The charge could have a final velocity of either 4.47 m/s or -4.47 m/s, depending on the direction of the electric field and the direction of the force exerted on the charge.
ΔK = (1/2)mv²f - (1/2)mv²i
Substituting these values into the equation, we get:
(1/2)mv²f - (1/2)mv²i = W
(1/2)(1 kg)(v²f - 0) = 10 J
Simplifying the equation, we get:
v²f = 20 m²/s²
Taking the square root of both sides, we get:
vf = ±4.47 m/s
Velocity is a vector quantity that describes the rate at which an object changes its position in a particular direction. It is defined as the rate of change of displacement with respect to time. Velocity is expressed in units of meters per second (m/s) or any other unit of distance divided by time. The direction of the velocity vector is the same as the direction of motion of the object.
The difference between velocity and speed is that velocity takes into account the direction of motion, whereas speed only refers to the magnitude of the motion. An object can have different velocities at different times. If the velocity of an object changes, then it is said to be accelerating. The acceleration of an object is the rate of change of velocity with respect to time.
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Describe the magnetic field lines between like poles.(what is the direction indicated and why
Answer/Explanation:
The magnetic fields line are closer apart at other places. Hence, magnetic field is strongest at the poles. Magnetic Field has Direction The Magnetic Field lines are like closed curves They emerge from North Pole and Merge to South Pole.
Brainliest?!
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Help on this physics question
By using the equations for parabolic motion, we proceed to present the answers for the paragraph seen in the picture: a) t ≈ 0.553 s, b) s = 2.212 m, c) s = 11.060 m.
How to analyze a system on parabolic motion
A system is on parabolic motion if such system can be represented as a particle, that is, a system whose geometry is negligible, and its motion is a combination of horizontal movement at constant velocity and vertical uniformly accelerated movement due to gravity and all viscous and rotational effects are negligible.
The time required for the droplet to reach the ground is:
1.5 m = (1 / 2) · (9.807 m / s²) · t²
t = √[2 · (1.5 m) / (9.807 m / s²)]
t ≈ 0.553 s
And the horizontal distance traveled by the droplet is:
s = (4 m / s) · (0.553 s)
s = 2.212 m
Now, we apply the same procedure for the case of sneezing person:
1.5 m = (1 / 2) · (9.807 m / s²) · t²
t = √[2 · (1.5 m) / (9.807 m / s²)]
t ≈ 0.553 s
s = (20 m / s) · (0.553 s)
s = 11.060 m
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An astronomer observes the moon when it is in its last quarter phase. What lunar phase will the astronomer be able to observe in about 28 days
Answer:
new moon is the answer to question
Either funding for nuclear fusion will be cut or if significantly high temperatures are achieved in the laboratory, nuclear fusion will become a reality. Either the supply of hydrogen fuel is limited, or if nuclear fusion becomes a reality, the world's energy problems will be solved. Funding for nuclear fusion will not be cut. Furthermore, the supply of hydrogen fuel is not limited. Therefore, if sufficiently high temperatures are achieved in the laboratory, the world's energy problems will be solved. (C,H,R, S, E)
1. C∨(H>R)
2. S∨(R>E)
3∼C
4∼S /H>E
if sufficiently high temperatures (R) are achieved in the laboratory, nuclear fusion (S) becomes a reality, and as a result, the world's energy problems (E) will be solved.
How do we explain?C= Funding for nuclear fusion will be cut.
H = Supply of hydrogen fuel is limited.
R = Sufficiently high temperatures are achieved in the laboratory.
S = Nuclear fusion becomes a reality.
E = World's energy problems are solved.
We then represent the statements as:
C ∨ (H > R) (Either funding for nuclear fusion will be cut or if the supply of hydrogen fuel is limited, sufficiently high temperatures will be achieved in the laboratory.)S ∨ (R > E) (Either nuclear fusion becomes a reality or if sufficiently high temperatures are achieved in the laboratory, the world's energy problems will be solved.)C (Funding for nuclear fusion will not be cut.)S / H > E (Nuclear fusion will not become a reality, or if the supply of hydrogen fuel is limited, the world's energy problems will be solved.)Learn more about Nuclear fusion at:
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8. Jax bounced a dodgeball off a wall. The dodgeball has a momentum of 32.6 kg · m/s after the
collision. What is the total momentum of the system before the collision?
Answer:
\(32.6\ \text{kg m/s}\)
Explanation:
\(p_f\) = Final momentum of the system = \(32.6\ \text{kg m/s}\)
According to the principle of conservation of angular momentum we have
\(p_i=p_f\\\Rightarrow p_i=32.6\ \text{kg m/s}\)
The wall is not moving so the initial and final momentum of the system are equal.
So, the total momentum of the system before the collision is \(32.6\ \text{kg m/s}\).
A 4.0kg bowling ball sliding to the right at 8.0 m/s has an elastic head-on collision with another 4.0 kg bowling ball initially at rest. The first ball stops after the collision
a)
We use the formula :
m1v1i + m2v2i = m1v1f + m2v2f
Substituting the values in:
4.0kg*8.0m/s + 4.0kg*0m/s = 4.0kg*0m/s +4.0kg*v2f
Calculating this we get:
32.0kg*m/s + 0kg*m/s = 0kg*m/s + 4.0kg*v2f
Rearrange for v2f:
v2f = \(\frac{32.0kg*m/s}{4.0kg}\)
This gives us 8.0 m/s as the final velocity of the second ball.
b)
Since the collision is assumed to be elastic it means that the kinetic energy must be equal before and after the collision.
This means we use the formula:
Ek = \(\frac{1}{2} *m*v^{2}\)+ \(\frac{1}{2} *m*v^{2}\) = \(\frac{1}{2} *m*v^{2}\) + \(\frac{1}{2}*m*v^{2}\)
Substituting in values:
Ek = 0.5*4.0kg*(8.0m/s)^2 + 0.5*4.0kg*(0m/s)^2 = 0.5*4.0kg*(0m/s)^2 + 0.5*4.0kg*(8.0m/s)^2
This simplifies to:
Ek= 128J + 0J = 0J + 128J
This shows us that the kinetic energy is equal on each side therefore the collision is Elastic and no energy has been lost.
The final velocity of the second ball after collision is 8 m/s.
The total kinetic energy of the balls before and after collision is the same.
The given parameters;
mass of the first ball, m₁ = 4 kgmass of second ball, m₂ = 4 kginitial velocity, u₁ = 8 m/sinitial velocity of the second, u₂ = 0Apply the principle of conservation of linear momentum to determine the final velocity of the second ball.
\(m_1u_1 + m_2u_2 = m_1v_1 + m_2 v_2\\\\4(8) + 4(0) = 4(0) + 4(v_2)\\\\32 = 4v_2\\\\v_2 = 8 \ m/s\)
The final velocity of the second ball after collision is 8 m/s.
The total kinetic energy of the balls before collision is calculated as follows;
\(K.E_i = \frac{1}{2} \times 4 \times 8^2 \ + \ \frac{1}{2} \times 4 \times 0^2\\\\K.E_i = 128 \ J\)
The total kinetic energy of the balls after collision is calculated as follows;
\(K.E_f = \ \frac{1}{2} \times 4 \times 0^2 + \frac{1}{2} \times 4 \times 8^2 \\\\K.E_f = 128 \ J\)Learn more here:https://brainly.com/question/24424291
A child on a skateboard is moving at a speed of 2 m/s. After a force acts on the child, her speed is 3 m/s. What can you say about the work done by the external force on the child
The work done by the external force on the child is positive.
Why is the work done by the external force considered positive?When a force is applied to an object, work is done on that object. Work is defined as the product of the force applied on an object and the distance over which the force acts. In this case, the external force acted on the child on a skateboard, causing her speed to increase from 2 m/s to 3 m/s.
To calculate the work done, we can use the formula for work:
\[ \text{Work} = \text{Force} \times \text{Distance} \times \cos(\theta) \]
Since the child's speed increased, we know that the force and displacement acted in the same direction. Therefore, the angle between the force and displacement vectors, denoted by theta (θ), is 0 degrees, and the cosine of 0 degrees is 1.
Considering the child's speed increased, we can conclude that the force applied in the direction of motion did positive work on the child. The positive work done by the external force resulted in an increase in the child's kinetic energy, causing her speed to change.
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A bow has k= 458 N/m. It is
pulled back 0.720 m, and used tofire a 0.0925 kg arrow. It hits a bird 24.7 m above the ground. What is the speed of the arrow when it hits?
Answer:
The final speed of the arrow when it hits the target is 45.63 m/s.
Explanation:
Given;
spring constant of the bow, k = 458 N/m
extension of the bow, x = 0.72 m
mass of the arrow, m = 0.0925 kg
let the initial speed of the arrow after being fired = u
Apply the law of conservation of energy, the elastic potential energy of the bow will be converted to kinetic energy of the arrow.
\(\frac{1}{2} kx^2 = \frac{1}{2} mu^2\\\\kx^2 = mu^2\\\\u^2 = \frac{kx^2}{m} \\\\u= \sqrt{\frac{kx^2}{m} } \\\\u = 50.66 \ m/s\)
The speed of the arrow when it hits a target 24.7 m above the ground is calculated as;
v² = u² + 2gs
where;
v is the final speed when the arrow hits the target
g is acceleration due to gravity = (-9.8 m/s², upward motion)
v² = 50.66² + 2(-9.8)24.7
v² = 2566.44 - 484.12
v² = 2082.32
v = √2082.32
v = 45.63 m/s
Therefore, the final speed of the arrow when it hits the target is 45.63 m/s.
A 500 N person is lifted 5 m in 10 seconds so the power for this task is 250 watts, is this statement a fact or an opinion
The statement "A 500 N person is lifted 5 m in 10 seconds, so the power for this task is 250 watts" is a fact because the calculated power matches the given value of 250 watts.
To determine if the statement "A 500 N person is lifted 5 m in 10 seconds, so the power for this task is 250 watts" is a fact or an opinion, we need to calculate the power and compare it with the given value (250 watts).
Here are the steps to calculate power:
1. Identify the work done: Work = Force x Distance
2. Calculate the work: Work = 500 N x 5 m = 2500 J (joules)
3. Identify the time taken: Time = 10 seconds
4. Calculate the power: Power = Work / Time
Now, let's plug in the values and calculate the power:
Power = 2500 J / 10 s = 250 W
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the substance of the physical world
Answer:
The substance of the physical world; anything that occupies space or has substance. An organized way of scientists to gather and pursue scientific knowledge. Consists of three main components: Hypothesis, Observation, and Experimentation. One of the main components of the Scientific method.
Explanation:
A car is driving forward at a slow but constant velocity of 10 metere per second through a school zone. What is the car's acceleration?
A. The car has slowed down
B. The car has high acceleration
C. The car has no acceleration
Answer:
option b
Explanation:
hope its help
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The Elaboration Likelihood model (ELM) suggests that ________________________. peripheral route processing is the more resistant to counter persuasion than central route processing. when people use shortcuts based on visuals (speaker appearance, charisma) or previous knowledge, then they are using the peripheral route to process information. speaker charisma and looks trigger the central route, which is the preferred route. once we trigger the peripheral route it is impossible to ever use the central route.
The Elaboration Likelihood Model (ELM) suggests that peripheral route processing is the more resistant to counter persuasion than central route processing
Central route processing involves carefully considering the content of a persuasive message and is more resistant to counter persuasion than peripheral route processing. Peripheral route processing, on the other hand, relies on shortcuts, such as speaker appearance, charisma, or previous knowledge, to process information, this route is less resistant to counter persuasion. While speaker charisma and looks might be thought to trigger the central route, they are actually factors associated with the peripheral route, which is not the preferred route for long-lasting attitude change. The central route requires more cognitive effort, as it engages a person's critical thinking and analysis of the message.
The peripheral route is less effortful but tends to produce less durable changes in attitudes and beliefs, it is not true that once the peripheral route is triggered, it is impossible to ever use the central route. Individuals may switch between the two routes depending on factors such as their motivation, ability to process information, and the relevance of the message to their personal situation. To encourage central route processing, it is important to present persuasive messages that are logically sound, well-reasoned, and supported by evidence. So therefore the Elaboration Likelihood Model (ELM) suggests that there are two distinct routes to persuasion: the central route and the peripheral route.
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What are the coordinates of M' after triangle MNO is reflected over the y-axis, and rotated 90 degrees clockwise with the origin as the center of rotation?(0,-6)(0,6)(6,0)(-6,0)
Which of the following pairs of quantities are expressed in the same units of measure? A.friction and weight. B.work and energy? C.both A and B
The pair of quantities expressed in the same units of measure is B. work and energy. Work and energy are both expressed in the same units of measure.
Both work and energy are measured in joules (J) in the International System of Units (SI). Joules represent the amount of energy transferred or work done.
Work is defined as the transfer of energy that occurs when a force is applied to an object and causes it to move in the direction of the force. The work done on an object is equal to the force applied multiplied by the distance over which the force is exerted. The unit of work, joules, represents the amount of energy transferred.
Energy, on the other hand, is the ability to do work or transfer heat. It exists in various forms, such as kinetic energy (energy of motion), potential energy (energy stored due to position), and thermal energy (energy associated with temperature). Energy is also measured in joules.
Friction and weight, mentioned in option A, are not expressed in the same units of measure. Friction is a force and is typically measured in newtons (N), while weight is a force caused by gravity and is also measured in newtons.
Therefore, the pair of quantities expressed in the same units of measure is B. work and energy.
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Before raw data can be used as scientific evidence, it must be analyzed and summarized. one way of summarizing data is to find the mean, or average, of a set of data points. what method is used for calculating the mean? adding the values of all the data points and dividing by the number of data points dividing the value of each data point by the total value of all the data points multiplying the values of the highest and lowest data point, and then dividing by two subtracting the highest value among the data points from the lowest value
Adding the values of all the data points and dividing by the number of data points dividing the value of each data point by the total value of all the data points multiplying the values of the highest and lowest data point, and then dividing by two subtracting the highest value among the data points from the lowest value.
A scientific model is a bodily and/or mathematical and/or conceptual representation of a system of ideas, occasions, or procedures. Scientists are seeking to perceive and recognize patterns in our world by drawing on their scientific understanding to offer motives that enable the styles to be anticipated.
Benefits of modeling and simulation :
* Can be more secure and less expensive than the real international.
* Able to test a product or device that works earlier than building it.
* Can use it to discover unexpected troubles.
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An object moving with a speed of 35 m/s and has a mass of 75kg what is the kinetic energy
Answer:
KE= 656.25 J
Explanation:
KE= ?
m= 75 kg
v= 35 m/s
KE= 1/2 (75)(35)^2
KE= (37.5)(17.5)
KE= 656.25 J
PLEASE HELP!!!!
What is intelligence?
the emotional abilities of an individual to learn from experience, and to cope effectively with the demands of daily living
the ability to score well on standardized tests,
the cognitive abilities of an individual to learn from experience to reason well, and to cope effectively with the demands of daily living,
how quickly an individual can reduce or eliminate stress
Answer:
the cognitive abilities of an individual to learn from experience to reason well, and to cope effectively with the demands of daily living
Explanation:
Yes that can be understood by a simple example
Suppose two people are in exam
A difficult and logical question cameThe person can use his cognitive abilities faster can solve that\(\large\longrightarrow \) Intelligence is the cognitive abilities of an individual to learn from experience to reason well, and to cope effectively with the demands of daily living.
i neeeeeeeeed a angle of projectile investigation report
19. The atmosphere of which of these Solar System bodies is primary, as opposed to secondary, in origin?a. Venusb. Earthc. Saturn's moon Titand. Saturne. Mars
The atmosphere of Earth is considered to be primary in origin, unlike those of Venus, Mars, Titan, and Saturn.
So, the correct answer is B
This means that Earth's atmosphere is primarily made up of gases that were present during the planet's formation and evolution, rather than being a result of external factors such as volcanic activity or impacts from comets and asteroids. Earth's atmosphere is mostly composed of nitrogen, oxygen, and trace amounts of other gases like carbon dioxide and methane.
This atmosphere plays a crucial role in regulating Earth's temperature and protecting life on the planet from harmful solar radiation.
The study of Earth's atmosphere is a crucial area of research in climate science and planetary science.
Hence,the answer of the question is B
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What is the kinetic energy of the ball as it is halfway through the fall from a forty foot building? What is the potential energy?
Answer:
The kinetic energy is more than half of its maximum energy
wire 1 has a resistance r1. wire 2 is made of the same material, is half as long and has half the diameter. what is the ratio r2/r1? r2/r1
The resistance of the wire is R1
Let L be the length of the wire and d be the diameter
Then resistance
R1 = ρL/A
Where ρ is the resistivity of the material
A is the crossectional area = πd2/4
As the material is not changed, ρ does not changes
new length L' = L/2
new diameter d' = d/2
Therefore the new resistance is
R2 = ρL'/A'
R2 = ρ(L/2)/(A/4) (A' = π(d/2)2/4)
R2 = 2 ρL/A
R2 = 2R1
R2/R1 = 2
What is resistance?
The material a thing is constructed of has a significant impact on how resistant it is. Electrical insulators like rubber have extremely high resistance and poor conductance tendencies, whereas electrical conductors like metals have extremely low resistance and high conductivity tendencies. Conductivity or resistivity are used to measure this relationship. However because resistance and conductance are extensive rather than intense qualities, they depend on the size and shape of an object as well as the type of the material. For instance, if a wire is long and thin, its resistance will be higher, and if it is short and thick, it will be lower. Except for superconductors, which have a resistance of zero, all objects resist electrical current.To know more about resistance, click the link given below:
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The vertical axis is called the y axis. What is the horizontal axis called
Answer:
the horizontal axis is called the x axis.
What do all heterotrophs have in common?
A: Their diets must include meat incorrect answer
B: They must drink at least one liter of water each day to survive incorrect answer
C: They must consume nutrients to survive incorrect answer
D: They must breathe oxygen to survive
Answer:
c
Explanation:
your welcome dude good luck
A car is travelling along a road when the driver spots a hedgehog crossing ahead. The driver applies a braking force of 2500 N and manages to stop the car after 7.5 metres to avoid the hedgehog. Calculate the work done by the brakes to stop the car.
The work done by the brakes to stop the car will be 56.25 kN-m.
What is the work done?If the amount of force is applied to the body and the body gets displaced from its original place. Then it is said to work is done on the system. The work done is given as,
WD = Force x Displacement
A vehicle is going along a street when the driver detects a hedgehog crossing ahead. The driver applies a slowing down the power of 2500 N and figures out how to stop the vehicle after 7.5 meters to stay away from the hedgehog.
The work done is calculated as,
WD = 7500 x 7.5
WD = 56,250 N-m
WD = 56.25 kN-m
The work done by the brakes to stop the car will be 56.25 kN-m.
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What is the centripetal force on a car with a mass of 1,500 kg that is traveling in a circle with a radius of 19 m at a tangential velocity of 5 m/s?
The centripetal force on the car with a mass of 1500 kg is 1973.7N.
What is centripetal force?A centripetal force is a force that makes a body follow a curved path.
To calculate the centripetal force on a car, we use the formula below.
Formula:
F = mv²/r.............. Equation 1Where:
F = Centripetal forcem = Mass of the carr = radius of the circlev = Velocity of the car.Where:
m = 1500 kgv = 5 m/sr = 19 mSubstitute these values into equation 1
F = (1500×5²)/19F = 1973.7NHence, the centripetal force on the car is 1973.7N.
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Study the earth view panel at the top of the window. Would this planet be a good candidate for a transit observation? why or why not?.
Yes, because from the perspective of Earth, the planet appears to move in front of the star.
What do you understand by the term transit observation?
When a planet passes in front of an observer and a star, it is said to be transiting. When Venus or Mercury pass in front of Earth and the Sun, transits inside our solar system can be seen from the planet.
Therefore, Earth would be a good candidate for a transit observation as from the perspective of Earth, the planet appears to move in front of the star.
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An electron with an initial speed of u and a proton with an initial speed of 2u move in circles in a uniform magnetic field B. Compare the work done by the magnetic field on each particle a The work on both particles is the same and non-zero b The work on the proton is twice the work on the electron c The work on the electron is twice the work on the proton. d The work on both particles is the same and zoro
The work done by the magnetic field on each particle is the same and is not zero.
What is magnetic field?A magnetic field is a region in space where a magnetic force is present. This force is caused by the motion of electrically charged particles, such as electrons and protons, and is felt as a force that can attract or repel other magnetic objects. Magnetic fields are created by magnets, or by electric currents. The Earth has its own magnetic field, which is produced by the motion of the planet's molten iron core. Magnetic fields can be used to create energy, power motors, and generate electricity.
This is because the work done by the magnetic force on a charged particle is equal to the product of the charge of the particle, the magnetic field strength and the angle through which the charge moves in the magnetic field. Since both particles have the same charge (1.6 x 10^-19 C) and the same angle, the work done on them is the same.
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metal object is earthed by connecting it to ......
Answer:
ii) Insulating materials that gain electrons when rubbed become negatively charged. c) An electric current is a flow of charge. d) An isolated metal object that is initially uncharged will gain charge if it is brought into contact with a charged object. e) A metal object is earthed by connecting it to the ground.
Explanation:
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An average 1.50 V Alkaline AA battery has 9,360 J of stored energy. If the battery is placed in a toy that requires 2.00 amperes of current to operate, how many minutes will the battery last before it runs out of energy?
Answer:
52 minutes
Explanation:
Given the following data;
Voltage = 1.5 V
Current = 2 Amperes
Energy = 9360 J
To find how many minutes will the battery last before it runs out of energy;
First of all, we would determine the power rating of the toy
Power = current * time
Power = 2 * 1.5
Power = 3 Watts
Next, we find the time;
Energy = power * time
9360 = 3 * time
Time = 9360/3
Time = 3120 seconds
To convert to minutes;
60 seconds = 1 minute
3120 seconds = 3120/60 = 52 minutes
Two Large, Charged Plates With Charge Density ±30µC/M^2 Face Each Other With A Separation Of 5.0 Mm. The Negative Plate Is_____
The negative plate is the one facing us because the electric field between the plates is zero, which can only happen if the two plates have the same magnitude and opposite sign of charge density.
What is charge density?
Charge density is the amount of electric charge per unit area or per unit volume of a material or object. It is usually denoted by the symbol ρ and is measured in units of coulombs per square meter (C/m²) or coulombs per cubic meter (C/m³).
In the case of a charged plate, the charge density is the total charge on the plate divided by its surface area. For example, if a plate has a charge of 60 µC and an area of 2 m², then the charge density is:
Charge density = 60 µC / 2 m² = 30 µC/m²
Charge density is an important concept in electrostatics, as it is used to describe the distribution of electric charge over a surface or within a volume. It is also used in the calculation of electric fields and forces in electrostatics, as the electric field depends on the charge density of the objects producing the field.
Two large, charged plates with charge density ±30µC/m² facing each other with a separation of 5.0 mm.
One of the plates has a negative charge density.
We want to find out which plate is negative
1. Calculate the total charge on one of the plates using the charge density and the area of the plate:
Q = ±30 µC/m² * A
Here, A is the area of one of the plates.
2. Calculate the electric field due to each plate using Coulomb's law:
E = (1/4πε₀) * (Q / r²)
Here, r is the distance between the plates, which is 5.0 mm or 0.005 m.
ε₀ is the permittivity of free space, which is a constant and has a value of 8.85 x 10⁻¹² F/m.
Since there are two plates, calculate the electric field due to each plate and then take the difference between them to get the net electric field between the plates.
3. Substitute the values and calculate the electric field due to each plate:
E1 = (1/4πε₀) * (Q / r²)
E2 = (1/4πε₀) * (Q / r²)
Here, E1 is the electric field due to one plate, and E2 is the electric field due to the other plate. Since the plates have the same magnitude of charge density, their charges will have the same magnitude too, so we can drop the absolute value sign in Coulomb's law.
4. Subtract the electric field due to one plate from the electric field due to the other plate to get the net electric field:
E = E1 - E2
E = 0
Since, the net electric field is zero, this means that the electric field due to one plate is equal in magnitude and opposite in direction to the electric field due to the other plate. Therefore, the plates must have the same magnitude of charge and opposite signs of charge density.
5. Since, one of the plates has a negative charge density is known, this means that the negative plate is the one facing us. Therefore, the negative plate is the one that we were asked to identify.
Therefore, the negative plate is the one facing us.
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