0 kg m/s
ExplanationMomentum is a force that a thing has when it is moving which means when an object is moving only then it will have a non-zero momentum. If an object is stationary, then its momentum is zero.
Formula to calculate the momentum of a moving object multiply the mass of the object times it's velocity.
Momentum = Velocity * massMomentum = 0 m/s * 4000kg
Momentum = 0 kg m/s
The symbol for momentum is a small p.
The momentum is defined as the product of mass and the velocity of the body. The momentum of the truck will be zero.
What is momentum?The momentum is defined as the product of mass and the velocity of the body. It is denoted by the letter p. It occurs due to the applied force. Its unit is Kg m/s².
The given data in the problem is;
v is the velocity of truck = not given
m is the mass of truck=4000 Kg
p is the momentum of the truck=?
We can not calculate the momentum of the body at rest. Because the momentum of the body at the rest will be zero.
Hence the momentum of the truck will be zero.
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Cars A, B, C, D, and E are moving on tracks from left to right. The lengths of the tracks are the same. Assuming each car started at the beginning of its track, which cars are moving at a constant velocity?
A) A and C
B) B and D
C) C and E
D) D and A
Answer A
Cars A, B, C, D, and E are moving on tracks from left to right. The lengths of the tracks are the same. Assuming each car started at the beginning of its track, which cars are moving at a constant velocity?
A) A and C
B) B and D
C) C and E
D) D and A
The cars A and C are moving with a constant velocity. The correct option is A.
The diagram attached, is a motion diagram, which marks the positions of an object measured at equal time intervals by means of dots.
If the dots are evenly spaced, it shows that the object is making equal displacements in equal intervals of time, which means that the object has a constant velocity.
In the attached diagram, it can be seen that the dots for the cars A and C are equally spaced, showing that these cars are moving with a constant velocity.
The cars B and D are accelerating, since the space between the dots appears to increase.
The car E is decelerating, as the distance between the dots progressively decreases.
Hence only the cars A and C are moving with constant velocities, with A having a greater velocity than C.
A timeline is necessary a. For every goal c. For every life goal b. For every academic goal d. For every high school goal please select the best answer from the choices provided a b c d
A timeline is necessary a. For every goal.
Here are a few reasons why it is so:
Provides Structure: A timeline gives structure to your plan by breaking it down into manageable steps and defining the sequence in which tasks need to be accomplished.Prioritizes Tasks: With a timeline, you can prioritize different tasks and activities to focus on what is most important at a given time.Tracks Progress: It allows you to monitor your progress towards your goal, so you know whether you are on track or need to make adjustments.Enhances Motivation: Knowing the deadlines can boost your motivation to achieve the goal within the set timeframe.Avoids Procrastination: Timelines help reduce procrastination by setting clear deadlines and creating a sense of urgency to complete tasks.In summary, a timeline is beneficial for every goal as it provides a clear path, helps track progress, and keeps you motivated to achieve your objectives.A shopping cart rolls from x=19.9m to x=5.40m with an average velocity of -0.418m/s. How much time did it take? (unit=s)
Given
initial position = Xi= 19.9m
Final position Xf = 5.4m
Average velocity= Va = -0.418m/s
it shows displacement is reverse.
To find t=?
As Va = (Xf- Xi) / t
t = (Xf-Xi) / ( Va)
t = ( 5.4-19.9) / (-0.418)
t = (-14.5 ) / (-0.418) (-ve sign cancel out at numerator and denominator)
t =34.69 s
Van finds a metamorphic rock as he is exploring a small ravine near his house. Metamorphic rock is a type of rock that has gone through a change that has turned it into a different type of rock. Which processes can cause rocks to change to metamorphic rock?
breaking
crushing
deposition
heat and pressure
heat and pressure would be your answer hope it helps
Answer:
heat and pressure
Explanation:
Which government agency is responsible for protecting the nation’s transportation systems to ensure freedom of movement for passengers and commerce? A. Environmental Protection Agency B. Federal Communications Commission C. Occupational Safety and Health Administration D. Transportation Security Administration
economics high school level.
The correct answer is D. Transportation Security Administration.
-Willow I know U might not bealive me but I am Correct.
And here Is my Proof. They are an agency that organizes numerous things that are related to transportation security. Among other things, they regulate things such as quality of roads or railroads, or they participate in establishing safety standards for various types of vehicles, from cars to boats and airplanes and trucks, and they do various other things.
Answer:
D.
Explanation:
Match the following vocabulary words with their definitions.
1. the decay of organic matter caused by microorganisms putrefaction
2. susceptible to decomposition by living organisms. refuse
3. waste biodegradable
Answer: (1) Putrefaction
(2) Biodegradable
(3) Refuse.
Putrefaction refers to decomposition of organic substances usually dead plants' and animals' bodies by microorganisms.
Therefore, it matches with first definition that states the decay of organic matter caused by microorganisms.
Biodegradable substances are decomposed by living organisms such as microorganisms.
Therefore, it matches with the second definition that states susceptible to decomposition by living organisms.
Refuse refers to something which is no longer useful.
Therefore, it matches with the third definition of waste.
Final answer:
The vocabulary words 'putrefaction', 'biodegradable', and 'refuse' are matched with their definitions related to decomposition and waste, with putrefaction being the decay of organic matter by microorganisms, biodegradable indicating that a substance can decompose by living organisms, and refuse meaning waste.
Explanation:
When matching the vocabulary words with their definitions, we relate terms to their respective meanings concerning the breakdown of organic material and waste management. Here are the correct matches:
Putrefaction is the decay of organic matter caused by microorganisms.Biodegradable refers to substances that are susceptible to decomposition by living organisms, such as decomposers.Refuse is synonymous with waste, which refers to materials that are discarded or rejected.Decomposers, like bacteria and fungi, are vital because they break down dead organisms and wastes, transforming complex organic materials into simpler inorganic nutrients that can be reused by producers in the ecosystem. If a substance can be broken down by decomposers, it is termed biodegradable. Organic matter undergoes putrefaction as a result of microbial action, highlighting the role of decomposers in the natural recycling process.
Ions are atoms of the same element that have gained or lost _____.
A: protons
B: nucleons
C: neutrons
D:Nuclei
E: electrons
OH. I just answered this question yesterday too! E: electrons
Why by Mimiwhatsup: When a atom gains or loses an electron, it will attain a net charge and become an ion.
hey again :)
answer: neutrons
why?: neutrons have a negative charge with a mass of - 1 amu. but trust me it's C.
hope this helps! ❤ from peachimin
What is the maximum speed with which a 1200-kg car can round a turn of radius 88.0 m on a flat road if the coefficient of static friction between tires and road is 0.40?
Answer:
18.6 m/s
Explanation:
The frictional force acting on the car is given by:
[tex]F_f = \mu m g=(0.40 )(1200 kg)(9.81 m/s^2)=4709 N[/tex]
But the frictional force also corresponds to the centripetal force that keeps the car in circular motion in the turn:
[tex]F_f = F_c = m \frac{v^2}{r}[/tex]
Where v is the maximum speed the car can achieve remaining in the turn. Substituting r=88.0 m and re-arranging the formula, we can find the value of v:
[tex]v=\sqrt{\frac{Fr}{m}}=\sqrt{\frac{(4709 N)(88.0 m)}{1200 kg}}=18.6 m/s[/tex]
The maximum speed a 1200kg car can round a turn of radius 88m on a flat road given a friction coefficient of 0.40, is around 18.7m/s. This considers the principles of centripetal force and static friction with the assumption of an ideal case scenario.
Explanation:This problem is a physics scenario that involves centripetal force and static friction. The maximum speed can be calculated using the formula for the centripetal force (F), which in this case is provided by the static friction: F = μN, where μ is the friction coefficient and N is the normal force. In a situation where a car is rounding a turn on a flat road, the normal force N equals to the weight of the car, which is mass (m) times gravity (g). Thus, the equation F = μmg can be used to solve for the centripetal force. The centripetal force equation on the other hand is F = mv² / r, where m is the mass of the car, v is the speed of the car, and r is the radius of the turn. Equating these two equations gives μmg = mv² / r. The mass cancels out resulting to v = sqrt(μgr). Substituting the given values results to maximum speed, v, which is around 18.7 m/s.
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Visible electrical discharge from a storm cloud is called?
id have to say its thunder
Which vector should be negative?
Question 1 options:
any vector whose magnitude is less than 1
a displacement in the direction North
the velocity of a falling object
any vector whose magnitude is greater than 1
Answer:
The velocity of a falling object
Explanation:
The positive X axis is towards right and positive Y axis is towards up, so North direction is positive
A vector with less than 1 magnitude is not negative, because its magnitude may be in between 0 and 1 which is positive vector.
Any vector whose magnitude is greater than 1 is never be a negative vector.
The velocity of a falling object is towards bottom, that is towards negative Y axis. So that vector is negative.
Wildlife biologists are attempting to monitor the population size of the insect pest known as the gypsy moth (Lymantria dispar) during the summer months. To estimate the total population size of these insects living in a 50 square kilometer forest, biologists have sampled random trees, counting the number of eggs and larvae on each randomly selected tree. Which of these factors MOST directly impacts the accuracy of this estimate?
A)
the number of trees sampled
B)
the presence of gypsy moth predators
C)
the overall health of the gypsy moth population
D)
the weather conditions at the time of the sampling
Answer: Option A: The number of trees sampled.
The accuracy can be understood as how close is the measured value to the true value. The aim is to monitor the population size of the insect pest in a 50 square kilometer. Random trees are selected, and number of eggs and larvae are counted. So, the measured value would be closer to actual value when the number of trees sampled are increased. More the number of trees sampled, less would be the chances of error and the accuracy of the estimate would increase.
Answer:
a.) the number of tress sampled
How far will a brick starting from rest fall freely in 3 seconds
When object falls freely we can say
its initial speed will be ZERO
and its acceleration due to gravity must be
[tex]a = g = 9.8 m/s^2[/tex]
Now we need to find the distance of free fall in 3 s of time
So here we will use kinematics
[tex]y = v* t + \frac{1}{2} at^2[/tex]
now we will plug in all values in it
[tex]y = 0 + \frac{1}{2}* 9.8 * 3^2[/tex]
[tex]y = 44.1 m[/tex]
So it will fall by total distance of 44.1 m
Answer:
The brick will cover a distance of [tex]44.1\;\rm{m[/tex].
Explanation:
Given: A brick starting from rest fall freely in 3 seconds.
As mentioned in question,
When an object falls freely then its initial speed will be [tex](u)=0\; \rm{m/s[/tex].
Acceleration due to gravity is [tex]a=g=9.8\;\rm{m/s^{-2[/tex].
Time [tex](t)=3\; \rm{seconds[/tex]
Using the laws of motion: [tex]s=ut+\frac{1}{2}at^2[/tex]
Substiuting all the values we get:
[tex]s=0\times3+\frac{1}{2}\times9.8\times3^2\\s=0.5\times9.8\times 9\\s=44.1\;\rm{m[/tex]
Therefore, the brick will cover a distance of [tex]44.1\;\rm{m[/tex].
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Use Einstein’s energy equation to solve the following problem. Recall that the speed of light is 3 x 108 m/s. If a 5.0-kg stone is completely converted to energy, what is its energy equivalent in joules?
E =mc²
= (5.0-kg)(3 x 10^8 m/s)²
= (5.0-kg) (9×10^16m²/s²)
E =4.5×10^17 J
Answer:
Its energy equivalent in Joules is
E = 4.5 × 10^17Joules
Explanation:
The Einstein energy equation is expressed as shown
E = mc² where:
m is the mass of the stone
c is the speed of light
Given:
m = 5.0kg
c = 3 x 10^8 m/s
E = 5×(3 x 10^8)²
E = 5×(9×10^16)
E = 45 × 10^16
E = 4.5 × 10^17Joules
hurry plz
Heart is to the ________ system as lungs are to the _________ system
respiratory; endocrine
nervous; endocrine
endocrine; muscular
circulatory; respiratory
Which of the following could be compared to soldiers?
Question 3 options:
white blood cells
Your heart
red blood cells
Your lungs
Which system is responsible for the transportation of blood throughout the system?
Question 4 options:
respiratory system
circulatory system
endocrine system
digestive system
A balloon is floating freely at a rate of 0.87 m/s due south. A southerly breeze (coming from the south) blows against the balloon with a velocity of 0.32 m/s. What is the velocity of the balloon and the direction it is traveling? Ans- Velocity=
Direction =
Velocity = 1.32
Direction = South
Answer:
Velocity = 0.55 m/s
Direction = South
Explanation:
Given
let us take the south as positive direction
Velocity of the balloon [tex]v_{b}[/tex] = + 0.87 m/s
Velocity of wind [tex]v_{w}[/tex] = - 0.32 m/s
Solution
Resultant velocity
[tex]v = v_{b} + v_{w} \\\\v = 0.87+(-0.32)\\\\v = 0.55 m/s[/tex]
since the resultant velocity is positive, balloon is directed southward
a pool ball leaves a 0.60 meter high table with an initial high table with an initial horizontal velocity of 2.4m/s. predict the time required for the pool ball to fall to the ground and the horizontal distance between the tables edge and the balls landing location
Ball leaves the table of height 0.60 m
Initial speed of the ball is in horizontal direction which is 2.4 m/s
Now here we can say that time taken by the ball to hit the ground will be given by kinematics equation in vertical direction
[tex]\Delta y = v_y*t + \frac{1}{2}at^2[/tex]
here in y direction we can say
[tex]\Delta y = 0.60 m[/tex]
[tex]v_y = 0[/tex]
[tex]a = 9.8 m/s^2[/tex] due to gravity
now from above equation we have
[tex]0.60 = 0 + \frac{1}{2}*9.8*t^2[/tex]
[tex]t = 0.35 s[/tex]
Now in the same time the distance that ball move in horizontal direction is given as
[tex]d = v_x* t[/tex]
given that
[tex]v_x = 2.4 m/s[/tex]
[tex]d = 2.4 * 0.35[/tex]
[tex]d = 0.84 m[/tex]
So it will move a total distance of 0.84 m where it will land
The time required for the pool ball to hit the ground is approximately 0.35 seconds and it would cover a horizontal distance of about 0.84 meters from the edge of the table to the landing location.
Explanation:Your question involves the physics concept of projectile motion. Here, we can use the concepts of horizontal velocity and vertical displacement to calculate the time it would take the pool ball to hit the ground and the horizontal distance it would cover.
Firstly, solving for the fall time, we use the equation of motion: h = 0.5gt², where h is the height, g is the gravity constant (9.8 m/s²), and t is the time. Given the height h = 0.60m, we find t≈0.35s.
Secondly, to find the horizontal distance (the distance between the table's edge and the ball's landing location), we use the formula d = vt, where d is distance, v is horizontal velocity, and t is time. So, d ≈ 2.4m/s * 0.35s = 0.84m.
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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
Mr. Harden's class decides to perform an experiment to determine how long it takes different objects to hit the floor when dropped from a desk. The class dropped three balls from a desk, one weighing 2 pounds, one weighing 4 pounds, and one weighing six pounds. It took them all the same amount of time to hit the floor. After evaluating these results, you predict that a 10 pound ball will take
A) more time to hit the floor.
B) less time to hit the floor.
C) about the same amount of time to hit the floor.
D) an unknown amount of time before hitting the floor.
EXAM PLEASE HELP 98 POINTS! An 8.0 cm object is 40.0 cm from a concave mirror that has a focal length of 10.0 cm. Its image is 16.0 cm in front of the mirror.
The height of the image produced by the mirror, to the nearest tenth, is
cm.
(NOT 9.6)
Answer:
3.2
Explanation:
Select the correct answer.
An object has one force acting on it. It is a 33-newton force pointing downward. To create a net force of zero on the object, which force must be applied to it?
A.
a 33-newton force pointing upward
B.
a 1-newton force pointing upward
C.
a 33-newton force pointing left
D.
a 0-newton force pointing downward
E.
a 1-newton force pointing right
Answer:
A) 33-newton force pointing upward
Explanation:
Hope this help!
Match the equivalent temperatures.
1. 60.°C 473 degrees K
2. 300.K 333 degrees K
3. 373K 27 degrees C
4. 200.°C 212 degrees F
The conversions are as follows
60.°C = 333 Kelvin
212 F = 373 K
200 C = 273 K
27 C = 300 K
This question involves matching temperatures in differing scales: degrees Celsius, Kelvin, and Fahrenheit. However, only the first match (60°C to 333K) can be made with the given options. The remaining options don't correspond correctly.
Explanation:The question involves converting and matching different temperature scales, namely degrees Celsius (°C), Kelvin (K), and degrees Fahrenheit (°F). Here are the matched equivalent temperatures:
The question involves converting and matching different temperature scales, namely degrees Celsius (°C), Kelvin (K), and degrees Fahrenheit (°F). Here are the matched equivalent temperatures:
60°C is equivalent to 333K.300K does not have a match in the given options.373K is equivalent to 100°C (but there is no 100 degrees Celsius in the options).200°C is equivalent to 392°F (but there is no 392 degrees Fahrenheit in the options).Please note, the conversions work as follows:From Celsius to Kelvin, you add 273.15.From Kelvin to Celsius, you subtract 273.15.To convert Celsius to Fahrenheit, use the formula (°C * 9/5) + 32.To convert Fahrenheit to Celsius, use the formula (°F - 32) * 5/9.To learn more about Temperature Conversion:
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The diagram shows a charge moving into an electric field.
The charge will most likely leave the electric field near which letter?
A) W
B) X
C) Y
D) Z
The charge will most likely leave the electric field near C) Y
Answer:
Option (C)
Explanation:
The direction of electric field is upwards
The charge is negative is nature, so the force on the charge particle is in the opposite direction of electric field that means the force on the charged particle is downward. The relation between the force and the electric field is given by
F = -q x E
So, the charged particle experience a force in the downward direction and then leaves the electric filed near point Y.
What is the value of a charge that has an electric potential of 325 V and an electric potential energy of 0.025 J?
A)7.7 × 10^-4 C
B)7.7 × 10^-5 C
C)1.3 × 10^3 C
D)1.3 × 10^4 C
B) 7.7 x 10^-5 c, hope it helps
Answer:
Choice B is the answer
Explanation:
which statement is True ?
A. A resistor alters current , and a switch turns current on & off
B. A resistor measures voltage and a switch changes AC to DC or DC to AC
C. A resistor alters current and a switch measures voltage
D. A resistor changes AC to DC or DC to AC and a switch turns current on & off
Answer:yess the correct answer is A
Explanation:
Whats the formula for distance if i have time, acceleration and speed
If time (t), acceleration(a) and initial velocity (Vi) is given distance can be find by
S = (Vi)t + (1/2) at²
If both velocities initial velocity an final velocity is given then formula will be
2aS = (Vf)²- (Vi²)
Where S is the distance.
how hard is it to cut through steel with a plastic knife
Hey there!
You cannot cut through steel with a plastic knife. As fun as it sounds, it is not a good idea to try, and 99.9% of the time it would not work.
Hope this helps!
It is impossible to cut through steel with a plastic knife because steel is much harder than plastic, and trying to do so could lead to injury.
Steel is a very hard material that requires special tools to cut through effectively due to its high hardness level. Plastic knives are not capable of cutting through steel because they are not hard or sharp enough to overcome the material's resistance. Therefore, It is virtually impossible to cut through steel with a plastic knife due to the significant difference in hardness between the two materials. The hardness of a material dictates how resistant it is to being scratched or cut. For example, steel used in a pocketknife blade has a hardness value of around 5.5, which is considered sufficient to separate between hard and soft minerals. On the other hand, plastics used for items such as plastic cutting boards or plastic knives are much softer.
The table shows the charges and the distance between five different pairs of objects.
If the force between two charges, q, separated by a distance, d, is F, what is the list of the other forces, from greatest to least?
A) Y, Z, W, X
B) Y, W, X, Z
C) Z, Y, W, X
D) Z, X, W, Y
B. Y,W,X,Z is the answer, Hope it helps
Answer : Y > W > X > Z
Explanation :
The electrostatic force is given by :
[tex]F=k\dfrac{q_1q_2}{d^2}[/tex]
k is the electrostatic constant
q₁ and q₂ are charges
d is the distance between them
We will calculate forces one by one :
[tex]F=k\dfrac{q.q}{d^2}=\dfrac{kq^2}{d^2}[/tex]
[tex]W=k\dfrac{q.2q}{d^2}=\dfrac{2kq^2}{d^2}=2F[/tex]
[tex]X=k\dfrac{q.q}{(2d)^2}=\dfrac{kq^2}{4d^2}=\dfrac{F}{4}[/tex]
[tex]Y=k\dfrac{3q.q}{d^2}=\dfrac{3kq^2}{d^2}=3F[/tex]
[tex]Z=k\dfrac{q.q}{(3d)^2}=\dfrac{kq^2}{9d^2}=\dfrac{F}{9}[/tex]
So, the force from greatest to least will be :
Y > W > X > Z
So, the correct option is (B)
Which of the following would be an example of basic research?
A) Spencer's research on WWII radar technology that led to the invention of the microwave oven.
B) Experimenting to determine the fundamental properties of x-rays.
C) Edison's research and use of other scientists' work to invent the light bulb.
D) Morrison and Franscioni's research done to create the Frisbee.
Experimenting to determine the fundamental properties of x-rays would be an example of basic research. The experimental primary analysis tries to determine the laws of the events. The primary analysis is expected to know the stuff, its sort, its characteristics and its performance. It examines to get the speculation. To obtain wherewith the stuff performance yet not how to practice these forms for a firm determination.
The research of the characteristics of the particle to explain whatever it is, how it combines with other atoms, how it determines the characteristics of the material are some instances of primary analysis. For example examining to ascertain the basic features of x-rays. Spencer's research on WWII radar technology that drove to the discovery of the microwave furnace.
Edison's research and application of other scientists task is to create the light bulb, and Morrison and Franscioni's research was made to build the Frisbee models of applied research science.
Basic research is driven by scientific curiosity, with the aim to enhance the understanding of fundamental principles. In the given choices, B) Experimenting to determine the fundamental properties of x-rays is an example of basic research, as it is looking to better understand these electromagnetic waves.
Explanation:Basic research, also known as fundamental research or pure research, is designed to extend the knowledge base without a specific application in mind. It is driven by curiosity or interest in a scientific question. The aim is to increase understanding of fundamental principles and has the potential to lead to new inventions or technologies. In the given choices, an example of basic research would be B) Experimenting to determine the fundamental properties of x-rays. This study seeks basic understanding about the nature and properties of these electromagnetic waves, which is the very essence of basic research.
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A free falling object has the velocity time graph shown. What is the objects displacement between 0.0 and 6.0s
For free fall motion the displacement can be found by graphically as well as by kinematics equation
Here acceleration of object is constant as it fall due to gravity so we can use
[tex]d = v_i * t + \frac{1}{2}at^2[/tex]
here if body starts with zero initial speed then we can say
[tex]d = 0 + \frac{1}{2}*9.8*t^2[/tex]
here we need to find the displacement from t = 0 to t = 6s
so we can say
[tex]d = \frac{1}{2}*9.8*6^2[/tex]
[tex]d = 176.4 m[/tex]
so the displacement will be 176.4 m
in order to find the displacement from the graph of velocity and time we need to find the area under the graph for given time interval that will also give us same displacement for given period of time.
Answer:
+360m
Explanation:
You are missing some parts of the question but I have found them else where. The graph will be shown below.
The formula for this is [ d = vt ] where v = velocity and t = time.
On the graph, we can see that the acceleration is constant. The line goes to a maximum velocity of 60m/s and a maximum time of 6 seconds.
Find the displacement with what we are given.
d = 60 * 6
d = 360m
Since we are going forward, we are going to add a "+" sign in front.
Best of Luck!
The unit of electric current is the _____.
A) volt
B) ohm
C) ampere
D) faraday
C
the unit of electric current is the ampere, often shortened to amp
Which of these would have particles with the highest kinetic energy? Ice Water Water Vapor
The correct answer is water vapor.
Explanation:In evaporation of water, particles with high kinetic energy tend to leave the water surface. Because high kinetic energy molecules move faster than others breaking bonds with other molecules. And escape the water to air in form of vapors.While the ice water contain molecules with low kinetic energy.Answer: Water Vapor
Explanation:
Kinetic energy is the energy possessed by an object by virtue of its motion.
Solid state : In this state, the molecules are arranged in regular and repeating pattern. The molecules are closely packed that means they are fixed and have low kinetic energy.
For example : Ice
Liquid state : In this state, the molecules are present in random and irregular pattern. The molecules are closely packed but they can move from one place to another and hence have low kinetic energy.
For example : water
Gaseous state : In this state, the molecules are present in irregular pattern. The molecules are not closely packed and they can move freely from one place to another and spread out and thus have high kinetic energy.
For example : water vapor