A small airplane with a wingspan of 14.0m is flying due north at a speed of 70.0m/s over a region where the vertical component of the Earth's magnetic field is 1.20µT downward.(b) Which wingtip is at higher potential?
Answers
The wingtip on the northern side of the airplane, as it is flying due north, will be at a higher potential.
To determine which wingtip of the small airplane is at a higher potential, we need to consider the effect of the Earth's magnetic field on the charges moving through the wingspan.
When an electrically conductive object, such as an airplane, moves through a magnetic field, it experiences a force due to the interaction between the magnetic field and the charges in the object. This force is described by the Lorentz force law:
F = q * (v × B)
where:
F is the force on the charges,
q is the charge of the particles (in this case, electrons in the airplane's wings),
v is the velocity of the airplane,
B is the magnetic field.
In this case, the airplane is flying due north, and the Earth's magnetic field has a vertical component of 1.20 µT downward.
Since the airplane is moving horizontally (east-west), and the velocity (v) is perpendicular to the magnetic field (B), the force experienced by the charges is directed vertically, either up or down.
The direction of the force can be determined by applying the right-hand rule, which states that if you extend your right hand with your thumb pointing in the direction of the velocity (v) and your fingers in the direction of the magnetic field (B), the force (F) is perpendicular to both your thumb and fingers.
In this case, the force on the electrons in the airplane's wings will be directed upward. This means that the wingtip on the northern side of the airplane will be at a higher potential.
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Related Questions
Which statement describes the magnetic field inside a bar magnet? It points from north to south. It points from south to north. It forms loops inside the magnet. There is no field within the magnet.
Answers
Inside the bar magnet, the magnetic field points from north to south. Statement A is correct.
Magnetic Field:
It is defined as a vector field or the influence of the magnet on the electric current, charges and ferromagnetic substance.
The strength of magnetic field is depends up on the numbers of magnetic field lines per unit area.
Magnetic field lines emerge from the North pole and end in the South pole of a bar magnet. Inside the magnet are also present inside the bar magnet and never intersect at any point.Therefore, inside the bar magnet, the magnetic field points from north to south.
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Answer:b
Explanation:
A student conducts three experiments to determine how certain quantities influence the centripetal force responsible for an object to spin in a horizontal circle. The student uses one end of a string to attach the object while the other end is connected to a force sensor that allows the student to change the tension on the string, as shown in the figure. The student records data from the three experiments in the table above. Which of the following experiments, if any, collected data that do not agree with the expression for the net centripetal force on the object?
A)The experiment in which mass was changed
B)The experiment in which the radius of the circular path was changed
C)The experiment in which the speed of the object was changed
D)All the data are expected.
Answers
Option C) The experiment in which the speed of the object was changed
is only statement that doesn't satisfy the given data as shown below:
The above statement can be verified using the calculation:
Formula for centripetal force(F) = \(\frac{mv^2}{r}\)
where m is mass of object , v is speed of object and r is radius of the circular motion.
For option A) when only mass of object is changed and rest all are same.
so F = k*m where k = \(\frac{v^2}{r}\) as both are constant
=> \(\frac{F_1}{F_2}\) = 4.04/8.08 = 0.5
and \(\frac{m_1}{m_2}\) = 0.1/0.2 =0.5
so \(\frac{F_1}{F_2} = \frac{m_1}{m_2}\)
similary \(\frac{F_2}{F_3} = \frac{m_2}{m_3}\) and hence data is correct for option A)
For option B) when only radius of object is changed and rest all are
same.
so F = k/r where k = \(m*v^2\) as both are constant
=> \(\frac{F_1}{F_2}\) = 4.04/8.08 = 0.5
and \(\frac{r_2}{r_1}\) = 0.3/0.6 =0.5
so \(\frac{F_1}{F_2} = \frac{r_2}{r_1}\)
so both are same , similary \(\frac{F_2}{F_3} = \frac{r_3}{r_2}\) and hence data is correct for option B
For option C) when only speed of object is changed and rest all are
same.
so F = k*\(v^2\) where k = \(\frac{m}{r}\) as both are constant
=> \(\frac{F_1}{F_2}\) = 4.04/9.09 = 0.44444
and \(\frac{v_1^2}{v_2^2}\) = 4.08/9.181 =0.44439
so ,\(\frac{F_1}{F_2}\) ≠ \(\frac{v_1^2}{v_2^2}\)
and hence data is not correct for option C
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Complete question:
A student conducts three experiments to determine how certain quantities influence the centripetal force responsible for an object to spin in a horizontal circle. The student uses one end of a string to attach the object while the other end is connected to a force sensor that allows the student to change the tension on the string, as shown in the figure. The student records data from the three experiments in the table above. Which of the following experiments, if any, collected data that do not agree with the expression for the net centripetal force on the object?
A)The experiment in which mass was changed
B)The experiment in which the radius of the circular path was changed
C)The experiment in which the speed of the object was changed
D)All the data are expected.
For the common emitter amplifier below, calculate the small signal gain Av=vo/v (from the transistor base to the output node), the input resistance Rm. the output resistance R, and the overall voltage gain G.=vo/vs (from the voltage source to the output node). Assume that the capacitors act as AC shorts and that the transistor?s r0 is infinite (can be neglected). Note, you can use the small signal parameters that you solved for in Problem
Answers
In amplifiers, the coupling and bypass capacitors appear to be shorts to ac at the mid band frequencies.
At low frequencies the capacitive reactance, XC, of these capacitors affect the gain and phase shift of signals, so they must be taken into account.
\(\alpha =\frac{1}{2\pi f}\)
At lower f, the internal capacitances have a very high Xc like opens and have no effect on the transistor’s performance. However, as the frequency goes up (at high f), the internal capacitive reactances go down and they have a significant effect on the transistor’s gain and also it introduces a phase shift; it has the inverse effect to the coupling capacitor.
Miller’s theorem states that C effectively appears as a capacitance from input to ground is as given below-
\(Cin= C(A+1)\)
\(Cout=\frac{CA +C}{\alpha }\)
This shows the effective input and output capacitance.
Critical frequency is given as -
\(\alpha = \lim_{n \to \infty} a_n\)
= 10 log(0.5)
=-3dB
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Poor flexibility can result in __________.
A.
poor mobility
B.
injuries
C.
pain
D.
all of the above
Please select the best answer from the choices provided.
A
B
C
D
Mark this and return
Answers
Answer:
the answers would be D: all the above
An electrical current has a low voltage and a low amperage. What does the amperage represent in the electrical current?
Answers
The amperage represents the rate at which electric charge flows through a conductor.
What is amperage?
Amperage is a measure of electrical current, or the rate at which electrical charge flows through a circuit. It is measured in units of amps (A). Amperage is related to voltage and resistance in an electrical circuit, and can be calculated using Ohm's law. Amperage is important to consider when sizing electrical components and wiring for a circuit, as too much amperage can cause damage to the components.
The amperage, also known as current, represents the rate at which electric charge flows through a conductor. It is measured in amperes (A) and is a measure of the quantity of electric charge that passes through a given point in a circuit per unit of time. In other words, amperage is a measure of how many electrons are flowing through a wire at a given moment. A low amperage means that there is a small amount of electric charge flowing through the conductor. This could be because the resistance of the conductor is high, or because the voltage of the power source is low. A low voltage, on the other hand, means that there is a small potential difference between two points in a circuit, which means that the electric charge is not being pushed as hard and may not be flowing as quickly.
Therefore, it represents the rate at which electric charge flows through a conductor.
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Which of the following is the clearest example of a neuronal membrane’s selective permeability?
a. The Na+-K+ pump only transports Na+ and K+ ions.
b. K+ ions can diffuse across the membrane more easily than Na+ ions.
c. Diffusion of K+ ions out of the neuron causes the membrane potential to become more negative.
d. The concentration gradient for Na+ ions is inward, but the concentration gradient for K+ ions is outward.
Answers
The clearest example of a neuronal membrane's selective permeability is an option (b) - K+ ions can diffuse across the membrane more easily than Na+ ions. This is because the membrane is more permeable to K+ ions than to Na+ ions.
This is due to the presence of potassium ion channels, which allow K+ ions to easily cross the membrane. On the other hand, the presence of sodium ion channels is limited, which makes it more difficult for Na+ ions to cross the membrane.
The selective permeability of the neuronal membrane is crucial for maintaining the proper functioning of the nervous system. It allows for the regulation of ion concentrations inside and outside the cell, which is essential for generating and transmitting electrical signals. This selective permeability is achieved through the presence of ion channels and transporters that selectively allow certain ions to pass through the membrane.
In summary, the clearest example of a neuronal membrane's selective permeability is the fact that K+ ions can diffuse across the membrane more easily than Na+ ions, due to the presence of potassium ion channels and the limited presence of sodium ion channels. Hence, b is the correct option.
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How does the amount of potential energy change if a hill is taller.
Answers
PLEASE HELP
A pendulum is in a spacecraft to measure
acceleration during lift off. Before the launch, its period
is 6.5 X 10-3 s. At a point during lift off, its period is 3.1
X 10-3 s. What is the acceleration at this point?
Answers
Answer:
im just 15 yearsold hehhez i dont know that either
Write the equation for simple harmonic motion (x-t),(v-t), and find v at t=2s and t=3s if the object is initially at the right extreme of origin and moving in the negative x-direction. (A=2cm, T=8s)
Answers
Answer:
Explanation:
T = 8 s
angular frequency ω = 2π / T
= 2 π / 8
= π / 4
x ( t ) = A ( sinωt + π / 2 ) because initial phase difference is π / 2
= A cos ωt
= A cos π t / 4
v = Aω sinωt
= 2 x π / 4 sinωt
= .5 π sinπt / 4
when t = 2
v = .5 π sinπ x 2 / 4
= .5 π x 1
= 1.57 cm /s
At t = 3 s
v = .5 π sin π x 3 / 4
= .5 π sin 135°
= .5 π / √ 2
= 1.11 cm /s
What is the differ-
What’s the difference between
the displacement
of the photogra-
pher flying from
Florida to California and the
displacement of the astro-
nauts flying from California
back to Florida?
Answers
Explanation:
What is the difference between the displacement of the photographer flying from FL to CA and the displacement of astronauts flying from CA back to FL? The displacements have opposite directions. Car 'A' travels from New York City to Miami ata speed of 25 m/s.
A person weighing 645 N climbs up a ladder to a height of 4.55 m. What is the
increase in gravitational potential energy?
Answers
Answer:
P.E = 2934.75
Explanation:
Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
\( P.E = mgh\)
Where, P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
Given the following data;
Weight =645
Height = 4.55
\( P.E = mgh\)
But we know that weight = mg = 645N
Substituting into the equation, we have;
\( P.E = 645 * 4.55 \)
\( P.E = 2934.75 J\)
Potential energy, P.E = 2934.75 Joules.
What is the equivalent resistance between terminals A and B, measured in ohms?
Answers
Answer:
c. 0.80
Explanation:
they will choose the path that has not resistance
Show that a light ray that strikes two mutually perpendicular reflecting surfaces is reflected back exactly parallel to the direction from which it came.
Answers
Take a look at the attachment below. As you can see, the figure demonstrates a 90 degree angle such that the surfaces are perpendicular, and hence are independent of the angle of incidence. You could say that this forms a part of a parallelogram -
A 8 kg Ice skater is moving at 5 m/s and is headed towards a stationary 2 kg snowman. After the two collide, the ice skater has 0 m/s of velocity and the snowman moves forward. What is the velocity of the snowman?
Answers
Answer:
\(20\; {\rm m\cdot s^{-1}}\), assuming that friction is negligible.
Explanation:
If an object of mass \(m\) moves at a velocity of \(v\), the momentum \(p\) of this object would be \(p = m\, v\).
if friction is negligible, the sum of the momentum should be the same before and after the collision.
Before the collision:
Momentum of the ice skater was \((8\; {\rm kg})\, (5\; {\rm m\cdot s^{-1}}) = 40\; {\rm kg \cdot m\cdot s^{-1}}\).Momentum of the snowman was \((2\; {\rm kg})\, (0\; {\rm m\cdot s^{-1}}) = 0\; {\rm kg\cdot m\cdot s^{-1}}\).In other words, the sum of momentum was \(40\; {\rm kg\cdot m\cdot s^{-1}}\) before the collision.
After the collision:
Momentum of the ice skater became \((8\; {\rm kg})\, (0\; {\rm m\cdot s^{-1}}) = 0\; {\rm kg \cdot m\cdot s^{-1}}\).Momentum of the snowman needs to be found.The sum of the momentum stays unchanged at \(40\; {\rm kg\cdot m\cdot s^{-1}}\). Subtract the momentum of the ice skater from the sum to find the momentum of the snowman:
\(40\; {\rm kg\cdot m\cdot s^{-1}} - 0\; {\rm kg\cdot m\cdot s^{-1}} = 40\; {\rm kg\cdot m\cdot s^{-1}}\).
Divide the momentum of the snowman by its mass to find its velocity:
\(\begin{aligned}\frac{40\; {\rm kg\cdot m\cdot s^{-1}}}{2\; {\rm kg}} = 20\; {\rm m\cdot s^{-1}}\end{aligned}\).
In other words, the collision of the snowman would be \(20\; {\rm m\cdot s^{-1}}\) after the collision.
Under what circumstances will the copy constructor run? Select all that apply. 1-When the object is declared as a local variable. 2-When the object is passed by value to a function 3-When the object is passed by reference to a function. 4-When the local object is returned from a function 5-When the object being declared is initialized to an object of the same type
Answers
The copy constructor will run when the object is passed by value to a function, returned from a function, or initialized to an object of the same type.
How does the copy constructor run?The copy constructor will run under the following circumstances:
When the object is passed by value to a function.
When the object is returned by value from a function.
When the object being declared is initialized to an object of the same type.
So, the correct options are:
2- When the object is passed by value to a function.
4- When the local object is returned from a function.
5- When the object being declared is initialized to an object of the same type.
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Which statement best describes what happens during a solar eclipse?
A. The Sun casts a shadow directly on Earth and the Moon.
B. Earth passes directly between the Sun and the Moon.
C. The Moon passes directly between Earth and the Sun.
D. Earth casts a shadow directly on the Sun and the Moon.
Answers
Answer: A.
Explanation:
Solar eclipse happens when Sun casts a shadow directly on Earth and the Moon. Option A is correct.
What is solar eclipse?A solar eclipse occurs when the Sun throws a shadow directly on Earth and the Moon.
When the Sun throws a shadow directly on the Earth and the Moon, it is called a solar eclipse.
Hence,option A is correct.
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Will Give Brainlist
Check pic for question
Answers
V= 0.02 x 4000 = 80v
Answer:
D: 80v is the anwser to the question
The atomic bomb dropped on Hiroshima converted about 7.00x10-4kg of mass to energy. How much energy did that bomb produce?
A)2.10x10^5J
B)7.78x10^-21J
C)6.30x10^13J
D)2.10x10^61J
Answers
Answer:
\( \sf \: given \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \bf \: mass \: \: \: m \: = 7.00 \times {10}^{ - 4} \: kg \\ \\ \bf \: E=mc^2 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ = > E=7.00 \times {10}^{ - 4} \times ({3 \times {10}^{8} })^{2} \\ \\ = > \green{ \boxed{ E = 6.3 \times {10}^{13} \: J}}\)
Mechanical engineers generally work in all of the following EXCEPT
•marine biology.
•aerospace products.
•automotive industry.
•computers and electronics.
Answers
Answer:
•marine biology.
Explanation:
A mechanical engineer is a professional individual who ensures the design of a mechanical assembly as well as the monitoring of its realization. His role involves the manufacturing of a prototype and developing new products for the company. Responsible for manufacturing, he advises the company and customers and assesses the risks and techniques used for its development. Finally, he supervises the installation and the market penetration of the product, as well as its maintenance.
A mechanical engineer can collaborate with many useful and complementary professions such as designers or marketers, it ensures the appearance and technical operation of the product. It is a job under high responsibility with projects that can be large.
Finally, he can also work in the construction sector, in the automotive industry, biomechanics, shipbuilding, aerospace production and aeronautics, railways, mechanics and metallurgy, robotics, textile machinery, etc.
how do plants get energy
Answers
Explanation:
They get energy by taking water and minerals from the ground by root and take CO2 by leaves.They get energy by absorbing sunlight and use in the process of photosynthesis10 20 30 40 50 60 70 80 90 100 110 120 130. Which end of the scale (left or right) has the loudest sounds?
Answers
Answer:
I'm From Philippines
I hope we can be friends.
One form of energy that exists in every system but is difficult to quantify is heat. Think about how we formulated our spring resonance model. Did we account for the heat energy in the medium? why do we need to?.
Answers
No, our spring resonance model did not account for the heat energy in the medium. Heat energy is generated due to the friction between the spring and the medium during the oscillation of the spring.
This energy is dissipated into the medium in the form of thermal energy, causing the amplitude of the oscillation to decrease over time.
In order to develop an accurate and complete model of the spring resonance, we need to account for the heat energy generated during the oscillation.
This is important because the amount of heat generated depends on the mechanical properties of the medium and the frequency and amplitude of the oscillation, and can have a significant impact on the behavior of the system.
By accounting for heat energy, we can better understand the dynamics of the system and predict how it will behave over time.
This can be particularly important in practical applications, such as in engineering and design, where we need to know how a system will perform under different conditions and over long periods of time.
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Which statement accurately describes the relationship between force and momentum?
A. As the mass of an object increases, its momentum decreases, and it takes less force to change its motion.
B. As the velocity of an object decreases, its momentum increases, and it takes more force to change its motion.
C. As the mass of an object increases, its momentum increases, and it takes more force to ohange its motion
D. As the velocity of an object increases, its momentum decreases, and it takes less force to change its motion
Answers
Answer:
A.
Explanation:
momentum depends on weight and speed
Baker Bill used 67 kilograms of flour on Monday. He used 48 kilograms of flour on Tuesday. How much did he use in all?
Answers
The total amount of flour he used in all is 115kg
What is Addition?One of the four fundamental operations in mathematics is addition, along with subtraction, multiplication, and division. When two whole numbers are added, the sum or total of those values is obtained.
Given that Baker Bill used 67 kilograms of flour on Monday. He used 48 kilograms of flour on Tuesday
We would add the kg of flour he used
This would be 67 + 48 = 115kg of flour
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A car speeds up from rest to some final velocity in some amount of time. If the time is doubled to reach the same final velocity, what
happens to the acceleration? Is this a proportional or inversely proportional relationship?
Answers
If the time is doubled to reach the same final velocity, then the acceleration will be half the acceleration before.
What is the rate of change?The rate of change of an object's velocity with respect to time is defined as acceleration. Vector quantities are accelerations.
Let's assume the final and the initial velocity of the object is v and u, respectively. Also, the time it takes is represented by t. Therefore, the acceleration can be written as,
a₁ = (v-u)/t
Now, if the time is doubled then the acceleration can be written as,
a₂ = (v-u)/2t
= (1/2) × [(v-u)/t]
= 0.5 × a₁
a₂ = 0.5a₁
Hence, If the time is doubled to reach the same final velocity, then the acceleration will be half the acceleration before.
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A student connects two resistors with unknown resistance values in series, and notes that the equivalent resistance R5=775Ω. She then connects the same two resistors in parallel, and measures the equivalent resistance to be RP=130Ω. What are the resistances (in Ω ) of each resistor? smaller 24 resistance Write equations for the series and parallel combinations, and combine your equations to find the two possible values. You will need to use the quadratic equation. Ω larger x resistance Write equations for the series and parallel combinations, and combine your equations to find the two possible values. You will need to use the quadratic equation. Ω
Answers
We have found two values of resistance which are 260Ω and 387.5Ω
Let the resistance of the two unknown resistors be represented as R and R.
The student measures R5=775Ω.
The equation for resistance in series combination is given as;
R5= R + R.R5= 2R
From this ,R = R5/2= 775/2= 387.5Ω
Similarly, when the student measured in parallel, RP=130Ω.
The equation for resistance in parallel combination is given as;
1/RP= 1/R + 1/R.
The value of R can be obtained from the following formula;
RP= R*R/(R + R)RP= R/2
The value of R = RP*2 = 130*2 = 260Ω.
Now we know that both values of R are equal. This means that the two resistors are identical and are 260Ω each.
If we take the values of R to be x; and if we put these values in the equation R5 = R + R we get:
R5 = 2x = 775Ωx = 387.5Ω
If we take the values of R to be x; and if we put these values in the equation RP = R/2 we get:
RP = x/2 = 130Ωx = 260Ω
Thus, we have found two values of resistance which are 260Ω and 387.5Ω (rounded off to the nearest decimal place). These two values satisfy the given conditions.
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A satellite is in orbit 35600 km above the surface of the Earth. Its angular velocity is 7.27 * 10 ^ - 5 rad/s. What is the velocity of the satellite? (The radius of the Earth is 6400 km.)
Answers
The linear velocity of the satellite at the given angular speed and position is determined as 3,053.4 m/s.
What is the linear velocity of the satellite?
The linear velocity of the satellite is calculated by applying the following equations.
v = ωr
where;
ω is the angular velocity of the satellite r is the distance of the satellite from the center of the EarthThe linear velocity of the satellite is the tangential velocity of the satellite and it is measured along the axis or circumference of the Earth.
The distance of the satellite from the center of the Earth is calculated as follows;
r = 35600 km + 6400 km
r = 42,000 km
r = 42,000,000 m
The linear velocity of the satellite is calculated as follows;
v = (7.27 x 10⁻⁵ rad/s) x (42,000,000)
v = 3,053.4 m/s
Thus, the linear velocity of the satellite depends on the angular velocity and distance.
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Which two factors affect the size of the gravitational field?
Answers
Answer:
Explanation:
mass and distance
What is the Elastic potential energy of a car spring that has been stretched 0.5 meters? The spring constant for the car spring is 90 N/m.
Answers
Answer:
PE = 11.25 J
Explanation:
Elastic Potential Energy
It's the energy stored in an elastic material like a spring of constant k, in which case the energy is proportional to the square of the change of length Δx and the constant k.
\(\displaystyle PE = \frac{1}{2}k(\Delta x)^2\)
The car spring has a constant of k=90 N/m and it stretches Δx=0.5 m. The elastic potential energy is:
\(\displaystyle PE = \frac{1}{2}\ 90(0.5)^2\)
Calculating:
PE = 11.25 J
Elastic potential energy is the potential energy held when an elastic item is stretched or compressed by an external force. The elastic potential energy of a car spring will be 11.25 J.
What is elastic potential energy?Elastic potential energy is the potential energy held when an elastic item is stretched or compressed by an external force. It is equal to the work done to extend the spring.
The given data in the problem is;
x is the distance by which spring got stretched = 0.5 m
k is the spring constant for the car = 90 N/m.
The formula for the elastic potential energy is;
\(\rm PE =\frac{1}{2} kx^{2} \\\\ \rm PE =\frac{1}{2} \times 90 (0.5)^{2} \\\\ \rm PE = 11.25\; J\)
Hence the elastic potential energy of a car spring will be 11.25 J.
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Melanie obtains a value of 3.181 g/mL for the density of her unknown solution. The actual density of the solution is 1.773 g/mL. What is the % error of Melanie's measurement
Answers
The percent error of Melanie's measurement, is 79.43%.
Given that Melanie obtained a density value of 3.181 g/mL (Experimental Value), and the actual density of the solution is 1.773 g/mL (Actual Value), we can substitute these values into the formula:
Percent Error = [(|3.181 g/mL - 1.773 g/mL|) / 1.773 g/mL] × 100%
Simplifying the calculation:
Percent Error = [(1.408 g/mL) / 1.773 g/mL] × 100%
Percent Error = 0.7943 × 100%
Percent Error = 79.43%
Therefore, Melanie's measurement has a percent error of approximately 79.43%.
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