The radius is equal to the Earth’s radius. You can find this information online by computing the Earth’s surface area while assuming that it is a perfect sphere, then multiplying the result by the percentage of the planet that is covered in water.
Actually, you can demonstrate this without knowing the radius.
P/A = e•s•T4
Water has an emissivity, e, of roughly 0.96. And 5.67108 W/m2 K4 is the Stefan-Boltzmann constant.
Stephen Boltzmann lawThe power radiated from a black body is described by the Stefan-Boltzmann law in terms of its temperature. The Stefan-Boltzmann constant, often known as the proportionality constant, is derived from several well-known physical constants.
Where k is the Boltzmann constant, h is the Planck’s constant, and c is the speed of light in a vacuum, the constant has the value since 2019
When compared to a black body, a body that does not completely absorb incident radiation (sometimes referred to as a grey body) emits less total energy.
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Name the four most abundant elements in the entire earth. use their full names instead of their symbols.
Answer: Oxygen, silicon, iron and aluminum
Explanation: Oxygen, which composes about 49.5% of the total mass of the Earth’s crust, waters and atmosphere, according to the textbook “Modern Chemistry.” Silicon is second at 28%. Aluminum is a distant third, at only 8%. Compounds of silicon and oxygen make up 87% of the materials in the Earth’s crust.
as it passes over grand bahama island, the eye of a hurricane is moving in a direction 30◦ north of west with a speed of 55 km/h. three hours later, it shifts due north, and its speed slows to 81 km/h. how far from grand bahama is the eye 4.50 h after it passes over the island? answer in units of km.
Answer:
249 km
Explanation:
and its speed slows to 81 km/h. ??? <===== Isn't slower...
for three hours it travels 55 km/h for 1.5 hours it travels at 81 km/hr
Distance North 3 * 55 sin 30 + 81 * 1.5 km = 204 km
Distance West 3 * 55 cos 30 = 142.9 km
Use pythag theorem to find displacement
d^2 = 204^2 + 142.9 ^2 shows d = 249 km
Almotorcycle has a maximum acceleration of 3 m/s2 in either direction and a maximum
speed of 25 m/s. How long does it take for the motoreycle to reach someone who is 1 km away?
Answer:
44.2 seconds
Explanation:
to accelerate to 25 m/s will take 25/3 = 8.33 sec
and cover d = 1/2 a t^2 = 104.1 m
this leaves 1000 - 104.1 = 895.92 meters to cover at 25 m/s
= 35.84 seconds added to the original 8.33 second required to get up to ax speed = 44.2 seconds
According to newton's second law, if you double the force acting on a body, the acceleration will double.
a. true
b. false
It is the true statement, that if we double the force acting on a body, the acceleration will double.
What is acceleration?In terms of both speed and direction, acceleration is the rate at which velocity varies over time. Acceleration refers to the change in speed or direction of an item or point travelling straight forward. Due to the constant change in direction, motion on a circle accelerates even while the speed is constant. Both impacts help to accelerate all other types of motion.
In order to be a vector quantity, acceleration must have both a magnitude and a direction. As a vector quantity, velocity is also. A time interval's velocity vector change divided by that interval's duration is the definition of acceleration.
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Five particles are shot from the left into a region that contains a uniform electric field. The numbered lines show the paths taken by the five particles. A negatively charged particle with a charge –3q follows path 2 while it moves through this field. Do not consider any effects due to gravity. In which direction does the electric field point?.
An electric field that has a constant field strength value throughout is said to be uniform. Since the field strength is constant and the field lines are generally parallel and evenly spaced from one another in a uniform electric field. Their separation is equal.
What is an electric field point?Each point in space has an electric field associated with it when there is a charge present in any form. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the strength and direction of the electric field.
What is meant by a uniform electric field?An electric field that has a constant field strength value throughout is said to be uniform. Since the field strength is constant and the field lines are generally parallel and evenly spaced from one another in a uniform electric field. Their separation is equal.
Therefore, the correct answer is option D) toward the bottom of the page.
The complete question is:
In which direction does the electric field point?
A) toward the top of the page
B) toward the left of the page
C) toward the right of the page
D) toward the bottom of the page
E) out of the page, toward the reader
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Why must the nurse check the flow rate after changing the gown of a patient who is receiving intravenous fluids infused by gravity?
The nurse will check the flow rate of the infusion after a gown change because handling the intravenous tubing and container can disrupt the flow rate.
What is intravenous fluids ?Intravenous fluids, sometimes abbreviated as "IV fluids," are liquids that are administered to replace water, sugar, and salt that you may need if you're ill or having surgery and are unable to eat or drink regularly. Through a drip, IV fluids are administered directly into a vein.
Examples include D5W, which is dextrose (sugar) in water, and normal saline, which is salt in water. Lactated Ringer's is another illustration, which includes salt, chloride, potassium, calcium, and lactate. It is employed for forceful fluid replacement.Learn more about Intravenous fluid here:
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Name the units for each electrical quantity. a. potential difference (electrical pressure) _____ b. electrical current ______ c. electrical resistance ______
The answer of the question is
(a)Voltage or Volt
(b)Ampere (A)
(c)Ohm
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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A resistor carries 0.40 a when connected to a 9.0-v battery. what is theresistance of the resistor?
The resistance of the resistor which carries 0.40 a when connected to a 9.0-v battery is 22.5 ohm
Given:
current of resistor = 0.40 A
voltage of resistor = 9.0 V
To Find:
the resistance of the resistor
Solution: Resistance of a resistor with current I and voltage V is defined as the ability of the element to resist the flow of current through it. It's SI unit is V/A or ohm. Ohms () are used to express resistance values. Electricity will flow from high to low when two terminals have an electron difference. That flow is countered by resistance. The current decreases as resistance increases. Conversely, the higher the current, the lower the resistance.
Voltage = Current x Resistance
Resistance = Voltage/Current
Resistance = 9 V/0.40 A = 22.5 ohm
Hence, the resistance of the resistor is 22.5 ohm
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If the spectrometer had been set to a different wavelength to measure absorbances (one where the copper would have absorbed more or less light), how would that have changed the results?
If the spectrometer had been set to a different wavelength to measure absorbances (If the spectrometer had been set to a different wavelength to measure absorbances) then the calculated unknown concentration should same.
Absorbance is directly proportional to the concentration of the substance.
higher concentration gives higher absorbance because the light absorbed is affected by the interacted no. of molecules.
Spectrometer - An instrument used to measure wavelength of spectra over a wide range.
types of spectrometer
emission absorptionIf the spectrometer had been set to a different wavelength to measure absorbances (If the spectrometer had been set to a different wavelength to measure absorbances) then the calculated unknown concentration should same.
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The driving force for heat transfer through physical contact between two objects is determined by:_______
The driving force for heat transfer through physical contact between two objects is determined by: The temperature gradient between the objects.
Briefing :Temperature gradient is what drives heat transfer. When it occurs between two things, this process is known as conduction. The rules of thermodynamics state that, without an external force, heat will move from high-temperature systems to low-temperature systems.Temperature is what drives heat transfer or the passage of heat. A state of higher temperature moves heat into a state of lower temperature. The potential difference or voltage between two terminals or electrodes is what generates electricity.For instance, the antifreeze that runs along the cylinder walls of your car's engine conducts heat from the engine by conduction. This stops your car's engine from overheating.Learn more about the Temperature gradient with the help of the given link:
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What sequence of two displacements moves from (5,5) m to (-5,-5) m while traveling a
distance of exactly 20 meters? How does this distance compare to the single displacement that
connects the same starting and ending point?
A distance of 20 m is greater than a single displacement of 14.14 m that connects the same starting and ending point.
What is the displacement of the sequence?
The displacement of the sequence is calculated as follows;
Δx = √[(x₂ - x₁)² + (y₂ - y₁)²]
Δx = √[(-5 - 5)² + (-5 - 5)²]
Δx = 14.14 m
Thus, we can conclude that a distance of 20 m is greater than a single displacement of 14.14 m that connects the same starting and ending point.
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A mechanic working on a 100-m radar tower drops a hammer weighing 44.5 n. the work done on the hammer as it falls is:________
A 44.5 n hammer falls from a 100 m radar tower being repaired by a mechanic 4450 J worth of work is done on the hammer as it falls.
Briefing:Work= Force *Distance
= 44.5*100
= 4450 J.
What Is Distance?Distance is a measurement of the distance between two objects or location. In physics, the term "distance" can refer to an actual length or, more commonly, to an estimate based on several other parameters. The sign |AB| may occasionally be used to denote a distance between two places.
What is the formula for calculating distance?To calculate the distance, use the formula d = st, or distance equal speed multiplied by time.
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The energy driving the global water cycle is provided by:________
a. rotation of the earth on its axis.
b. solar energy.
c. wind.
d. tides.
The energy driving the global water cycle is provided by solar energy.
What is a solar energy?Solar energy is the term for solar radiation, which has the ability to ignite chemical reactions, produce heat, or create electricity. The total solar energy incident on Earth far exceeds both the present and future energy needs of the planet. This highly diffused source might potentially provide all of the energy required in the future if properly harnessed. Due to its limitless supply and lack of environmental impact compared to the finite fossil fuels coal, petroleum, and natural gas, solar energy is predicted to gain popularity as a renewable energy source in the twenty-first century. Although the Sun is a very potent energy source and sunlight is by far the most abundant energy that Earth receives, the intensity of sunlight at the planet's surface is actually rather low.
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Humans convert approximately ________ of the energy stored in food to useful work
Humans convert approximately 40% of the energy stored in food to useful work
Humans can store about 40% of the energy from the food consumed due to the conversion of energy from food through the metabolic process (metabolism).
The other 60% of the energy it is used to maintain the normal function of the body and the other activities that involve physical and mental activities
The energy storage is a reserve of energy that we can use in really difficult situation when the body is with no energy.
What is metabolism?The processes of a chemical or physical nature by which the human body converts or uses energy.
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Help, physics is really hard man
Answer:
23.63985719
Explanation:
pls dont ask it was painfull
In animals, carbohydrates are stored in ______ granules adjacent to the smooth er membrane in liver cells. these release energy upon demand.
As the liver cells of animals, carbohydrates are kept in glycogen granules close to the inner membrane. On demand, these release energy.
Where can you find glycogen ?In addition to human muscle and liver cells, other cells such as those in the brain, heart, smooth muscle, kidney, red and white blood cells, and even adipose tissue also store modest amounts of glycogen.
Glucose is stored in the form of glycogen. It is a sizable, multi-branched polymer of glucose that is converted back into glucose in response to glucagon and accumulates in response to insulin. The fact is that because fat is such an energy-dense molecule and contains so many calories per gram, ounce, or pound, it is far simpler to lose weight when your body burns carbohydrates instead of fat. While a gram of glycogen only contains four calories, a gram of fat has nine calories.
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Find the cost of excavating a space 84 ft long, 42 ft wide, and 9 ft deep at a cost of $39/yd3. (simplify your answer completely.)
The cost of excavating a space of 84 ft long, 42 ft wide, and 9 ft deep is $45864
Information about the problem:
Space long= 84 ftSpace wide= 42 ftSpace deep= 9 ftCost by yard3 = $39/yd3Total cost= ?To solve this problem, we have to state the equation using the information of the problem:
Calculating the volume of the total space:
space volume = space long * space wide * space deep
space volume = 84 ft * 42 ft * 9 ft
space volume = 31752 ft3
By converting the volume from ft3 to yd3, we have:
31752 ft3 * (0,037037 yd3 / 1 ft3) = 1176 yd3
Calculating the cost of excavating the volume space:
Total cost = space volume * cost by yard3
Total cost = 1176 yd3 * $39/yd3
Total cost = $45864
What is volume?It is the space occupied by a body, it is calculated by multiplying its dimensions, for example: length, height and width.
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Find the work done by winding up a hanging cable of length 12 ft and weight density 2 lb/ft. round your answer to two decimal places, if necessary.
The correct answer for the work done by winding up a hanging cable of length 12 ft and weight density 2 lb/ft is 144 ft/lb.
Consider that the entire hanging cable is lifted by 12 feet and there is weight of with weight density 2 pounds per feet .workdone by hanging
W = ∫2x dx from 0 to 12
W =144 ft/lb.
When a force moves something over a distance, work is done. The energy transferred, or work done, can be calculated by multiplying the force by the distance moved in the direction of the force. Work done = force x distance moved in the direction of the force = energy transferred.
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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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Suppose a and b are orthogonal vectors. what is projab? why? give a geometric interpretation in r2 and r3.
A and B are orthogonal vectors, so projab=0 and projab = b
If the vectors a and b are present in, then b is projected onto an as
[tex]proj_{a} b[/tex] = [tex]\frac{a.b}{a^{2} }[/tex]a.
Suppose a and b are orthogonal vectors. Then and
[tex]proj_{a} b[/tex][tex]=\frac{a.b}{a^{2} }=0[/tex]
Suppose a and b are parallel vectors. Then a scaler c exists such that b=cx and
[tex]proj_{a} b=[/tex][tex]=\frac{a.b}{a^{2} }=c\frac{a.b}{a^{2} } a=ca=b[/tex]
[tex]proj_{a} b=0\\proj_{a} b=b[/tex]
What are the orthogonal unit vectors?The term "orthogonal unit vectors" refers to a collection of vectors that are mutually perpendicular to one another, that is, they intersect at an angle of 90° with a magnitude of one unit. Since Cos90 is zero, the dot product of an orthogonal vector is always zero.
Two orthogonal vectors have a zero dot product. The zero dot product of the two column matrices that represent them. It only matters in relation to orientation. In the case of orthogonal vectors, the dot product is zero.
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Which planet in the solar system has not been examined by spacecraft instruments that have either flown by or orbited them?.
You can't get one over on me; spacecraft have traveled to every planet in our solar system.
What does a spacecraft require and how is it created?In addition to science instruments, a spaceship has a number of crucial parts, including an engine, power subsystem, steering system, and communications system. The payload module is where the science instruments are located, while the service module houses the majority of these systems.The most common composite material used for spacecraft structures is graphite-epoxy. Graphite fibers embedded in an epoxy matrix provide the structure its strength and rigidity.More and more space applications are utilizing composite materials made of graphite and epoxy. These materials appeal to engineers because of their potential for a zero or almost zero coefficient of thermal expansion and their advantageous mechanical characteristics of high strength/high stiffness to weight ratio.To learn more about spacecraft, visit:
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Identify a potential source of bias related to the question being asked. suggest a change that would help fix this problem
It is assumed that every adult has a home phone number is the potential source of bias
What is potential source of bias?Systematic variations in how individuals are dropped from the study and how the results are adjusted for them (e.g., incomplete follow-up, differential attrition). bias brought on by an inadequate evaluation of the results. During the course of the study, selection bias can arise from missing data bias.
How may bias' confounding effect be avoided?It is not possible to totally avoid confounding effects. Therefore, every scientist should be aware of all potential causes of bias and take all reasonable steps to minimize and lessen the departure from the truth. Authors should acknowledge any remaining variation in their writing by outlining any recognized constraints on their effort.
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The complete question is: An opinion poll calls 2000 randomly chosen residential telephone numbers then asked to speak with an adult member of the household the interviewer asks box office revenues are at an all-time high how many movies have you watched any theater in the past 12 months and all 1131 people responded the researchers use the responses to estimate the main number of movies adults have watched any movie theater in the past 12 months. What is the potential source of bias in this question
A cook checks the temperature of soup being held for service and it is 130 fahrenheit to cook reheats the suit to 165 this is example of:________
A cook checks the temperature of soup being held for service and it is 130 Fahrenheit to cook reheats the suit to 165 this is example of taking a corrective action.
What is meant by corrective action?
Realizing and characterizing issues, identifying their root causes, and taking the necessary steps to stop them from happening again are all components of corrective action. After that, the Corrective Action Process (CAP) aids in creating, implementing, and verifying the measures done.
Improvements to an organization's procedures are used to get rid of the reasons behind non-conformities or other undesired circumstances.
"Corrective action" refers to a course of action to get rid of the root of a discovered non-conformity or other unwanted circumstance. A nonconformity may have more than one source. In order to avoid repetition, corrective action is taken.
The soup is reheated to 165°F (74°C) when the cook determines that it is 130°F (54°C) when it is being kept for service. This serves as an illustration of corrective action.
A solution that aids in resolving a specific issue is referred to as a rectification action.
In this instance, the cook's corrective intervention aids in keeping the soup fresh.
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The dense atmosphere of venus is ________, causing most incoming solar radiation to be _________.
The dense atmosphere of Venus is light in color, causing most incoming solar radiation to be reflected.
What is the composition of atmosphere of Venus?The atmosphere of Venus is composed of carbon dioxide (CO2, 96,5 %) and nitrogen (N2, less than 3,5%) already represent more than 99,9% of the composition. Water Vapor is present in extremely low quantities, making Venus the driest planet of the solar system.
What is the effect of solar radiation on planet Venus?On Venus, only 10% of the incoming solar radiation reaches the surface; most of it is reflected back into space by the planet's dense cloud cover, making Venus appear to shine brightly in the night sky.
Despite the small amount of solar radiation reaching the surface, it is trapped effectively by gases in lower atmosphere, giving rise to the high temperatures.
Scientists think that the Venus was once more like the Earth, but at some point it started heating up uncontrollably. Any water that may have once existed in oceans on the surface evaporated into atmosphere causing further runaway heating.
It’s like Earth gone wrong with a runaway greenhouse effect that some planetary scientists say should be a warning as to what may become of our home planet if human activities – such as burning fossil fuels and destroying forests, which intensifies natural greenhouse effect – continue.
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A solid block of metal is at its melting temperature. it takes 24j to melt 6kg of a metal. what is the latent heat of fusion of the metal?
The Latent heat of fusion is also known as the Enthalpy of Fusion. It is a kind pf change in enthalpy.
Brief explanation of Latent Heat of Fusion?The latent heat of fusion, is the change in enthalpy that takes place when energy, typically heat, is provided to a specific quantity of a substance to causes it to change from a solid state to a liquid state at a constant pressure.
For instance, 1 kilogram of ice melts at 0 °C at a variety of pressures, absorbing 333.55 kJ of energy without causing a change in temperature.
The heat of solidification, which occurs when a substance changes from a liquid to a solid, is equal and opposing.
This energy includes the contribution necessary to displace its surroundings against ambient pressure in order to accommodate any corresponding change in volume.
The melting point or the freezing point, depending on the situation, is the temperature at which the phase transition takes place. Conventionally, unless otherwise stated, the pressure is taken to be 1 atm (101.325 kPa).
CalculationThe formula of latent heat of fusion is L= q/m
Here q is the heat provided and m is the mass of the object.
So, L = 24j/6kg
L= 4j/kg
So, the latent heat of fusion is 4 j/kg
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F = (-3.4,7.0), where all components are in newtons. what is the magnitude (in newtons) of f?
The all components of force is F = ( -3.4 i + 7 j ) N which has magnitude of | F | = 7.78 N.
We need to know about vectors to solve this problem. Force is included in the vector which has magnitude and direction. Force can be written as
F = Fx i + Fy j
where F is force, Fx is the force component on the x-axis, Fy is the force component on the y-axis.
From the question above, we know that
F = (-3.4 , 7.0)
Hence the force can be written as
F = ( -3.4 i + 7 j )N
The magnitude of this force can be determined as
| F | = √(Fx² + Fy²)
| F | = √((-3.4)² + 7²)
| F | = √(11.56 + 49)
| F | = 7.78 N
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If the vertical initial speed of the ball is 4.5 m/s as the cannon moves horizontally at a speed of 0.70 m/s , how far from the launch point does the ball fall back into the cannon?
The distance of ball from the launch point is
0.92 m
Given:
U = 4.5 m/s = initial speed
V = 0.7 m/s = final speed
g = 10 m/s^2 = acceleration due to gravity
To Find:
distance of ball from the launch point
Solution: The law of motion equation
V^2 - U^2 = 2aS
(0.7)^2 - (4.5)^2 = 2*10*S
0.49 - 18.9 = 20S
- 18.41 / 20 = S
S = - 0.92 m
The distance of ball from the launch point is 0.92 m
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A powerful motorcycle can accelerate from rest to 29.2 m/s in only 3.9 s. What is its average acceleration in meters per second squared?
56 meters have been determined as the distance traveled.
s-displacement, u-initial velocity, v-final velocity, a-acceleration, and t-time variables are equal to v=u + at and v2 = u2 + 2ass, respectively.
The motorcycle's values are as follows:
u= 0m/s
v=28m/s
t=4s
a=??
s=??
v=u +at
28= 0 + 4a
4a=28
a= 7m/s2
As a result, the typical acceleration is 7 m/s2.
displacement u2+2as, v2=s
28^2= 0^2+ (2x7s)
784= 14s
s= 784/14
s= 56
Therefore, the journey's distance was 56 meters.
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The distance and direction an object moves from its starting point?
Displacement has direction as well as magnitude. Distance traveled is the total length of the path traveled between two positions.