The presentation layer is sometimes known as the syntax layer since it is in charge of ensuring that the data it either receives or transmits to other layers has the correct syntax. Data sent across the network is formatted and encrypted by the presentation layer.
What is meant by the presentation layer?The presentation layer, which is layer 6 in the seven-layer OSI model of computer networking, acts as a network's data translator. It is referred to as the syntactic layer at times.
The communication is given to the top layer in a defined format thanks to the presentation layer (Layer 6). It deals with the messages' syntax and meaning. Communication across disparate systems, encrypts messages from the user-dependent format to the common format and vice versa.
The presentation layer, which is located at Layer 6 of the Open Systems Interconnection (OSI) communications architecture, makes sure that all communications passing through it are in the right format for the destination application. In other words, from the application layer's point of view, it provides the data in a comprehensible format.
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If you subtract vector 3.7 cm at 45° North of East from vector 4.5 cm at 57° West of North using a scale drawing, what is the resultant vector?
The resultant vector is 5.2 cm at a direction of 12⁰ west of north.
Resultant of the two vectors
The resultant of the two vectors is calculated as follows;
R = a² + b² - 2ab cos(θ)
where;
θ is the angle between the two vectors = 45° + (90 - 57) = 78⁰a is the first vectorb is the second vectorR² = (3.7)² + (4.5)² - (2 x 3.7 x 4.5) cos(78)
R² = 27.02
R = 5.2 cm
Direction of the vectorθ = 90 - 78⁰
θ = 12⁰
Thus, the resultant vector is 5.2 cm at a direction of 12⁰ west of north.
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What is the statement domain for p1? express as line numbers. exclude syntactical markers, such as {, }, else, and end.
The statement domain for p1 will constitute for all those line sequences which can possibly be executed depending upon the inputted value of A. It can be stated as follows:
{ (1,2,3), (1,2,3,5,8,16,17), (1,2,3,5,6,13,16,17)}
In addition to the examination of the total study population, the DOMAIN statement also asks analysis of domains (subpopulations).
The variables that distinguish domains are known as domain variables and are named by the DOMAIN statement.
Both character and numeric domain variables are acceptable. Domain variables are treated as categorical variables by the technique.
Each level of a variable determines a domain in the research population if it appears in a DOMAIN statement by itself.
A domain is determined by every possible combination of levels of variables when two or more variables are connected by an asterisk (*). Within each of the domains that are established by the domain variables, the process does a descriptive analysis.
The levels of the categorical variables are based on the formatted values of the domain variables.
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Find an equation of the sphere with center s23, 2, 5d and radius 4. what is the intersection of this sphere with the yz-plane? stewart, james. calculus (page 837). cengage learning. kindle edition.
As a result, the provided sphere's intersection with the yz-plane would be (y-2)²+(z-5)²=7.
What do you mean by intersection?When two streets or lines cross, it is known as an intersection. The two places where crossings are most likely to occur are in math class and in traffic. An intersection in mathematics is the place where two lines converge. This is the common theme among the lines.
Briefing:Equation (x+3)²+(y-2)²+(z-5)²=16
Intersection (y-2)²+(z-5)²=7
We are asked to write an equation of the sphere with center (-3,2,5) and radius 4.
We know that equation of a sphere with radius 'r' and center (h,k,l) at is in form:
(x-h)²+(y-k)²+(z-l)²=r²
Since center of the given sphere is at point (-3,2,5) , so we will substitute h=-3,k=2 ,l=5 and r=4 in above equation as:
(x-(-3))²+(y-2)²+(z-5)²=4²
(x+3)²+(y-2)²+(z-5)²=16
Therefore, our required equation would be (x+3)²+(y-2)²+(z-5)²=16
To find the intersection of our sphere with the yz-plane, we will substitute x=0 in our equation as
(0+3)²+(y-2)²+(z-5)²=16
9+(y-2)²+(z-5)²=16
9-9+(y-2)²+(z-5)²=16-9
(y-2)²+(z-5)²=7
As a result, the provided sphere's intersection with the yz-plane would be:
(y-2)²+(z-5)²=7.
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The position of an object that is oscillating on a spring is given by the equation x = (17.4 cm) cos[(5.46 s-1)t]. what is the angular frequency for this motion?
the angular frequency of this motion is 5.46rad /sec
The formula for the angular frequency is = 2π/T. Radians per second are used to express angular frequency. The frequency, f = 1/T, is the period's inverse. The motion's frequency, f = 1/T = ω/2π, determines how many complete oscillations occur in a given amount of time so in this case the It is measured in units of Hertz, (1 Hz = 1/s).
herex
=
(17.4cm)cos[(5.46s− 1)t]
is written in the general form
where we can identify: A=17.4cm and ω
=5.46rad /sec
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A block has a mass of 4.726 g and a volume of 128.9 cm3. calculate the density in g/cm3
The density of the block is 0.036 g / [tex]cm^{3}[/tex]
We know that,
Density = Mass / Volume
Given that,
Mass = 4.726 g
Volume = 128.3 [tex]cm^{3}[/tex]
Density = 4.726 / 128.3 = 0.036 g / [tex]cm^{3}[/tex]
Density is defined as the unit mass per unit volume. It is represented using ρ.
Therefore, the density of the block is 0.036 g / [tex]cm^{3}[/tex]
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A car covers a distance of 200m. If its velocity is 20 m/s², calculate the time taken.
A car whose mass is 1600 kg (including the driver) has a maximum acceleration of 1.2 m/s^2. if three 80-kg passengers are also in the car, its maximum acceleration will be?
With the same force applied, the acceleration of car with three passengers is 1.04 m/s².
We need to know about force to solve this problem. According to second Newton's Law, the force applied to an object will be proportional to mass and acceleration. Hence, it can be written as
F = m . a
where F is force, m is mass and a is acceleration
From the question above, we know that
mcar = 1600 kg
a0 = 1.2 m/s²
mpassenger = 80 x 3 kg = 240 kg
As we know that the force of car is the same whether there are passengers or no. Hence, we can write
F = F
mcar . a0 = mtotal . a
1600 . 1.2 = (1600 + 240) . a
1920 = 1840a
a = 1.04 m/s²
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Was fired for ________ after it was determined he had been inflating his production reports each quarter.
Was fired for Workplace cheating after it was determined he had been inflating his production reports each quarter.
What are production reports?The document that is filled out each day during the production of a movie or television show to recap what happened that day is known in the film industry as a "production report" (abbreviated "PR"). Each show often uses a unique template for a production report, which is frequently made before production even starts by one of the assistant directors. There is no standard format for a production report ("AD"). Apart from minor variations, most forms include the same data and are basically a collection of blank Excel tables that are printed double-sided on a legal-sized (8 x 14 inch) piece of paper. This form is used to keep track of a production's progress and costs as well as to calculate the cast and crew's respective salaries.
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A light-rail commuter train accelerates at a rate of 1.35 m/s2. how long (in s) does it take to reach its top speed of 80.0 km/h, starting from rest?
It takes 16.5 seconds to reach its top speed of 80.0 km/h, starting from rest.
What is Kinematics?A branch of physics called kinematics, which was evolved from classical mechanics, defines how points, bodies, and systems of bodies (groups of objects) move without taking into account the forces that propel them. The discipline of kinematics is sometimes thought of as a subfield of mathematics and is frequently referred to as the "geometry of motion." Any known values of the location, velocity, and/or acceleration of points inside the system are declared as initial conditions for a kinematics issue, together with the geometry of the system. The position, velocity, and acceleration of any unidentified system components can then be calculated using geometrical considerations.
Where [tex]v[/tex] is the final velocity and [tex]v_{0}[/tex] is the initial velocity, we utilize the formula [tex]v = v_{0}+at[/tex] (because the train starts from rest), [tex]a= 1.35\frac{m}{s^{2} }[/tex], [tex]v_{0} = 80.0\frac{km}{h} = 22.22\frac{m}{s}[/tex]
Injecting these into the formula above and calculating t provides us with,
[tex]t= \frac{v-v_{0} }{a}[/tex] ≈ [tex]16.5 s[/tex]
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Given only a mass number, one can deduce the number of ________ in each atom of an element.
Given only a mass number, one can deduce the number of protons plus neutrons in each atom of an element and is denoted as option A.
What is Mass number?This is also referred to as the nucleon number which is the total number of protons and neutrons in the atom of an element.
Protons are referred to as the positively charged subatomic particles which are present in a atom while the neutrons are subatomic particles which are neutral and the both of them make up the nucleus of an atom.
This is therefore the reason why proton plus neutron was chosen as the most appropriate choice.
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The options are:
a) protons plus neutrons
b) neutrons
c) protons
d) electrons
e) protons plus electrons
Can scientific laws be changed by a vote
Answer:
No.
Explanation:
A sceintific law cannot be changed or modified. It has been proved multiple times.
Answer:
No.
Explanation:
Scientific laws can only be changed if proven wrong. Scientists don't vote on knowledge, they use evidence to prove or disprove theories and laws.
A certain hydrogen spectral line has wavelength 1875 nm when measured in the laboratory. that same line, when measured in a star, has wavelength 1872 nm. what can we say about the star?
The star having wavelength 1872nm is moving toward the earth.
It happens due to the phenomena of Doppler shift. Doppler effect, commonly known as Doppler shift and it is defined as The change is the wavelength or frequency of waves as a result of an observer's motion In relation to the web source.
In visible light it is possible to see the apparent wavelength emitted by stars and galaxies. As a result, a start moving towards the earth appears to emit light with a the short wavelength.
Then the light shows that is static. It is known as blue shift because here spectrum is shifted towards the blue end due to the shortest wavelength.
And when a start goes away from us, it appears that it shifts It's light towards longer wavelength.
This end is referred as redshift because it is closer to the red end of the spectrum.
Add the spectrum of a particular star. Shown that the line appearing at the shortest wavelength is 1872nm in comparison to the laboratory measurement. This shows the same hydrogen line at a greater wavelength 1875.nm results that star is moving towards the Earth.
The star having wavelength 1872nm is moving toward the earth.
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The heat death of the universe is a theoretical time in the future when the universe is supposed to?
The heat death of the universe is a theoretical time in the future when the universe is supposed to use up the entire supply of entropy.
What is the heat death of the universe entropy?According to the theory of the heat death of the universe, which is also known as the Big Chill or Big Freeze, the cosmos will eventually reach a condition where there is no thermodynamic free energy and won't be able to support processes that increase entropy. As entropy rises, matter and energy continue to dissipate until our universe is infinitely chaotic, at which point events come to a halt since entropy can no longer rise. This is referred to as the universe's heat death. Some claim that nothing happens since things can't get any worse.Learn more about the heat death with the help of the given link:
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If an automobile gets 24.5 miles to the gallon and the cost of gasoline is $2.75 a gallon, how much will it cost to drive 975 km?
It will cost $68 to travel 975 kilometers for an automobile if the cost of gasoline is $2.75 per gallon.
This simple calculation can be explained as below calculation of the cost of driving such a distance is done by conversion of the distance into miles and multiplying such distance by $2.75.
Cost of DrivingFirst calculate the kilometers to miles.
975 kilometers is converted as 605.837 miles. Now the division of mileage of automobile will be calculated as,
Gasoline required = Distance travelled/ mileage
=605.837/24.5
=24.72 gallons of gasoline required.
Now we have to calculate the cost of gasoline.
Gasoline cost= gallons x cost per gallon
= 24.72 x 2.75
=$68
So, it is calculated that the cost of gasoline/ cost of driving is $68.0.
Hence, it would cost $68 to travel 975 kilometers for an automobile when the cost of gasoline is $2.75 per gallon.
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11 short response to the following questions "Physics has made our lives comfortable." Justify this statement
Physics has made our lives comfortable because without physics there would be no modern life.
In the modern days before the invention of physics, the life was not as comfortable as today's world. Some basic examples, include controlling the living conditions. In colder days, you can warm yourself using a heater and in hotter days you can cool yourself using an air conditioner.
Physics along with other branches of science led the invention of all the equipment, gadgets, electric devices etc. These inventions makes life easier and comfortable.
Therefore, Physics has made our lives comfortable.
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How many protons, neutrons, and electrons are there, respectively, in an atom of o-17?.
In an atom of O-17, proton and electron is 8, and neutrons is 9.
The atomic number, sometimes referred to as nuclear charge number, of a chemical element is the charge number of an atomic nucleus. For conventional nuclei, this is comparable to the proton number, or the number of protons found in the nucleus of each atom of that element.The atomic number of oxygen is 8. Therefore, an atom needs 8 protons in order to be referred to as an oxygen atom. For instance, an atom will no longer be oxygen if it has 9 protons and will now be fluorine. Any atom that lacks 8 protons is not an oxygen atom. For an atom to be neutrally charged, the number of protons and electrons within it must match. Therefore, there should be 8 electrons in all. However, depending on the isotope, the neutron count can change. An oxygen isotope is a distinct variety of oxygen. For instance, oxygen-15, which has 7 neutrons, is a possibility. The neutron count for oxygen-16 would be 8, for oxygen-17 it would be 9, and so on.Learn more about the quantum mechanics with the help of the given link:
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if tou were to become a scientist what will be your contribution to the society? why?
A 2 meter tall vertical stack of firewood casts a 4 meter shadow on horizontal ground. what is the angle of the sun in the horizon?
The angle of the sun in the horizon would be [tex]\theta[/tex] = 26.56°
CalculationHeight of stack of firewood = 2 m
Height of the shadow of firewood = 4m
Then according to trigonometric identities,
tan[tex]\theta\\[/tex] = 2/4
[tex]\theta[/tex] = [tex]tan^{-1}[/tex](1\2)
[tex]\theta[/tex] = 26.56°
What is trigonometry?
The area of mathematics concerned with how triangles' sides and angles relate to one another as well as with the pertinent uses of any angle is called as Trigonometry. This field of study was created in the Hellenistic era in the third century BC as a result of the use of geometry in astronomical research.
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A pitcher throws a baseball at 43.4 m/s. when the baseball hits the catcher's mitt, it comes to rest over a distance of 0.1 meters. the average acceleration of the baseball was___m/s^2?
The average acceleration of the baseball is 9417.8 m/s².
To find the average acceleration, the given values are,
Initial velocity = 0
Final velocity = 43.4 m/s
Distance = 0.1 meters.
What is Acceleration?Acceleration is a rate of change of velocity with respect to time with respect to direction and speed.A point or an object moving in a straight line is accelerated if it speeds up or slows down.Acceleration is a vector quantity but it has both magnitude and direction.Acceleration formula can be written as,
Acceleration, a = (v - u ) / t m/s²
where, a - acceleration
v - Final velocity
u - Initial velocity
T - Time
Acceleration can be found by,
v² = v₀² + 2a ( x - x₀)
Rearranging the equation,
43.4² = 0 + 2a ( 0.1 m)
1883.56 = 0.2 a
a = 1883.56 / 0.2
a = 9417.8 m/s².
The acceleration of the baseball is 9417.8 m/s².
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Chebyshev's theorem states that the proportion of values is at least 1-1/k2. what is the meaning of k?
k is the number of standard deviations greater than one that that proportion of observations will be discovered within.
What does Standard Deviation mean?A standard deviation measures the spread of data in relation to the mean.
A low standard deviation suggests that the data is concentrated around the mean, whereas a high standard deviation shows that the data is spread.
A standard deviation near 0 suggests that data points are close to the mean, whereas a high or low standard deviation indicates that data points are above or below the mean, respectively.
The curve on top of Image 7 is more spread out and hence has a higher standard deviation, whereas the curve below is more grouped around the mean and thus has a smaller standard deviation.
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Ph=4.390 write the henderson-hasselbalch equation for a propanoic acid solution (ch3ch2co2h, pka=4.874). 4.390
Answer:
a) [A⁻]/[HA] = 0.227b) [A⁻]/[HA] = 0.991c) [A⁻]/[HA] = 2.667Explanation:In the Henderson-Hasselbalch equation, HA stands from an acid an A⁻ stands from its conjugate base, as follows:CH₃CH₂CO₂H = HACH₃CH₂CO₂⁻ = A⁻pH = pka + Log [A⁻]/[HA]pH = 4.874 + Log[CH₃CH₂CO₂⁻]/[CH₃CH₂CO₂H](a) 4.23 = 4.874 + Log [A⁻]/[HA]-0.644 = Log [A⁻]/[HA] = [A⁻]/[HA]0.227 = [A⁻]/[HA](b) 4.87 = 4.874 + Log [A⁻]/[HA]-0.004 = Log [A⁻]/[HA] = [A⁻]/[HA]0.991 = [A⁻]/[HA](c) 5.30 = 4.874 + Log [A⁻]/[HA]0.426 = Log [A⁻]/[HA] = [A⁻]/[HA]2.667 = [A⁻]/[HA]
Explanation:
If your bathroom scale assesses your weight to be 98, 211, and 167 pounds on successive measurements in the same day, the scale would suffer from low _____ reliability.
The scale that would suffer from low Test-Retest reliability when the bathroom scale assesses on measurements in the same day.
How is reliability determined ?Producing a large number of evaluation-focused questions and randomly dividing them into two sets of questions is the most popular method for gauging the dependability of parallel forms. You determine the correlation between the findings after the same respondents respond to both sets of questions.
A measure's reliability is its constancy. Internal consistency, consistency among things, and consistency across different researchers are the three types of consistency that psychologists take into account (inter-rater reliability).
Because it affects the worth of a psychological test or study, reliability is crucial. Its dependability assures value to the psychology field and other fields where it has importance, such as business or education, if test findings are consistent when researchers undertake a study.
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A 0.5kg baseball experiences a 10n force for a duration of 0.1s. what is the change in?
The change in velocity is 2m/s
Given ,
mass of baseball m = 0.5kg
force on baseball F = 10 N
Duration .i.e. time t = 0.1s
To find here change in velocity =?
Solution,
The impulse(J) of an object is equal to,
J = F× T
Where J is the impulse of the baseball and F is force on baseball at time t.
The impulse is equal to the change in momentum of the baseball and its unit is (N.s) Newton -second. it is a vector quantity therefore the dimension is [LMT⁻¹]. Then the impulse j is given as ,
J = m(v-u)
Here J is impulse ,m is mass, (v-u) is change in velocity .From equating the both impulse equations then can be write as,
m(v-u) = F× t
(v -u) =( F × t)/m
(v -u) = (10N× 0.1 s)/0.5k
(v -u) = 2m/s
Hence the change in velocity (v -u) of baseball is 2m/s.
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Driving at a speed so fast that a driver cannot stop within the distance he/she can see with the use of headlights is called:________
Driving at a speed so fast that a driver cannot stop within the distance he/she can see with the use of headlights is called ___Overdriving headlights____
What is Overdriving headlights ?When a driver's sight is compromised by fog or darkness yet they continue to drive at a pace that prevents them from being able to stop in time to avoid objects in the road, it is sometimes referred to as "overdriving your headlights."
The best option when driving in rain, snow, or fog is to use your low beam headlights. Your high beams will just reflect back off the fog when it's foggy, making it even harder to see in front of you. Ideal conditions, such a clear day on dry roads, are where speed limits are posted.Using your headlights too much means. You cannot halt in the glow of your headlights in the distance. Drivers should proceed with caution if an approaching car's lights blind them. Examine the right.Learn more about Overdriving headlight here:
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What two principal factors affect the force of air resistance on a falling object?.
The two principal factors that affect the force of air resistance on a falling object are speed and cross-sectional area of the object.
When an object falls through the air, it mostly encounters some sort of resistance to its speed and this resistance is known as air resistance.
This resistance is present because of the collisions of the air molecules with the frontal surface molecules of the object.
As the speed is increased of the object so that increased amount of air resistance. speed of the object is directly proportional to the air resistance.
The cross-section of solid is defined as the shape obtained by the intersection of solid by a plane .
The rate of change of distance with respect to time is known as speed.
S = (dx/dt)
Where, dx is the distance and dt is change in time .
So that, more the speed, more the air resistance and so in the case with the cross-sectional area.
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The intensity of sunlight at the Earth's distance from the Sun is 1370 W/m². Assume the Earth absorbs all the sunlight incident upon it. (b) Explain how this force compares with the Sun's gravitational attraction
Comparing these two values, Fgav is much greater than Fr.
First, calculate the force produced by the radiation pressure:
The radiation pressure produces a force equal to,
Fr=pr(πRe2)
=(I/c) ( πRe2)
Given that
I= Intensity of sun = 1370 W/m²
c = speed of light = 2.998×108m/s
Re = Radius of the earth= 6.37×106m
Ms= mass of sun = 2.0×1030kg
Me= mass of earth = 5.98×1024kg
des2 = distance of earth and sun apart =1.5×1011m
Substituting the given values according to the question
Fr= π (1.37 × 103 kW/m2) (6.37×106m)2/2.998×108m/s
=6.0×108N
(b) The gravitational pull of the Sun on the Earth is,
Fgav= GMsMe/ des2
putting values according to question
Fgav= (6.67×10−11 N⋅m2/kg2) (2.0×1030kg) (5.98×1024kg) / (1.5×1011m)2
=3.6×1022N.
Comparing these two values, it is obvious that Fgav is much greater than Fr.
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Light can show us that an object is rotating when one side is moving toward us and one side is moving away using:_____.
Light can show us that an object is rotating when one side is moving toward us and one side is moving away using rotational Doppler effect.
Doppler effect in light is the change in frequency of light observed by the observer due to relative motion of source in relation with the observer.
When the source of light moves towards the observer frequency increases and the wavelength decreases causing a blue shift. But when the source of light moves away from the observer frequency decreases and the wavelength increases causing a red shift.
Therefore, light can show us that an object is rotating when one side is moving toward us and one side is moving away using rotational Doppler effect.
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In a large perfectly quiet room, at what maximum distance could you hear a bee with a power output of 1 nw ? recall that the threshold of hearing is 10−12w/m2
Using threshold intensity, the maximum distance the sound could hear a bee is 8.92 m.
We need to know about intensity to solve this problem. Intensity can be determined as the ratio of power to the area. The magnitude of intensity can be calculated by
I = P / (4πr²)
where I is intensity, P is power and r is distance.
From the question above, we know that
P = 1 nW = 10¯⁹ W
I = 10¯¹² W/m²
By substituting the given parameters, we get
I = P / (4πr²)
10¯¹² = 10¯⁹ / (4πr²)
r² = 79.55
r = √79.55
r = 8.92 m
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The velocity of a ball is 1 m/s at a given instant of time. is it possible for the acceleration of the ball to be -1 at this instant
Yes, The velocity of a ball is 1 m/s at a given instant of time. it is possible for the acceleration of the ball to be -1 at this instant.
Why can the acceleration be in negative?If it is made sure that the other values are plugged in correctly, a positive velocity is capable of making a negative acceleration.
Does negative acceleration indicate a speed reduction?A moving item always experiences positive acceleration. An object that is slowing down always experiences negative acceleration. However it does not mean that negative acceleration always mean reduction in speed.
Deceleration always slows down motion. However, negative acceleration is just acceleration in the opposite direction according to the selected coordinate system. Negative acceleration might or might not be deceleration, and vice versa for negative acceleration.
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During the time that a planet is in its period of apparent retrograde motion, _________.
Answer:
The center of the retrograde motion occurs at the planet's opposition which is when it is exactly opposite the Sun.
Explanation:
