c or d
Explanation:
friction or conservation
3. Alice and Kai were playing air hockey, which is a game where players hit a puck with paddles so the puck slides across
a table. After the game, they were crashing the puck and two different paddles. The puck was the same in both crashes,
but the paddles were different: the red paddle had less mass, while the purple paddle had more mass. Use the
information in the diagram to answer.
In which crash did the puck experience a stronger force? Why?
The crash in which the puck experience a stronger force is Crash 2 because the force on the purple paddle was stronger in this crash, so the force on the puck was also stronger. That is option B.
What is force?Force is defined as the pull or a push that is experienced by an object when it passes through a distance.
According to Newton's second law of motion that states that the force on an object is equal to its mass times its acceleration.
Therefore, force can also be defined as the product of mass and acceleration. That is, F = mass× acceleration.
This shows that force is directly proportional to mass. Therefore increase in the mass of an object will require more force to bring about its movement.
Therefore, the purple paddle has a greater mass with a stronger force leading to a stronger crash.
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Complete question's options:
The puck did not experience a force; only the paddles experienced a force in the crashes.
Crash 2; the force on the purple paddle was stronger in this crash, so the force on the puck was also stronger.
The diagram doesn’t tell you anything about the force on the puck. It only gives information about the force on the paddles.
The puck experienced the same force in both crashes. The paddles changed speed by the same amount in each crash, so the force on the puck was the same each time.
A particle executing SHM along a straight line has a velocity of 4cm/s, when at a distance of 3cm from its mean position and 3cm/s, When at a distance of 4cm from it. Find the time it takes to travel 2.5cm from its mean position.
The time it takes to travel 2.5cm from its mean position is 1.048 secs.
Describe the mean position.When there is no net force exerted on the body, it is in the mean position, sometimes referred to as the equilibrium position. An oscillating particle's phase: This shows how the particle is vibrating right now.
Given,
case(1), V1=4ms−1,y1=3m,
case(II), V2=3ms−1,y2=4m.
We know that, V=ω√( a^2−y^2 )
Case (I) 4=ω√(a^2−3^2)..(i)
Case(II) 3=ω√(a^2−4^2) …(ii)
Dividing (i) by (ii) , we get
16a^2−256=9a^2−81
After solving we get,
a=√25 =5m
Substituting it in (i), we get
ω= 4 / 4 = 1 rads^−1
When the particle is 2.5 meters from the extreme location, its distance from the mean position is given by the equation x = 5−2.5 = 2.5m.
Given that SHM must note the time from an extreme point, we will apply the relation:
x=acosωt.
2.5= 5cos 1 × t = 5 cos t
=> cost = 2.5/5 = 1/2 = cos ( [tex]\pi[/tex]/3 )
=> t = [tex]\pi[/tex] / 3 = 22 /7 x 3 = 1.048 secs
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when trying to stop a car on icy pavement in as short a distance as possible, is it better to slam on the brakes and skid to a stop or apply the brakes more gently and roll to a stop?
Tapping the brakes is almost definitely going to be better than not tapping the brakes.
Using the brakes causes the static friction between your tires and the road to increase; which slows down the car more.
The issue is that when the grip between the brakes and the tire is too strong, the coefficient of friction between the tires isn't high enough to maintain that static contact. This is when the wheels "lock up" and begin to skid. As you mention, kinetic friction is less than static friction, so wheel lock and skidding should be avoided.
This means that tapping the brakes is generally the best braking method in these conditions, as compared to not braking at all.
When considering modern vehicles, your friend missed the mark even more. Most vehicles sold now (as far as I know) have an ABS, an Anti-lock Braking System which actually disengages the brakes when they reach the threshold when you start to lose traction. Basically, you can push down on the brake pedal as hard as you want, and you can feel the brakes start "tapping" on their own, to prevent skidding, increase traction, and allow you to brake in the lowest space possible. Tapping is the method most cars automatically employ on icy surfaces, and if you try it for yourself (in a controlled environment), you will find that tapping the brakes should slow you down a lot faster than not pressing it at all; especially if you avoid skidding.
Hence,
Tapping the brakes is almost definitely going to be better than not tapping the brakes.
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This is easy but help
1. Distance covered 200 Meters
2. Displacement 100 Meters
3. Displacement from starting position 0 Meters
What is Distance?Distance is the sum of an object's movements, regardless of direction. Regardless of an object's starting or ending position, distance can be defined as the amount of ground it has covered.
Displacement: What is it?Displacement refers to the idea that something has moved or been shifted. The term "displacement" refers to a shift in an object's position.
According to the given information;Solution.1 -Natasha sprints 100m and walks back to the starting position 100m. 100m+-100m= - 200m
Therefore, the answer is 200
Solution.2 - Natasha sprints towards finishing line 100m then her displacement is 100m from starting line.
Solution.3 -Natasha sprints 100m towards Finishing line then walked back to starting line then her displacement is
100m - 100m =0 meters
Therefore the answer is 0 meters
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8. Which statements are true about why wind tends to blow from over the water to over the land on a sunny day? Highlight all the statements that apply.
A. Air over the water is cooler than air over the land is.
B. The air above the land has greater density.
C. The wind is caused by differences in density.
D. Cool, dense air from over the water flows toward the land, pushing warm air upward.
Wind tends to blow from over the water to over the land on a sunny day because air over the water is cooler than air over the land is, the wind is caused by differences in density and the cool, dense air from over the water flows toward the land, pushing warm air upward. Making option A, C, and D the right answer to the question.
What is sea breeze?
The phenomenon where wind tends to blow from over the water to over the land on a sunny day is referred to as sea breeze.
The heat from the sun heats up the faster than water. Subsequently, air over land heats up faster than air over water, thus air above land becomes lighter causing the pressure to decrease.
In summary, Option B is wrong because the air above the land has a lesser density compared to the air above the water, and this is due to the characteristics of the wind blowing from a higher pressure area to a lower pressure area.
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a block with mass m1 is placed on an inclined plane with slope angle α and is connected to a second hanging block that has mass m2 by a cord passing over a small, frictionless pulley. the coefficient of static friction is μs and the coefficient of kinetic friction is μk
The mass m2 for which block m1 moves up the plane at constant speed once it is set in motion is:
m2 = m1 (sinα + μkcosα)
The tension in the cord should be [tex]m_{2}[/tex]g so the that the hanging block over a frictionless pulley can move at constant speed. This tension in the cord should the component of gravitational force and the force of friction.
Now
[tex]m_{2}[/tex]g = ([tex]m_{1}[/tex]g(sinα) +μk([tex]m_{1}[/tex]g)cosα)
[tex]m_{2}[/tex]g = [tex]m_{1}[/tex]g(sinα +μkcosα)
[tex]m_{2}[/tex] = [tex]m_{1}[/tex] (sinα + μkcosα)
So the mass [tex]m_{2}[/tex] for which m1 moves up the plane at constant speed once it is set in motion is:
m2 = m1 (sinα + μkcosα)
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A 1.20-kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 3.0 meters per second2 . Calculate the magnitude of the net force exerted on the frog as it leaps.
Force is the product of mass and acceleration, the magnitude of the net force exerted on the frog as it leaps is 3.6 N
What is Force ?Force can be simply defined as a pull or push. It is the product of mass and acceleration. And it is measured in Newton.
Given that a 1.20-kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 3.0 m/s² . The magnitude of the net force exerted on the frog as it leaps will be
F = ma
Where
m = 1.2 Kga = 3 m/s²Substitute the two parameters into the formula.
F = 1.2 × 3
F = 3.6 N
Therefore, the magnitude of the net force exerted on the frog as it leaps is 3.6 N
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a railcar with an overall mass of 72,000 kg traveling with a speed vi is approaching a barrier equipped with a bumper consisting of a nonlinear spring whose force vs. compression law is given by fs
According to Hooke's law, the applied force F equals the displacement or change in length x multiplied by a constant k, or F = kx. The value of k is determined not only by the elastic material, but also by its dimensions and shape.
What is the force definition of compression?When a physical force presses inward on an object, compression force causes it to become compacted (or compressive force). During this process, the relative positions of the object's atoms and molecules change.
F = P/A is the compressive strength formula, where F is the compressive strength (MPa) P=The maximum load (or load until failure) of the material (N) A=A cross section of the load-bearing material's area (mm2).
When the force of compression exceeds an object's ability to withstand it, buckling occurs.
The relationship between force and a measurable property of the objects involved is expressed by a force law. Some interactions can be described by force laws, while others cannot.
There are forces that do not change significantly from one instant to the next and are referred to as constant in time and constant in space.
Hence, Hooke's law states that the applied force F equals the displacement or length change x multiplied by a constant k, or F = kx. The value of k is determined not only by the type of elastic material in question, but also by the temperature.
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Iridium is a substance found only in asteroids and other space objects. This graph shows the amount of Iridium found in different sediment layers of Earth. They are marked off into 17 sections representing time.
Iridium Levels graph shows Iridium levels in sediment layers. Beginning at sediment layer 1, iridium levels remain between 0 and 5, jumping to a level of 23 between layers 5 and 6, and decreasing to near starting levels at layers 14 through 17.
What most likely happened in sediment layer 5?
A massive volcano erupted, causing global warming and lava flow, which in turn caused mass extinction.
More iridium was produced by space objects and dumped by local factories.
The impact of a space object led to the deposit of a layer of sediment high in iridium.
Fewer impacts lead to a drop in iridium levels and a mass extinction caused by a lack of sunshine.
The most likely thing that happened in the sediment layer 5 is that A. The massive volcano erupted, causing global warming and lava flow, which in turn caused mass extinction.
What is the information about?The element iridium is only present in asteroids and other outer space objects. The amount of iridium present in various Earthly sediment layers is depicted an divided into 17 portions to illustrate the passage of time.
Iridium is a plentiful element in outer space, especially in asteroids. The Alvarez Hypothesis provides support for this response. The most potent nuclear bomb ever exploded only released a fraction of the energy that a large asteroid that struck the earth would have.
Global flames caused by this heat made the earth completely dark.
The creation of a dust cloud was the cause of this obscurity. The lack of sunshine also caused the vegetation to disappear, which in turn led to a global extinction.
In conclusion, the correct option is A.
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This is the 6th question. other 5 questions in a different one. will mark brainliest. need asap. thank you
The acceleration of an object is directly proportional to the force applied and inversely proportional to its mass.
If the same force is used to move all four masses, they will experience the same different accelerations since their masses differ.
According to Newton's second law, the greater the force used to throw the ball, the greater the ball's acceleration.
If forces, F, are equal, the acceleration of the wagons should be different.
If force, F, is the same for both cars, then you know the mass of Car A is less than the mass of Car B.
To move the wagons at the same speed you must use a much greater force, F on the bottom wagon because it has a greater overall mass.
What is the relationship between the force, mass, and acceleration of an object?According to Newton's second law of motion, the acceleration of an object is directly proportional to the applied force and inversely proportional to the mass of the object.
Therefore, the greater the mass of an object, the greater will be the force required to produce the acceleration as in an object of smaller mass.
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Using energy considerations, calculate the average force a 60. 0-kg sprinter exerts backward on the track to accelerate from 2. 00 to 8. 00 m/s in a distance of 25. 0 m, if he encounters a headwind that exerts an average force of 30. 0 n against him.
Answer:
−102 N
Explanation:
Hope this helps.
What does mass of an object depend on
Answer:
the inertia of an object
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The chemical equation shown below is not balanced (it does not follow the Law of Conservation of Matter).
The answer is 2 because the Hydrogen atom on the right needs 2 to balance with the one on the left
An A. C is supply is
Connected accross a Capacitor
of 5 nf R=50_n in series at 50ttz find the;
Capacity rectance
Pedance
Supply Current
Vortage a cross the capacity
Answer:
d
Explanation:
little girl tosses an apple up toward a boy in a tree with an initial velocity of 8.50 m/s at 72o.
A. What is the maximum height reached by the apple
The maximum height reached by the apple thrown with an initial velocity of 8.50 m / s at 72° is 6.65 m
H = u² sin²θ / g
H = Maximum height
u = Initial velocity
g = Acceleration due to gravity
u = 8.5 m / s
g = 9.8 m / s²
θ = 72°
H = 8.5² sin² ( 72° ) / 9.8
H = 72.25 * 0.9 / 9.8
H = 6.65 m
If an object is thrown with an initial velocity at angle with the ground, it will move in a projectile motion. The object thrown is called as a projectile.
Therefore, the maximum height reached by the apple is 6.65 m
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at what times t is the turtle a distance of 10.0 cm from its starting point? what is the velocity (magnitude and direction) of the turtle at each of those times?
neglecting air resistance, after a rock thrown straight up reaches the top of its path and then falls a short distance, its acceleration is group of answer choices more than at the top of its path. the same as at the top of its path. less than at the top of its path.
if a rock is thrown straight up and falls, then its acceleration is the same as at the top of its path and it is equal to g, the gravitational acceleration.
If an object is moving straight vertically, the acceleration is constant along its trajectory, either it moves upward or downward. It is the velocity that changes.
If the object is moving upward, the velocity decreases, until at the top position, the velocity is equal to zero. The acceleration is constant and it is equal to g, the gravitational acceleration.
v(t) = vo - gt
Where:
v(t) is the velocity at time t
vo is the initial velocity
If the object is moving downward, the velocity increases. Again, the acceleration is constant and it is equal to g, the gravitational acceleration.
v(t) = vo + gt
This situation is depicted on the attaches picture.
Hence, if a rock is thrown straight up and falls, then its acceleration is the same as at the top of its path and it is equal to g, the gravitational acceleration.
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Who did experiments with light , known as the double-slit experiments, to produce interference patterns that could only be explained by evoking a wave-like nature for light?.
Thomas Young did the experiments with light , known as the double-slit experiments, to produce interference patterns that could only be explained by evoking a wave-like nature for light.
What is the double-slit experiment?
Thomas Young an English physicist, was the first to perform the double slit experiments. The experiment involved passing light through two tiny slits, thereby producing an interference pattern that could not be reconciled with the corpuscular view of light. Thus, the findings of Thomas Young supported the hypothesis that light consists of waves rather than particles.
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3. Find the resultant of the following two displacements 2m at 30⁰ and 4m
at 120⁰. The angles are taken relative to X - axis.
2m
K.
30⁰
4m
600
120°
The resultant of the two displacements 2m at 30⁰ and 4m
at 120⁰ is 93.4 degree.
Describe displacement.Displacement is the process of removing something from its usual location or position and substituting another object in that space.
Given: The sum of the displacements at 30 degrees and 120 degrees, respectively, is 2 meters.
Currently, there are two displacements, which
R1 = 2 cos 30 – 4 cos 60
= 2 x √3 / 2 – 4 x 1 / 2
= √3 - 2
= 1.732 - 2
= - 0.268 m
R2 = 2 sin 30 + 4 sin 60
= 2 x 1/2 + 4 x √3 / 2
= 1 + 2 √3
= 1 + 2 (1.732)
= 1 + 3.464
= 4.464 m
Now R = √R 1^2 + R2^2
= √(-0.268)^2 + (4.464)^2
= √0.0718 + 19.927
= √19.999
= 4.472 m
Now tan Q = R 2 / R1
= 4.464 / - 0.268
= - 16.656
Or Q = - 86.6 degree
Now the outcome will be 180 – 86.6 = 93.4 degree
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how much work is required to lift a 360 kilogram piano to a window whose height is 10 m from the ground
So, the work required to lift the piano is 36 kJ from the ground.
What connection exists between energy and work?An item needs to receive energy in order to move. Force is one way that energy may be transferred. Work or work done refers to the quantity of energy used by a force to move an item.
Transferring energy into an item to cause some displacement is what is referred to as work. The ability to perform tasks is referred to as energy. The work is consistently the same. Kinetic and potential energy are two examples of the various forms of energy.
The quantity of internal and mechanical energy that things contain fluctuates as a result of work. Energy is contributed to a system or an item when work is done on it. When a system or thing performs labour,
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PLS HELP, I DIDN'T KNOW THIS WAS DUE UNTIL I CHECKED-AND IM WORKING ON MY OTHER 5 HOMEWORK ASSIGNMENTS, SO I DONT HAVE TIME TO DO THIS!!! I just need the answers you don't need to go into full detail! I'LL GIVE BRAINLIEST!!!
Proton has positive charge whereas neutron has no charge.
What are the difference between a proton and neutron?Proton is a type of subatomic particle that has a positive charge whereas Neutron is a type of subatomic particle that has no charge.
An atom that has lost one or more number of electrons is known as anion.
Isotopes is defined as an element that have the same number of protons i.e. atomic number but different numbers of neutrons i.e. mass number.
Electron is located outside the nucleus of an atom.
Fluorine is that atom which has 9 number of protons so its atomic number is 9.
Atomic number is related to the number of particles in the nucleus of an atom because in the nucleus, proton is present which shows the atomic number of an atom.
There are three parts of an atom i.e. proton, electron and neutron.
The size of electron is about 2 × 10⁻¹⁰ cm, The size of proton is about 0.84×10⁻¹³ cm and the size of neutron is about 1.7×10⁻¹⁵ meters
Electron has negative charge, proton has positive charge and neutron has no charge.
Yes, we can tell about the element if we know about the charge and the number of electrons in it because different atoms has particular number of electrons.
The diameter of a nucleus in scientific notation is 1.6 x 10⁻¹⁵.
The mass of hydrogen atom in whole number is 0.00000000000000000000000000167.
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What is the name of the seismic wave that is the first to occur during an earthquake? A. S wave B. Surface wave C. P wave
P waves are first to occur during an earthquake.
There are two types of earthquake waves based on the medium of travel.
1.Body waves- these waves travel through the solid part of earth crust.
2.Surface waves- these waves travel on earth's surface.
Body waves are divided into two types of waves i.e., P waves (primary) and S waves (secondary).
1.P waves (primary waves)- these are the fastest seismic waves which travel through the earth crust. P waves are the first waves to reach any location when an earthquake occurs.
2.S waves (Secondary waves)- these waves are second fastest waves after primary waves to reach a location when the earthquake occurs. S waves have half speed than that of P waves.
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a 1,900-kg pile driver is used to drive a steel i-beam into the ground. the pile driver falls 4.80 m before coming into contact with the top of the beam, and it drives the beam 13.4 cm farther into the ground as it comes to rest. using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest.
The average force of the beam expert is 648,365.
What is average force?The force delivered to a body traveling at a specific speed for a specific amount of time is known as the average force. Since it possesses both momentum and direction, it is primarily a vector quantity. It differs between momentum and net force.
Average force is the force exerted by a body moving at a specific speed for a specific amount of time.
mass of pile driver (m) = 1900 kg
distance of pile driver to steel beam (s) = 4.80m
depth of steel driven (d) = 13.4= 0.134 m
acceleration due to gravity (g0 = 9.8 m/s^{2}
calculate the average force exerted on the pile driver by the beam.
from work done = force x distance
work done = change in potential energy of the pile driver
equating the two equations above we have
force x distance = m x g x (s - d)
f x 0.134= 1900 x 9.8 x (4.80- (-0.134))
d = - 0.134because the steel beam went down at we are taking its
initial position to be an origin point which is 0
f = ( 1900x 9.8 x (4.80- (-0.134)) ) ÷ 0.134
=648,365
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3) A kid finds a super creepy doll and immediately chucks it off a cliff that is 72 meters high. The
super creepy doll flies 51 meters before it hits the ground. DRAW A PICTURE.
A) How long does it take for the super creepy doll to hit the ground?
B)At what horizontal velocity did the kid throw the doll
It takes 13.22 m/s as the horizontal velocity with which the kid throw the doll and the doll takes 3.77 seconds to hit the ground.
What is velocity and how it comes out to be 3.77 m/s ?As studied earlier the velocity is the change in the displacement per unit time of the object.Here it is given that the cliff is 70m high. And the doll flies 51 meters before it hits the ground.The flight edge 70m x 50m , using second equation of motion we can clearly see the displacement is equal to initial velocity.Accordingly putting in equation , {2x70/9.8}^1/2 and this will come out to be 3.77 seconds.For finding horizontal velocity using second equation of motion, from here we can say that the initial horizontal velocity is 13.22 m/s with which the kid threw the doll.To know more about velocity visit:
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Pls solve answer with explanation.. physics problem
Answer:
9Ms correct answer ???????????//?
if length of a wire is doubled keeping the diameter constant ,its young modulus of elasticity will?
i) increases
ii)decreases
iii)remains same
iv)depends on nature of matter
Answer:
Explanation:
Young's modulus is the property of the material and it does not depend upon the length or the area of the cross-section.
Hence, The most correct answer will be option (iii) but youngs modulus also depends upon the nature of the matter if you have to answer multiple option then (iii) and (iv) both are correct. If you have to answer only single option then go for option (iii).
A blimp is travelling above the surface of Jupiter at a height of 3.9km. Assuming g on Jupiter is 24.5N/kg, find the mass of the blimp if its gravitational potential energy store is 2.8MJ.
Explanation:
what does kinetic theory of matter state
determine the minimum coefficient of static friction μs which will allow the drum with fixed inner hub to be rolled up the 15° incline at a steady speed without slipping. what are the corresponding values of the force p and the friction force f?
The ratio of the greatest static friction force (F) between the surfaces in contact before movement starts to the normal force (N) is known as the coefficient of static friction.
Create an inclination plane out of one of the materials, then place a body made of the other material on it to determine the minimum coefficient of static friction between the two. Up until the body begins to slide, steepen the incline. The coefficient of friction is the angle's tangent.
A body of mass m experiences both a horizontal and a vertical component of gravity when you increase the incline.
Applying Newton's Law to each of them right before the body begins to move reveals that Fx = max is the value for the horizontal component, which acts in the x-direction.
The same holds true for the y-axis: Fy = may.
F on one side and umg on the other will exert forces on the body of mass "m."
Write the formula as F-umg=ma.
In the direction F is acting, the force on mass "2m" will be umg. (Observe how the frictional force acts on mass "m" on the left side and mass "2m" on the opposite side.)
Formula: umg=2ma
The acceleration of both bodies should be the same for a no-slip condition; to find the solution, simply substitute the acceleration from equation (2) into number 1.
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What electric field e′ would have been required to create a current of 30. 0 amperes in a copper gauge 10 wire with diameter d equal to 0. 259 centimeters?.
The required electric field is 9.58 × 10⁻² N/C
We know that the electric field, E is a product of resistivity and current density
∴ E=jρ ......(i)
Where ρ⇒ Resistivity
j ⇒ Current density
j = I/A
Now, as per the question,
Resistivity of copper, ρ = 1.68 × 10⁻⁸ Ωm
Current, I = 30 ampere
Diameter = 0.259 cm = 0.00259 m
So, Radius, r = Diameter/2
= 1.295 × 10 ⁻⁴m
Now, Cross-sectional area, A = πr²
= 3.14 × (0.001295)²
= 5.26 × 10⁻⁶ m²
Putting the values in equation (i), we get:
[tex]E = 1.68 \times 10^{-8} \times\frac{30}{5.26 \times 10^{-6} }[/tex]
[tex]E= 9.58 \times 10^{-2} N/C[/tex]
Therefore, the required electric field is 9.58 × 10⁻² N/C
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What element is shown below?