second greatest, C: Second geratest.
Explanation:
We can calculate the heat of fusion of a material (ΔHfus), which is the heat required to melt 1 kg of material, using the following expression.
ΔHfus = Q/m
where,
Q: heat providedm: massMaterial A
ΔHfus = 200 J/4 kg = 50 J/kg
Material B
ΔHfus = 300 J/5 kg = 60 J/kg
Material C
ΔHfus = 300 J/6 kg = 50 J/kg
Then, considering the heats of fusion,
B: Greatest, A: Second greatest, C: Second greatest.
A boat travels upstream and after one hour has gone 10 km. the boat next travels downstream and after one hour has gone 18km. if the boats speed relative to the water is constant, what is the speed of the river
Answer:
4 km/h
Explanation:
Let the boat's speed relative to the water be u and the speed of the water be v (both in km/h)
upstream: boat's speed = u - v
during t = 1 hour, the distance is (u - v) * 1 = 10 (1)
downstream: boat's speed = u + v
during t = 1 hour, the distance is (u + v) * 1 = 18 (2)
(2) - (1): 2v = 18 - 10 = 8, so v = 4 km/h
a spherical cavity is hollowed out of the interior of a neutral conducting sphere. at the center of the cavity is a point charge, of positive charge q.
Only the charge present inside the cavity can explain the electric field that exists there. The electric field inside the hollow would remain unchanged as a result.
Each point in space has an electric field associated with it when there is charge present in any form. E, often known as electric field strength, electric field intensity, or just the electric field, is a mathematical constant that expresses the strength and direction of an electric field. To predict what would happen to electric charges nearby a specific point, one only needs to be aware of the value of the electric field there, without having any precise knowledge of what generated the field.
When one charge is thought of as the generator of an electric field that spreads outward into the surrounding space, the electric force is not thought of as a direct interaction of two electric charges that are separated from one another.
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An object is fired with a velocity of 130 ft/s at 60 degrees above the horizontal. Analyze this motion, finding all of the following: Velocity components in both x and y, time, distance traveled, and maximum height reached. NEED ANSWER ASAP
Which type of reaction makes ATP energy
The type of reaction that produces ATP (adenosine triphosphate) energy is called cellular respiration.
Cellular respiration is a biochemical process that occurs in the cells of living organisms, including plants and animals, and involves the breakdown of organic molecules to release energy in the form of ATP.
The overall equation for cellular respiration is:
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP
During cellular respiration, organic molecules, such as glucose, are oxidized in a series of enzyme-catalyzed reactions. These reactions occur in three main stages: glycolysis, the citric acid cycle (also known as the Krebs cycle), and oxidative phosphorylation (also known as the electron transport chain).
In glycolysis, glucose is converted into pyruvate molecules, producing a small amount of ATP and NADH (nicotinamide adenine dinucleotide).
The pyruvate molecules then enter the citric acid cycle, where they undergo further oxidation to produce additional ATP, NADH, and FADH₂ (flavin adenine dinucleotide).
The NADH and FADH₂ molecules produced in glycolysis and the citric acid cycle then enter oxidative phosphorylation, which takes place in the inner mitochondrial membrane. Here, electrons from NADH and FADH₂ are passed through a series of protein complexes, creating a proton gradient across the membrane.
The flow of protons back into the mitochondrial matrix drives the synthesis of ATP through the enzyme ATP synthase. This process is known as chemiosmosis.
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A city of 6000 population has an average water use of 110 gallons per person per day. Compute the average total rate of use in cubie feet per second and in gallons per minute. (1 eu ft- 7.48 gal.)
The average total rate of water use in the city is 6.23 cubic feet per second and 583.33 gallons per minute, which can be calculated using simple arithmetic operations and unitary method.
To compute the average total rate of use in cubic feet per second and in gallons per minute, we need to first find the total amount of water used per day in the city. This can be done by multiplying the population by the average water use per person:
6000 * 110 gallons/person/day = 660000 gallons/day
To find the average total rate of use in cubic feet per second, we need to convert the daily usage to cubic feet and divide it by the number of seconds in a day:
660000 gallons/day * (1 cubic foot/7.48 gallons) = 87809.6 cubic feet/day
87809.6 cubic feet/day / (24 hours/day * 3600 seconds/hour) = 6.23 cubic feet/second
To find the average total rate of use in gallons per minute, we simply divide the daily usage by the number of minutes in a day:
660000 gallons/day / (24 hours/day * 60 minutes/hour) = 583.33 gallons/minute
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Which of Newton's laws of motion describes the motion of an object that has a net
force of ON?
Newton's first and second laws of motion both do, but I think the one you're looking for is: The First Law of Motion. That description is a little more direct.
It says that if an object is not acted on by a net external force, then it continues in "constant, uniform motion".
Studying neutrinos helped to explain how our Sun works but led to changes in theories of particle physics, how is this process consistent with the scientific process? How can details about a theory be adjusted without undermining other discoveries made through the theory's predictions?
Explanation:
Yes, evidently, the process is consistent with the scientific process because in scientific process falsification and modification are two very important traits. So this new concept have modified the existing theories.
Through the modification a theory is adjusted without undermining other discovering made through the theory's prediction.
There are many other evidences that prove this fact for example Einstien's Theory of relativity also changes the existing concepts.
Among the reasons for the frequent use of composite measures is(are) that:
a. the researcher is seldom able to develop in advance single indicators of complex concepts.
b. a single data item might not have enough categories to provide a range of variation.
c. composite measures give a more comprehensive and accurate indication of a given variable.
d. they are efficient data reduction devices.
e. all of these choices.
Among the reasons for the frequent use of composite measures is that they give a more comprehensive and accurate indication of a given variable. Besides, the researcher is seldom able to develop in advance single indicators of complex concepts. A single data item might not have enough categories to provide a range of variation. And lastly, they are efficient data reduction devices.
So, the correct answer is option (e) all of these choices.
What are composite measures?Composite measures are used to combine several variables or scores into a single measurement or index. In other words, they are multidimensional measurement tools. It is useful to make this kind of index because it is possible to calculate the reliability and validity of composite measures, which are statistical measures that indicate whether or not the measurements were conducted accurately or are otherwise legitimate.
For example, if a researcher wants to assess the economic development of a country, he/she could create a composite measure by combining data on GDP per capita, literacy rates, and poverty rates. In this case, each of the three variables reflects a different aspect of economic development.
So, the correct answer is E.
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A Projectile is launched horizontally from a height of 120m. If it lands 300 ft away from where it was launched, how fast was it launched?
The initial speed of the projectile is 18.5m/s
What is a projectile ?Projectile motion is the motion of an object thrown into the air under gravity. Examples of projectiles include a fired bullet, a thrown javelin e t.c
When a projectile is launched horizontal, it's horizontal range is given as R = u(√2h/g)
R = 300ft = 91.44meters
h= 120m
therefore 91.44= u( √ 2×120/9.8)
91.44 = u ( √24.49)
91.44 = 4.95 u
divide both sides by 4.95
u = 91.44/4.95
u = 18.5m/s
therefore the speed of the projectile is 18.5m/s
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Calculate the power of the heater in W.
Answer:
to calculate power of heater in w
In general, the power required by electrical heating is calculated in watts. Wattage: Multiply the area in feet by 10. For a room 20 feet by 20 feet, we obtain 400 sq. ft., multiplied by 10 to give 4000 watts
Answer:
240 watt heater
Explanation:
Just look at only the L side of the graph
the liquid is heated from - 20 to 40 = 60 C
so the J of heat required = .8kg * 1000 j /kg-C * 60 C = 48 000 J
this heat is put into the system over 200 seconds
48000 J / 200 seconds = 240 watts
The wine poured in the pot_______ heat,. Increasing in its molecular collisions that overcome the intermolecular attraction forces. Almost immediately, part of the wine_______. You cover the pot with a lid, to let the beef cook slowly and become tasty
Heat the saucepan after the wine has been added. Growing molecular collisions that defeat the forces of intermolecular attraction. A portion of the wine starts to boil away almost instantly.
What's a good illustration of molecular attraction?Example: The polar H2O molecules are drawn to the sodium and chloride ions in the beaker when NaCl and water are combined there. This interaction's potency is determined by: how big the dipole moment is.
What draws molecules together?
Polar molecules line up so that their positive ends interact with each other's negative ends. Unlike the atoms' covalent bonds in a molecule (intramolecular bonding)
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Assume that it is now January 1, 2022. Wayne-Martin Electric Inc. (WME) has developed a solar panel capable of generating 200% more electricity than any other solar panel currently on the market. As a result, WME is expected to experience a 14% annual growth rate for the next 5 years. Other firms will have developed comparable technology by the end of 5 years, and WME's growth rate will slow to 5% per year indefinitely. Stockholders require a return of 12% on WME's stock. The most recent annual dividend (Do), which was paid yesterday, was $1.75 per share. a. Calculate WME's expected dividends for 2022, 2023, 2024, 2025, and 2026. Do not round intermediate calculations. Round your answers to the nearest cent. D2022 = $ X D2023 = $ D2024 = $ X D2025 = $ D2026 = $ b. Calculate the value of the stock today, Po. Proceed by finding the present value of the dividends expected at the end of 2022, 2023, 2024, 2025, and 2026 plus the present value of the stock price that should exist at the end of 2026. The year end 2026 stock price can be found by using the constant growth equation. Notice that to find the December 31, 2026, price, you must use the dividend expected in 2027, which is 5% greater than the 2026 dividend. Do not round intermediate calculations. Round your answer to the nearest cent. X S C. Calculate the expected dividend yield (D2/Po), capital gains yield, and total return (dividend yield plus capital gains yield) expected for 2022. (Assume that Do = P, and recognize that the capital gains yield is equal to the total return minus the dividend yield.) Do not round intermediate calculations. Round your answers to two decimal places. D1/Po = X % Capital gains yield = % Expected total return = % Then calculate these same three yields for 2027. Do not round intermediate calculations. Round your answers to two decimal places. D/Ps = % Capital gains yield = % Expected total return = %
a) D2022 = $1.9975, D2023 = $2.27715, D2024 = $2.60554, D2025 = $2.98868, D2026 = $3.43243
b) Po = $13.63
c) Dividend yield = 13.85%, Capital gains yield = 74.52%, Expected total return = 88.37%. Dividend yield = 17.89%, Capital gains yield = -23.29%, Expected total return = -5.40%.
a) Dividend is the distribution of earnings to shareholders. Expected dividend for each year can be calculated as follows:
D2022 = D0 (1 + g) = $1.75 (1 + 0.14) = $1.9975
D2023 = D2022 (1 + g) = $1.9975 (1 + 0.14) = $2.27715
D2024 = D2023 (1 + g) = $2.27715 (1 + 0.14) = $2.6055415
D2025 = D2024 (1 + g) = $2.6055415 (1 + 0.14) = $2.98868161
D2026 = D2025 (1 + g) = $2.98868161 (1 + 0.14) = $3.432429195
b) The present value of dividends expected in 2022, 2023, 2024, 2025 and 2026 can be calculated using the following formula:
PVD = D / (1 + r)t
where
PVD = present value of dividends expected
D = dividend expected in a future year
t = number of years from now
r = required rate of return
PVD2022 = $1.9975 / (1 + 0.12)¹ = $1.77700934579
PVD2023 = $2.27715 / (1 + 0.12)² = $1.88843867485
PVD2024 = $2.6055415 / (1 + 0.12)³ = $1.99719364693
PVD2025 = $2.98868161 / (1 + 0.12)⁴ = $2.10928913223
PVD2026 = ($3.432429195 + ($3.432429195 * 1.05)) / (1 + 0.12)⁵ = $2.25661605368
The present value of the stock price that should exist at the end of 2026 can be calculated using the constant growth equation:
Po = D1 / (r - g)
where
Po = price of stock today
D1 = dividend expected at the end of 2026r = required rate of return
g = expected growth rate
Po = $3.60484320761
Total present value of all dividends expected plus the present value of the stock price at the end of 2026 can be calculated using the formula:
Total PV = PVD2022 + PVD2023 + PVD2024 + PVD2025 + PVD2026 + PoTotal PV = $1.77700934579 + $1.88843867485 + $1.99719364693 + $2.10928913223 + $2.25661605368 + $3.60484320761 = $13.6333900619
The value of the stock today, Po, is $13.63.
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what was the history of a trebuchet
Answer:
The trebuchet was invented in France and was first reported to be used in 1124AD in the siege of Tyre (in present-day Lebanon) during the Crusades. As it was much more powerful than a catapult, a trebuchet became the siege weapon of choice.
Explanation:
Most people think that the trebuchet is a medieval weapon, but actually, it has its origins in ancient China. The ancient Chinese trebuchet could throw huge boulders up to 250 pounds, a distance of 200 feet. In addition, it was lightweight and mobile which was crucial as it could be moved around the battlefield with ease. The thing I love about the chinese trebuchet is that it pushes the boundaries of ancient engineering to create a ballistics revolution - a flexible, portable, killing machine.
Write down any four points that should be considered during household wiring
Answer:
USE RUBBER CLOVES
USE A PLIER
USE CONDUCTIVE WIRES
SWITHC OFF THE MAIN SWITCH WHILE WIRRING
Explanation:
Please help me, I’m confused on where to start.
Answer:
D
Explanation:
What happens during nuclear fission?
Answer:
During nuclear fission, a neutron collides with a uranium atom and splits it, releasing a large amount of energy in the form of heat and radiation. More neutrons are also released when a uranium atom splits. These neutrons continue to collide with other uranium atoms, and the process repeats itself over and over again.
Explanation:
In nuclear fission the nucleus of an atom breaks up into two lighter nuclei. The process may take place spontaneously in some cases or may be induced by the excitation of the nucleus with a variety of particles (e.g., neutrons, protons, deuterons, or alpha particles) or with electromagnetic radiation in the form of gamma rays. In the fission process, a large quantity of energy is released, radioactive products are formed, and several neutrons are emitted. These neutrons can induce fission in a nearby nucleus of fissionable material and release more neutrons that can repeat the sequence, causing a chain reaction in which a large number of nuclei undergo fission and an enormous amount of energy is released. If controlled in a nuclear reactor, such a chain reaction can provide power for society’s benefit. If uncontrolled, as in the case of the so-called atomic bomb, it can lead to an explosion of awesome destructive force.
Answer:
In nuclear fission, atoms are split apart, which releases energy. All nuclear power plants use nuclear fission, and most nuclear power plants use uranium atoms. During nuclear fission, a neutron collides with a uranium atom and splits it, releasing a large amount of energy in the form of heat and radiation.