According to the statement:
a) speed is equal to 118 km/h in kilometres per hour.
b) yes it is exceeding 90km/h.
What does speed mean?The pace at which an object's position changes in any direction is referred to as speed. Speed is defined as the ratio of something like the distance traversed to the time required to cover that distance. . . Speed is a scalar quantity since it just has a direction and no magnitude..
How are the speeds determined?Speed is determined by dividing the distance by the time. Calculating the units for speed requires knowledge of the units for both time and distance.. The units in this example will be meters per second (m/s), since the distance is measured in meters (m) and the time is measured in seconds (s).
(a)s₂= 118.km/h is its speed in kilometres per hour.
1h = 3600s
1km = 1000m
s₂= (33m/s) *[tex]\left(\frac{60 \times 60}{1000}\right)[/tex]
= 118.8km/h
s₂= 118.km/h
(b) yes it is exceeding 90km/h.
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A baseball is thrown at a velocity of 98.4 miles per hour. what is the speed in m/s?
A baseball is thrown at a velocity of 98.4 miles per hour. The speed in m/s is approximately 43.73 m/s.
The velocity or speed means the amount of distance we have travelled per unit time.
The speed given is 98.4 miles/hour
V = 98.4 miles/hour
Since, 1 miles = 1.6 km = 1600 m
1 hour = 3600 s
So the speed in metre per second is:
V = [tex]\frac{98.4 \times 1600}{3600} m/s[/tex]
[tex]\approx 43.73 \ m/s[/tex]
Hence, the speed in m/s is approximately 43.73 m/s.
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8 m N & 5 m 30° N of E
Draw and add the vectors.
The Pythagorean theorem can be used to find the resultant, which has a magnitude of 15.6 kilometers. The answer is displayed beneath the diagram.
A resultant vector that is directed both north and east can be created by adding together two displacement vectors with magnitude and direction of 11 km north and 11 km east. The hypotenuse of a right triangle is the result of adding the two vectors' head to tail as shown below. The right triangle's sides are 11 km and 11 km long. Scaled vector diagrams are frequently used to represent vector quantities. An arrow drawn to scale and pointing in a particular direction is used in vector diagrams to represent a vector.
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An inert atmosphere was obtained by adding nitrogen in a room that measures and has a 8.00 ft ceiling. how many liters of nitrogen were used to fill the room?
An inert atmosphere was obtained by adding nitrogen in a room that measures 11.0 ft x 11.0 ft and has a 8.00 ft ceiling. The number of liters of nitrogen that were used to fill the room is : (D) 2.74 x 104 Liters.
The number of liters of nitrogen that were used to fill the room
= Volume of room in cm3 x 1 Liters / 103 cm3
Volume of room in cm3 = 11.0 ft x (30.48 cm / 1 ft) x 11.0 ft x (30.48 cm / 1 ft) x 8.00 ft x (30.48 cm / 1 ft)
= 27410707.501 cm3 or 2.741 x 107 cm3
And since 1 Litres = 103 cm3
Volume of room in cm3 = 2.74 x 107 cm3
Now putting these values in the above equation we get
So, the number of liters of nitrogen that were used to fill the room
= Volume of room in cm3 x 1 Liters / 103 cm3
= 2.74 x 107 cm3 x 1 Liters / 103 cm3
= 2.741 x 104 Liters
Thus, an inert atmosphere was obtained by adding nitrogen in a room that measures 11.0 ft x 11.0 ft and has a 8.00 ft ceiling. The number of liters of nitrogen that were used to fill the room is 2.74 x 104 Liters.
The conference room of a hotel measures 40 ft by 50 ft has a 12-foot ceiling what is the area of the wallsThe area of the walls is 2 ,160 ft ²
we know that,
The area of the walls is = perimeter of the conference room * the height of the ceiling
So,
A = 2 (40 + 50 ) (12)
A = 2 , 160ft²
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The potential at points a and b are: va = -2 v and vb = 6 v. when a 5 c charge is moved from a to b, the change in potential energy of this system is:__________
This system's potential energy changed by 40 J.
Energy = charge * potential difference
=> Energy = (8v)*5
=> Energy = 40 J
Hence the answer is 40 J.
What is potential difference?Potential difference, often known as voltage, is equal to the amount of current times the resistance. One Joule, or one Volt, of energy is required for one Coulomb of charge to flow from one place in a circuit to the another.
What is the formula for the potential difference?V=U q, The change in the potential energy of a charge q transported from point A to point B, divided by the charge, is what is used to determine the electric potential difference between points A and B, or VBVA. The joules per coulomb unit of the potential difference is called the volt (V).
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If the outside air temperature increases during a flight at constant power and at a constant indicated altitude, the true airspeed will:__________
The true airspeed will increase and true altitude will increase.
What is true air speed?True airspeed is the airspeed of an aircraft relative to undisturbed air.
It's the aircraft speed relative to the airmass in which it's flying.
How does outside air temperature affect air speed?If the outside air temperature increases during a flight at constant power and at a constant indicated altitude, the true airspeed will increase and true altitude will increase.
Thus, the true airspeed will increase and true altitude will increase.
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If two insulated wires were to melt together where the copper conductors touched each other, the type of failure would be called a(n) ________.
A short to voltage failure would occur if the copper conductors of two insulated wires came into contact and melted together.
Describe voltage:The difference in electric potential between two points, also known as voltage, electric potential difference, electric pressure, or electric tension, is measured as the amount of work required to move a test charge per unit of energy between the two sites.
What is voltage formula?The formula reads voltage = current x resistance, or V = A x, or volts = amps x ohms.
What different voltages are there?Electrical services are categorized:
Low Voltage: 1000 volts or less.Medium Voltage is defined as much over 1000 volts and under 100 kV.High Voltage is defined as voltages of at least 100 kV but not more than 230 kV.Ultra-High Voltage is defined as 1000 kV or more.To know more about Voltage visit:
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A father and his young daughter are ice skating. they face each other at rest and push each other, moving in opposite directions. which one has the greater final speed? group of answer choices
A father and his young daughter are ice skating. According to it, the daughter has greater speed.
The law of action and response is Newton’s third principle.According to Newton’s third law, when two bodies come into contact, they exert forces on one another that are equal in size and directed in the opposite direction. The law of action and reaction is another name for the third law.
This law applies to bodies in uniform or rapid motion and is crucial for addressing problems of static equilibrium, where all forces are in balance. The forces it discusses are actual phenomena, not just accounting tricks.
If there is a net force operating on a body, it moves faster in line with the second rule.
If there is no net force acting on the body, either because there are no forces at all or because all forces are precisely balanced by opposing forces, the body does not accelerate and is said to be in equilibrium.
On the other hand, it can be assumed that a body that appears to be moving slowly has no net force acting on it.
So going according to it, the daughter has greater speed.
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Consider the reaction, 2 d(g) 3 e(g) f(g) => 2 g(g) h(g) when d is decreasing at 0.69 mol/ls, how quickly is f decreasing? give your answer to 3 decimal places.
The compound f is increasing at the rate of 0.46 mol per second.
The number of moles of a compound is defined as the mass of the compound divided by its molecular mass. The SI unit of the number of moles is mol. The number of moles is represented by the symbol 'n'.
[tex]Number \: of \: moles = \frac{ Mass}{ Molecular \: mass}[/tex]
[tex]n = \frac{m}{M} [/tex]
The balanced equation for the reaction is,
2 d (g) + 3 e (g) + f (g) => 2 g (g) + h (g)
In the reaction, 3 moles of compound e are consumed to give 2 moles of compound g.
For 1 mole of compound e consumed to form =
[tex] \frac{2}{3} \: moles \: of \: g \: formed.[/tex]
The compound e is decreasing at the of = 0.69 mol/s
So, the rate at which g is increasing is,
[tex] = \frac{2}{3} \times 0.69[/tex]
[tex]= 0.46 \: mol/ s[/tex]
Therefore, compound f is increasing at the rate of 0.46 mol per second.
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If a football quarterback can throw the ball at 20.0 m/s, what is the furthest distance the quarterback could throw the ball neglecting air resistance?
The furthest distance the quarterback could throw the ball neglecting air resistance is 81.63 meters.
The situation given above is an example of projectile motion.
The maximum distance up to which a projectile can be thrown is known as its range, which is given by the formula,
Range(R) = 2u^2 sin(2θ)/g
Here u is the maximum velocity of the projectile= 20 m/s
θ is the angle at which the projectile is launched = 45°
g is the acceleration due to gravity = 9.8 m/s^2
Putting the above values in the given equation,
The range comes out to be 81.63 meters.
Hence, the furthest distance the quarterback could throw the ball neglecting air resistance is 81.63 meters.
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an open electrical circuit as a result of a failed circuit breaker is considered to be what type of failure system?
Answer:
Fail-close
Explanation:
A failed open switch is a switching device (be it mechanical, relay, semiconductor) that has lost it's switching capabilities (it's defective) and the switched contacts are now constantly open (disconnected) regardless of the control signal to the switch.
Similarly a failed closed switch is the same just with the contacts connected through.
How many moles of disulfur decafluoride are present in 3.46 grams of this compound?
Moles of disulfur decafluoride are present in 3.46 grams of this compound is 0.025 mol
There are 6.022 x 10^23 S2F10 units in one mole
There are 6.022 x 10^23 S2F10 units in one mole of the stuff by definition.
And thus 1.55 x 10^22 molecules/6.022 x 10^23 molecules mol^-1 =~ 0.025 mol
S2F10 is nasty stuff, though apparently it is quite odourless (this is a "good" property in a war gas, because some punter might get a lethal dose of it before he realizes he has been gassed; the substance has never been deployed in war).
What are moles ?A mole can be defined as the amount of substance that contains the same number of chemical entities (atoms, ions, molecules, etc.) as there are in 12 g of Carbon-12 isotope, as defined by the General Conference on Weights and Measures.
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I need help with #25 PLEASEEEE!!
I DONT UNDERSTAND
Sabrina is studying exercise physiology. What is MOST likely to be the
main focus of her studies?
O how bodies react when muscles are put to use
O how skeletal bones affect exercise form and posture
O how the lungs and heart respond to aerobic workouts
how anaerobic workouts boost metabolism
According to the research, the correct option is how the lungs and heart respond to aerobic workouts. It is most likely to be the main focus of her studies of exercise physiology.
What is exercise physiology?It is the medical specialty that includes the study and understanding of physical activity as a physiological stimulus and its repercussions on each of the organs of the human body, their behavior and responses.
In this sense, during physical activity or exercise, cardiovascular physiological adaptations occur that improve physical performance since all the body's systems are automatically activated and in tune.
Therefore, we can conclude that according to the research, the correct option is how the lungs and heart respond to aerobic workouts. It is most likely to be the main focus of her studies of exercise physiology.
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If earth receives half as much light per unit area per unit time from star a compared to star b, what is the apparent visual magnitude difference between the stars?
The apparent visual magnitude difference between the Star A is higher.
What does apparent visual magnitude measure?A star's apparent magnitude, or m, indicates how brilliant the star appears when it is far away from Earth. The scale is logarithmic and "backwards." Stars with larger magnitudes are also fainter stars. Be aware that brightness is another word for the flux of light that is coming at us and is measured in Watts per square meter.
The brightness of a star or other celestial object as seen from Earth is expressed in terms of apparent magnitude. The apparent magnitude of an object is determined by its inherent luminosity, its distance from Earth, and any light extinction brought on by interstellar dust in the path of the observer's line of sight.
The brightness of a star or other celestial object perceived from Earth is measured in apparent magnitude (m). The apparent magnitude of an object is determined by its inherent luminosity, its distance from Earth, and any light extinction brought on by interstellar dust in the path of the observer's line of sight.
The apparent visual magnitude difference between the Star A is higher.
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If you use the approximate nonrelativistic equation for the magnitude of momentum of the proton, what answer do you get?
The answer is 4.96 * 10⁻¹⁹ kg m / s
Proton is an elementary particle that is identical to the nucleus of the hydrogen atom, along with the neutron is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron, and has a mass of 1.673 × 10−27 kilogram
nonrelativistic equation for the magnitude of the momentum of the proton is p = m * v
Then: p = m * v
Then Let's calculate its value
After that p = 1.67 * 10⁻²⁷ * 0.99 * 3 * 10⁸
Now, p = 4.96 * 10⁻¹⁹ kg m / s
hence the answer is 4.96 * 10⁻¹⁹ kg m / s
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What would happen to the predominant protonation state and charge of the his and asp side chains if the ph were to change from 7.40 to 5.00?
The predominant protonation state and charge of the His and Asp side chain will be predominantly protonated and positively charged if both its p[tex]K_{a}[/tex] values is more than 5.
We know that,
pH = p[tex]K_{a}[/tex] + ( log [ [tex]A^{-1}[/tex] ] / [ HA ] )
where,
[ [tex]A^{-1}[/tex] ] represents deprotonated form
[ HA ] represents protonated form
Consider pH = p[tex]K_{a}[/tex]
In this case,
[ [tex]A^{-1}[/tex] ] / [ HA ] = 1
This means that protonated and deprotonated forms are equal.
This also means that as pH decreases, the acid's state will be predominantly protonated and its charge will be positive.
The relationship between pH and p[tex]K_{a}[/tex] shown above is known as Henderson-Hasselbach equation
Therefore, the predominant protonation state and charge of the His and Asp side chain will be predominantly protonated and positively charged if both its p[tex]K_{a}[/tex] values is more than 5.
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Determine whether the underlined numerical value is a parameter or a statistic. explain your reasoning. a certain zoo
Parameter, because the data set of all 843 animals in a zoo is a population.
The population of all animals in the Zoo is 843
Proportion = 8%, which is the ratio regarding the population. So 8% is populaton proporiton, i..e Parameter .
What is a zoo?A zoo, short for the zoological garden, is a place where animals are kept in enclosures, cared for, presented to the public, and occasionally bred for conservation efforts. The phrase zoological garden refers to zoology, the study of animals. It is also used to refer to an animal park or menagerie. In the United States alone, over 181 million people visit zoos every year. The goal of the modern zoo, which first appeared in the 19th century in the United Kingdom was to entertain and inspire the public by offering scientific inquiry and later educational exhibits. The London Zoological Gardens, which was opened to the public in 1847 after being opened for scientific study in 1828, is where the abbreviation "zoo" first appeared.
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Write down the names of three mar-made devices in everyday use that depend,
for their action, upon the moments of forces.
Answer:
Scissors
Tap
Spanner
Explanation:
A race car is moving at 40.0 m/s around a circular racetrack of radius 265 m. calculate the period of the motion.
The race car that is moving at 40.0 m/s around a circular racetrack of radius 265 m has a period of motion of 41.63 s
To solve this tangential velocity problem the formula and the procedure we will use is:
v = (2 * π * r) / T
Where:
v = tangential velocityπ = mathematical constantr = radiusT = periodInformation about the problem:
v = 40.0 m/sπ = 3.1416r = 265 mT=?Applying the tangential velocity formula and isolating the period, we get:
v = (2 * π * r)/ T
T = (2 * π * r)/ v
T = (2 * 3.1416* 265 m) / 40.0 m/s
T = (1665.04 m) / 40.0 m/s
T = 41.63 s
What is tangential velocity?In physics is the length of arc traveled in each unit of time in uniform circular motion. It is expressed in units of distance per time (m/s), (km/h).
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A labrador retriever runs 50.0 meters in 7.20 seconds to retrieve a bird. the dog then runs half way back in 3.85 seconds. determine the average speed of the dog and the average velocity of the dog
The average speed of the dog is 6.8 m/s while the average velocity is 6.8 m/s halfway to the starting point.
Speed and velocityThe speed of a moving object is the ratio of the distance covered by the object and the time taken to cover the distance. The average speed is the ratio of the total distance traveled and the total time taken.
Velocity, on the other hand, refers to the speed in a particular direction. In other words, velocity is a vector quantity while speed is a scalar quantity.
In this case:
Total distance covered = 50 + 25
= 75 meters
Total time taken = 7.2 + 3.85
= 11.05 seconds
Average speed = 75/11.05
= 6.8 m/s
Average velocity = 6.8 m/s halfway
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what is sine wave or sinusoidal wave? write the general form of sine wave and define each term. requency and speed of this wave.
sine wave or sinusoidal wave -
sine wave can be described as a geometric waveform that oscillates periodically.
It retains its wave shape when added to the another sine wave of the same frequency.
It is a continuous wave.
the general form of sine wave is
y = asin(bx)
where
a is amplitudeamplitude is the maximum displacement from its mean position to extreme position.
b is periodicityPeriodicity is a repeating continuous pattern which determine its wavelength and frequency.
Frequency of sine wave.
1kHz that is sine wave goes through thousand complete cycle in one second.
Speed of sine wave.
Speed = frequency x wavelength
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In a first order decomposition, the constant is 0.00586 sec-1. what percentage of the compound is left after 3.32 minutes?
The correct answer for percentage of the compound is left after 3.32 minutes is 55 % .
We use the formula A(t) = A0e-kt for decomposition, where A0 is the initial amount of decomposed substance at t = 0, k is the decay constant, t is the time elapsed, and A(t) is the amount after time t.
The percentage of decomposed compound left after a time t is, [A(t)], divided the the initial amount, [A0], time 100, or A/A0*100:
A = A0e-kt
A/A0 = e^- 0.00586t, [k = 0.00299, divide both sides by A0]
A/Ao = e^(-0.00299*199), [t = 3.32 min*(60 sec/ 1 min) =199 sec]
A/A0 = . 0.551= 55%, (* 100, rounded)
The Arrhenius equation is k = Ae(-Ea/kT), where A is the frequency or pre-exponential factor and e(-Ea/RT) is the fraction of collisions at temperature T that have enough energy to overcome the activation barrier (i.e., have energy greater than or equal to the activation energy Ea).
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set up the experiment as follows:
1. make a small hole in the cardboard. it should be 4 inch from one edge and centered.
2. pull the string or thread through the hole in the cardboard, and tie the ends together to form a loop.
3. slide a large paperclip onto the string, and bend one end out slightly to act as a hook.
4. place a nonbreakable object, such as a kitchen utensil, on the cardboard.
5. select two nonbreakable objects with holes that can be hung on the hook.
what two objects will you select to hang on the hook?
The two objects that I would select to hang on the hook are scissors and stainless-steel cup.
The concept of Balanced ForcesForce symmetry
Balanced forces are those that have opposing directions and equal sizes. One definition of equilibrium is a state of balanced forces.
When the forces are in balance, there is no change in direction.
The sum of balanced forces is always zero. Merging vectors
The momentum or direction of an object cannot be changed by balance forces.
A balanced force keeps an object moving at a steady speed. (Newton’s First Law of Motion)
The Concept of unbalanced forcesAsymmetry of forces
Forces that are not equal in size and differ in direction, always set something moving. (Can alter an object’s direction or speed)
The combined force is equal to the difference between two unbalanced forces acting in opposing directions.
The combined force is equal to the sum of the two unbalanced forces acting in the same direction.
The net force is equal to the resultant when the forces are at right angles.
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Answer:
Explanation:
The two objects that I would select to hang on the hook are scissors and stainless-steel cup.
The concept of Balanced Forces
Force symmetry
Balanced forces are those that have opposing directions and equal sizes. One definition of equilibrium is a state of balanced forces.
When the forces are in balance, there is no change in direction.
The sum of balanced forces is always zero. Merging vectors
The momentum or direction of an object cannot be changed by balance forces.
A balanced force keeps an object moving at a steady speed. (Newton’s First Law of Motion)
The Concept of unbalanced forces
Asymmetry of forces
Forces that are not equal in size and differ in direction, always set something moving. (Can alter an object’s direction or speed)
The combined force is equal to the difference between two unbalanced forces acting in opposing directions.
The combined force is equal to the sum of the two unbalanced forces acting in the same direction.
The net force is equal to the resultant when the forces are at right angles.
what is sound and how does it move through different mediums?
The temperature at which an alligator's egg is incubated will determine the sex of the offspring. the dependent and the independent variables in this experiment are ________.
The infant alligator's sex is the dependent variable in this experiment, and temperature is the independent variable.
By dependent and independent variables, what do you mean?The independent and dependent variables are the two main factors in an experiment. In a scientific experiment, an independent variable is a variable that is altered or controlled to see how it affects the dependent variable. In a scientific experiment, the variable under test and being measured is known as the dependent variable. Example: Your test score is influenced by how much you sleep (an independent variable) (dependent variable). One of the most crucial aspects of scientific study is establishing cause and effect relationships. Knowing which variable is the cause, or independent variable, and which is the effect, or dependent variable, is crucial.
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The layers in a high-mass star occur in order of:________
a. atomic abundance.
b. fusion temperature.
c. atomic number.
d. spin state.
A high-mass star has layers that are arranged in order of b. Temperature for fusion.
What is the temperature of fusion?The temperature at which a substance transforms from a solid to a liquid is known as its melting point. The solid and liquid phases are in equilibrium at the melting point. Pressure affects a substance's melting point, which is typically reported at a standard pressure such 1 atmosphere or 100 kPa. There are two main categories of fusion reactions: those that maintain the ratio of protons to neutrons and those that convert protons to neutrons. The solid-liquid and liquid-to-gas transitions are connected with the typical heats of fusion and vaporization, respectively, for each substance.
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If the car maintains its constant acceleration, how much additional time does it take the car to reach a velocity of 35.0 m/sm/s ? express your answer in seconds.
5 seconds is the additional time.
Describe acceleration using an example.It is possible for an object's velocity to alter by increasing, decreasing, or changing its direction of motion. A few instances of acceleration include an apple falling to the ground, the moon orbiting the earth, and a car coming to a stop at a set of traffic lights.How is acceleration measured?A metre per second (m/s2) is used to measure acceleration. The newton is the unit of force responsible for producing an acceleration of one meter per second per second when applied to a mass of one kilogram.learn more about acceleration here
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What is the displacement if Susan walked 25km west to the store and 25km back home
A boy sledding down a hill accelerates at 1.25 m/s2. if he started from rest, in what distance would he reach a speed of 5.30 m/s?
By uniform motion, the distance traveled is 11.24 meters.
We need to know about the uniform motion to solve this problem. The uniform motion is the motion of an object which has acceleration applied. It can be determined as
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time interval and s is displacement.
From the question above, we know that:
a = 1.25 m/s²
vo = 0 m/s
vt = 5.3 m/s
By using the second equation, we can calculate the distance
vt² = vo² + 2a . s
5.3² = 0² + 2 . 1.25 . s
2.5s = 28.09
s = 11.24 m
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What is displacement?
A an action exerted on a body in order to change the body's state of rest or motion
B the distance traveled divided by the time interval during which the motion occurred
the change in position of an object
Dan object's change in position relative to a reference point
Displacement is the change in position of an object. Displacement is a vector quantity.
As for the given options, option (a) is the definition of Force. Option (b) is the definition of velocity. Option (d) is the definition of motion. Displacement is the shortest distance between initial point and final point whereas distance is the total distance covered from initial point to final point.
Since displacement is a measure of length, its unit is usually meter. It is denoted as Δx. The formula for calculating displacement is Δx = [tex]x_{2}[/tex] - [tex]x_{1}[/tex], where [tex]x_{2}[/tex] is the final position and [tex]x_{1}[/tex] is the initial position.
Therefore, Displacement is the change in position of an object.
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