On the premise that consumers will be prepared to pay more in exchange for using less energy, energy efficiency measures are based.
What do you think of the American Council for an Energy Efficient's strategy?Energy efficiency policies, programs, technologies, investments, and habits are advanced by ACEEE through research and outreach. In the future, we want energy efficiency to contribute to the US's economic success, energy security, and environmental sustainability.
How is utilizing multiple policy instruments more effective than use just one?How is utilizing multiple policy instruments more effective than use just one? Wider coverage is possible when many policy instruments are used. Cotton was created by Eli Whitney.
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Label the spinal cord meninges and spaces. 02:00:12 Skipped Reset Zoom Subarachnoid Arachnoid mater Dura mater Subdural Pia mater space space 7
The label from superficial to deep, of meninges and their related spaces in the correct order are:
1. Dura mater
2. Subdural space
3. Arachnoid mater
4. Subarachnoid space
5. Pia mater
What is the proper sequence of the meninges, from the superficial to the deep?The brain and spinal cord are shielded by three layers of membranes called meninges. Pia mater is the thin inner layer. The arachnoid, a structure resembling a web and filled with fluid, is the middle layer and protects the brain. The durable outer layer is known as the dura mater.
The subdural space is the area that could be found between the arachnoid mater and the meningeal layer of the dura. The subdural space typically only exists in pathological conditions, similar to the epidural space.
Therefore, Between the dura mater of your spinal cord, the bones of your vertebral column, and the dura mater of your skull is a space called the epidural space.
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the normal component of the magnetic flux density remains continuous across the boundary between two magnetic media
Across the border, the normal component of the flux density is constant. The strength of the tangential field is the second boundary condition, which is B1n = B2n.
Magnetic flux is it constant?Conclusion. In a continuous loop perpendicular to the motion of the electric dipoles in the magnetic material, the magnetic flux is constant and happens. Due to the conductor's constant area and varying magnetic field, the magnetic flux may change.
What is the boundary condition for E across the media interface?There could be a surface charge density at the boundary between two materials. The normal components of the electric field are discontinuous and equal to the surface charge density at the boundary between any two dielectrics, while the tangential components are continuous.
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A long, horizontal wire Ab rests on the surface of a table and carries a current I. A horizontal wire CD is vertically above wire AB , and is free to slide up and down on the two vertical metal guides C and D ( as shown in Fig) .Wire CD is connected through the sliding contacts to another wire that also carries a current I , opposite in direction to the current in wire AB . The mass per unit length of the wire CD is λ. To what equilibrium height h will the wire CD rise. assuming that magnetic force on it is wholly due to current in wire AB ?
The equilibrium height to which the wire CD will rise is given by the expression h = μ₀I² / 2π λg
What is magnetic field ?A region in which the force of magnetism acts is known as the magnetic field, and it surrounds magnetic materials or a moving electric charge. Moving magnetic dipoles and electric charges produce a magnetic field, which acts as a force field on other nearby magnetic dipoles and moving charges.
Magnetic field at a distance h produced by a current carrying wire
B = μ₀I/ 2πh
Magnetic force due to the present current carrying wire can be calculated by the formula
F = B I L
And we also know that F = mg
On equating these mg = B I L
( μ₀I/ 2πh ) I = ( m/ I ) g = λg
thus we get the value of h as
h = μ₀I² / 2π λg
Thus, the equilibrium height to which the wire CD will rise is given by the expression h = μ₀I² / 2π λg .
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a student in an electronics lab is studying the electrical properties of pieces of graphite
A cylindrical bit of graphite with a radius of 0.7 mm is subjected to a potential differential of 24 V along its length by the student.
What use does graphite serve?Pencils, lubricants, crucibles, casting facings, polishes, arc lights, batteries, electric motor brushes, and nuclear reactor cores all include graphite. China, India, Brazil, N.korea, and Canada all mine large amounts of it. Graphite was inadvertently created for the first time by Edward G.
What is distinctive about graphite?It is special in that it possesses traits common to both metals and non-metals, including flexibility without being elastic, high thermal and electrical conductivity, high refractoriness, and chemical inertness. Due to its low X-ray and neutron absorption, graphite is a particularly useful material.
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you have three light bulbs; bulb a has a resistance of 240 q, bulb b has a resistance of 192 q, and bulb c has a resistance of 144 q. each of these bulbs is used for the same amount of time in a setup like that in the drawing. in each case the speed of the rod and the magnetic field strength are the same. rank the setups in descending order, according to how much work the hand in the drawing must do (largest amount of work first).
The correct sequence will be: A, B, C
Given,
Resistance A = 240 Ω
Resistance B = 192 Ω
Resistance C = 144 Ω
We know that the resistance has relations with Current (I) and Voltage (v)
But to find the work done by the hand,
We will apply the formula of the work,
W = VIt
Replacing V with R/I
Work = (R/I)*I*t
Work= R*t
The time given is same.
So here,
Work = Resistance,
By this derivation, the highest resistance will do the highest amount of work.
Therefore, the work done by Resistance A will be the most and then the work by resistance B and then the work by resistance C.
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PLS HELP I ONLY HAVE 2 MINUTES PLEASE ONLY ANSWER IF YOU KNOW THE RIGHT ANSWER
_____ are the main form of fuel that is burned today in automobiles, industrial plants, and homes.
Carbon Monoxides
Nitrogen Oxides
Sulfur Oxides
Hydrocarbons
Answer:
Hydrocarbons
Explanation:
quizlet
what is mesothermal climates
Answer:
Mesothermal regions have moderate climates. They are not cold enough to sustain a layer of winter snow but are also not remain warm enough to support flowering plants (and, thus, evapotranspiration) all year.
Explanation:
Please give the brainliest.
how is einstein's famous equation, e = mc2, important in understanding the sun?
The correct answer is option D) the Sun generates energy to shine by losing 4 million tonnes of mass each second.
What is sun ?
The Sun, a 4.5 billion year old yellow dwarf star and the centre of our solar system, is a hot, glowing ball of hydrogen and helium. It's about 93 million miles (150 million kilometers) from Earth and it's our solar system's only star. The sun is not a solid mass. It does not have easily identifiable boundaries like rocky planets like Earth. Instead, the sun is composed of layers made up almost entirely of hydrogen and helium.
It explains the fact that the Sun generates energy to shine by losing some 4 million tonnes of mass each second. The "lost" 4 million tonnes is turned to an amount of energy equal to this mass times the speed of light squared.In order to produce the energy we see it produce, the Sun needs to fuse 4 × 1038 protons into helium-4 per second. The upshot of that fusion is that 596 million tonnes of helium-4 are formed with each second that passes, while 4 million tonnes of mass are turned into pure energy via E = mc2.
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Crane with 5 kW motor lifts the load evenly at a speed of 0.1 m/s. What is the weight of the cargo?
Answer: 0.5
Explanation:
an ice hockey puck is tied by a string to a stake on rough ice and slides around in a circle until it comes to a stop. what is the sign of the work done by the tension in the rope as it slides to a stop?
The rope slides to a stop with no work being done by the tension in the rope.
Which of Newton's equations of motion best describes how a hockey puck would move if there was no external force acting on it as it slid around the ice?first rule of Newton If not affected by a net external force, an item at rest or in motion maintains its state of motion at a constant speed.
A hockey puck striking is governed by what rule of motion?The First Law of Motion by Newton Ice hockey is a sport that can help us understand Newton's laws of motion. Until pushed to change its condition by a net force, an object stays at rest or moves at a constant speed (speed in a constant direction).
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the solid dot shown in the figure below is a pivot point. the board can rotate about the pivot.
The torque due to perpendicular force will be greatest.
Torque is the measure of the force that can cause an object to rotate about an axis. Force is what causes an object to accelerate in linear kinematics.The unit of torque is Newton–meter (N-m) A simple way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force.It is a vector product hence torque also must be a vector. Using vector product notations we can find the direction of torque.We know that Torque = mass * velocity * sinα
where α = angle between mass and velocity.
For maximum torque, sinα = 1 ; i.e. α = 90°.
So the torque due to perpendicular force will be greatest.
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The compound dinitrogen oxide is a gas at room temperature. The two elements found in a sample of this gas
The two elements found in a sample of compound dinitrogen oxide, which is a gas at room temperature are nitrogen and oxygen.
What is dinitrogen oxide?Dinitrogen oxide or nitrous oxide is commonly known as laughing gas,
Dinitrogen oxide is a chemical compound, an oxide of nitrogen with the formula N₂O.
At room temperature, this gas is colorless, non-flammable gas, and has a slightly sweet scent.
Dinitrogen oxide or Nitrous Oxide is also called laughing gas or happy gas due to its intoxicating effects when inhaled.
From the chemical formula of Dinitrogen oxide which is written as;
N₂O = two nitrogen atoms and on1 oxygen atom
The compound of Dinitrogen oxide is made of;
2 atoms of nitrogen and 1 atom of oxygen
Thus, the compound of Dinitrogen oxide which is a gas at room temperature is made of two element. These two elements contained by the gas sample are known as nitrogen and oxygen.
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Answer:
nitrogen and oxygen.
Explanation:
the reason is cause i got it right
Based on observations, which of the following statements about stars in the Milky Way is generally true?
The older the star, the lower its abundance of heavy elements.
The less massive the star, the older it is.
The older the star, the bluer its color.
The older the star, the faster its orbital speed.
The younger the star, the higher its mass
Stars in the Milky Way, the older the star, the lower its abundance of heavy elements.
An element is a substance that can not be damaged down into a simpler layout. They may be distinguished by means of a completely unique atomic range. The elements are organized via their atomic variety in the periodic table, which highlights elements with similar residences.
Carbon is the most important detail of existence. Without this detail, existence, as we are aware of it, might not exist. As you will see, carbon is a vital element in compounds essential for lifestyles.
Kinds of elements :
1.) The elements are categorized as metallic, non-metal, and metalloid.
2.) The intense left aspect factors inside the periodic desk are metals, for example, sodium, calcium, cesium, and many others.
3) Elements such as non-metals, carbon, chlorine, oxygen, and many others.
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FILL IN THE BLANK. power supplies all provide the same voltages to a system, such as 3.3v, 5v, and 12v. each of these can be referred to as a___, because each one comes from a specific tap within the power supply.
Linear regulated because each one comes from a specific tap within the power supply.
What are the four power supply stages?The four main processes shown in a block diagram of a regulated DC power supply are step down transformation, rectification, DC filtration, and regulation. Unregulated power supply and regulated power supply are the two categories that define DC power supply designs. The controlled power supply can be switched or linearly regulated.
What three types of power supplies are there?Battery-based, switched, or linear? Regulated power sources can be divided into three categories: battery-based, switching, and linear. Although switching and battery power have advantages, linear is the least complex of the three fundamental regulated power supply systems.
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After taking a hot shower, James steps out of the shower onto the tile floor. The tile felt cold to his feet. Which explanation below best describes James' experience?A.Heat from his feet is transferred to the tile floorB.Heat from the tile floor is transferred to his feetC.Cold from the tile floor is transferred to his feetD.Cold from his feet is transferred to the tile floor
The tile felt by James through his feet is due to the phenomenon on conduction. A) The heat from his feet gets transferred to the cooler tile.
When two objects are touching, and the objects each have a different temperature, then there is a transfer of energy from the hotter to the cooler one. You experience conduction throughout your day. For example, conduction explains why a tile floor feels cold on your feet (the energy from your warm foot is being transferred to the cooler tile floor) or an item taken from a freezer feels cold in your hands (the energy from your warm hand is flowing toward the item you took from the freezer).
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6. suppose you apply a force of 1 n to block a and a force of 2 n to block b. does it follow that block b must have twice the acceleration of block a? justify your answer using newton's second law.
Yes, block b must have twice the acceleration of block a but Only if B has the same mass as A.
Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.
Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.
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what does a frequency of recombination of 50 indicate
A frequency of recombination of 50% indicates that the genes are independently assorting.
Describe the gene?A gene is known as the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. In humans, it is known that genes vary in size from a few hundred DNA bases to more than 2 million bases.
A frequency of recombination of 50% indicates that the genes are independently assorting which means that the inheritance of alleles at the two loci are independent. If the recombination frequency is less than 50% we say the two loci are linked.
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shows two blocks connected by a cord (of negligible mass) that passes over a frictionless pulley (also of negligible mass). The arrangement is known as Atwoods machine. One block has mass m1 "1.30kg;the other has mass m2 " 2.80kg.What are (a) the magnitude of the blocks acceleration and (b) the tension in the cord?
The block's acceleration is 3.585 m/s^2, while the cord tension is 17.4 N. depicts two blocks attached by a cord (of minimal mass) that crosses a frictionless pulley.
A block weighs 1.30 kg per m1.
A 2 m2 block weighs 2.8 kg.
Block-block system acceleration = a
T is equal to the cord's tension.
The acceleration of block 1 in our coordinate systems is equal to the acceleration of block 2 in our coordinate systems. So, using a common acceleration, we can express them. These are the motion equations:
T = m1*g - m1*a and M2*g - T
We obtain the equation of motion for the entire system by combining the two equations.
(m1+m2)
*a = m2*g-m1*g
The acceleration is given by the equation a = (m2-m1)*g/(m1+m2), a = (2.8-1.3)9.8/(1.3+2.8), and a = 3.585 m/s2.
T = m1*(a+g) T = 1.3(3.585+9.8) T = 17.4 N is the outcome after plugging it into block 1's equation of motion.
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A bullet of mass 7.5 g that is moving at a speed of 483 m/s embeds itself into a tree, penetrating 19.4 cm into the wood.What is the magnitude of the average force, in N, exerted by the tree on the bullet? sig.gif?tid=4T78-AC-85-4A-844D-22357F =
The average force by which the bullet will hit the tree is F = 4.50945 × [tex]10^4[/tex] N .
Given : mass of the bullet = 7.5 gram
u or intial velocity = 483 m/s
v or final velocity = 0 m/s
h or height = 19.4 cm
v² = 2as + u²
0 = 38.8 a + 483 × 483
- 483 × 483/ 38.8 = a
thus acceleration = 6012.6 m/s²
F = ma
Thus on substituting the values we get
F = 7.5 × 6012.6
F = 45,094.5 N
or
F = 4.50945 × [tex]10^4[/tex] N
The magnitude of the average force is F = 4.50945 × [tex]10^4[/tex] N .
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TRUE/FALSE. initial discovery of radioactivity and how it was thought to be the same as another type of light energy emission
Initial discovery of radioactivity and how it was thought to be the same as another type of light energy emission is true statement.
Henri Becquerel made the initial discovery of radioactivity. She investigated the characteristics of x-rays, which Wilhelm Roentgen had discovered in 1895, using naturally fluorescent minerals. In the belief that the uranium would absorb the sun's energy and then release it as x-rays, he placed potassium uranyl sulphate on photographic plates covered in black paper and exposed them to the sun.A study released earlier this month by the Global Carbon Project (GCP), a team of scientists who monitor emissions, predicts that CO2 emissions will increase by 4 point 9 percent in 2021 compared to the previous year.
Due to the COVID-19 pandemic and related lockdowns, emissions decreased by 5 point 4 percent in 2020.
With a 40% share and increasing, the energy sector remains the main source of greenhouse gas emissions.
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Two carts on an air track have the same mass and speed and are traveling toward each other. If they collide and stick together, find the total momentum and total kinetic energy of the HINT (a) the total momentum O The final momentum is zero. The final momentum is half the initial momentum. O The final momentum is twice the initial momentum. O There is not enough information to tell. (b) the total kinetic energy O The final kinetic energy is zero. OO The final kinetic energy is half the initial kinetic energy. The final kinetic energy is twice the initial kinetic energy. O There is not enough information to tell. (c) Describe a different colliding system with this same final momentum and kinetic energy.
if they collide and remain united then the. Total momentum of the system is zero.
Total momentum by using the Principle of Momentum Conservation.
mVa-mVa=2Vb
final speed and total momentum of system =zero
p=0
Due to the inellastic impact and the same masses and speeds, the system's total kinetic energy is reduced to zero. Before and after a collision, the total kinetic energy are, respectively:
Ka=mv^2
Kb=0
Momentum is the result of a particle's mass and velocity. A vector quantity with both magnitude and direction is momentum. Isaac Newton's second equation of motion states that the force applied to a particle is equivalent to the time rate of change of momentum.
Any grouping of particles has a momentum equal to the vector sum of their momenta. A modification in one particle's momentum is perfectly balanced by a modification in the momentum of another particle, according to Newton's third law, which states that particles exert equal and opposite forces on one another.
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a stone is thrown horizontally from the top of a cliff 30m high with an itinal sped of 20, find the vertical speed of the stone as it hits the groudn
The molar mass of sulfur hexafluoride is 146 g/mol.
13. g of sulfur hexafluoride = 13 g / 146g/mol = 0.089 mol
The pressure of sulfur hexafluoride
P = nRT / V
P = 0.089 mol x 0.08206 Latm/mol/k x (10.0 + 273.15)K / 5.0 L
P = 0.41 atm.
The rate of change in position of an object in any course. Speed is measured because the ratio of distance to the time wherein the distance became included. Speed is a scalar amount because it has handiest route and no significance.
Velocity can be notion of as the rate at which an object covers distance. A quick-moving object has a high speed and covers a notably big distance in a given amount of time, whilst a sluggish-shifting item covers a relatively small amount of distance in the same amount of time.
The primary unit or the S.I. unit of velocity is m/s or ms¹.
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Problem 12.41 9 of 9 Review A 50 g mass rotates in a vertical plane--call it the xy-plane with the y-axis pointing up--at the end of a 75-cm-long, massless, rigid rod. The other end of the rod is attached to a frictionless pivot at the origin. Part A What is the gravitational torque about the pivot when the mass is 60° above the +x-axis? Give your answer using unit vectors. Express your answer in newton-meters. Enter components of torque, separated by comma. IVO AE ? Tx, Ty,Tz = N·m Submit Request Answer
The value of gravitational torque after solving the expression will be equal to -0.18375 N.mz.
What is Torque?The rotating equivalent of a force in physics or mechanics is called torque. Depending on the topic matter, it may also be referred to as the moment, point in time of force, rotating force, or turning effect. It symbolizes a force's capacity to cause a change inside the bodies natural rotational motion.
As per the given information in the question,
Mass, m = 50 g
Length, l = 75 cm
Gravitational force, [tex]\vec F[/tex] = -mgy
Then, the position vector of the particle will be,
[tex]\vec \tau[/tex] = l(cos 60° x + sin 60° y) × (-mgz)
= -0.18375 N.mz
Therefore,
[tex]\tau_x, \tau_y,\tau_z=0, 0, -0.18375[/tex]
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a. What are the defects of simple cell?
a block is pulled along a surface of negligible friction by a spring scale that exerts a force f on the block. the mass of the block is 4kg, and the spring scale reads 10n. which of the following free-body diagrams can be used to show the magnitude and direction of all the forces exerted on the block as it is pulled along the surface?
The correct free-body diagram is the one shown in option C
What is the correct free-body diagram?We know that the free-body diagram could be used to identify the forces that are acting on an object. We know that the normal force that acts on an object must be equal to the weight of the object and this is represented as lines of equal length on the free-body diagram.
We can now see that the correct free-body diagram is one in which the magnitude of the force weight and the normal force is the same. Now the force on the spring would be shown as the forward force.
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What can I do to make this less expensive, with less cargo damage, and with a sturdy shell condition? Anything less than the amount shown in the image.
The external part of the shell is made of fiberglass. This is probably very expensive. The production team of the above product should experiment with Graphene.
Why should Graphene be considered for the above project?It should be highlighted that graphene is already being utilized in transportation, medical, electronics, energy, defense, and desalination; graphene research is having a significant influence across a wide variety of sectors.
To put things in perspective, one square meter of normal paper is 1000 times heavier than graphene, while a single sheet of graphene large enough to cover a football field weighs less than a gram. Strongest. With a tensile strength of 150,000,000 psi, graphene outperforms steel and Kevlar.
Graphene, a single sheet of carbon atoms, has been hailed as the strongest substance known to man, 200 times stronger than steel, lighter than paper, and with amazing mechanical and electrical capabilities.
Given that graphene is formed of carbon, and carbon is in plentiful supply, it will very certainly be less expensive than fiberglass.
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Are these statements about the Fluid mechanics true?
Statement 1: Fluid mechanics is a branch in chemistry that involves study of fluids.
Statement 2: Fluid mechanics can be divided into 2 major categories.
a) True, False
b) True, True
c) False, True
d) False, False
Announcement 1: Fluid mechanics is a branch of chemistry that involves having a look at fluids: c) False, True
Fluid mechanics is the branch of physics concerned with the mechanics of fluids and the forces on them. It has programs in an extensive variety of disciplines, such as mechanical, aerospace, civil, chemical, and biomedical engineering, geophysics, oceanography, meteorology, astrophysics, and biology. Fluid mechanics is the look at of the forces of the fluid and the way fluids flow. Fluid mechanics may be divided into parts: fluid statics and fluid dynamics. Fluid statics is the observation of fluids at rest, and fluid dynamics is the study of fluids in motion.
Fluid mechanics is the look at fluid behavior (beverages, gases, blood, and plasmas) at relaxation and in movement. Fluid mechanics has a huge variety of packages in mechanical and chemical engineering, organic structures, and in astrophysics.
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Which process is required to allow a gravitationally-collapsing gas cloud to continue to collapse?.
Most of the cloud's thermal energy must be radiated away.
The cloud must constantly produce new dust particles. A collision with another cloud is required. Most of the cloud's thermal energy must be trapped there. Star formation depends significantly on angular momentum.
Low, dense clouds mainly serve to deflect solar energy and chill the Earth's surface. High, thin clouds mostly reflect incoming solar radiation; but, they also trap part of the infrared radiation that the Earth emits and reflect it back down, warming the Earth's surface.
The amount of emission from a cloud changes directly with its temperature in addition to being influenced by a number of other elements, including the thickness of the cloud and the composition of the cloud.
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What is the magnitude b of the magnetic field at the location of the charge due to the current-carrying wire?.
Using the right hand rule, it is possible to calculate the magnetic field direction at the site of the charge caused by the current-carrying wire.
In the simplest terms possible, what is a magnetic field?The region surrounding a magnet where the effects of magnetism are perceived is known as the magnetic field. To explain how the magnetic force is dispersed in the area surrounding and inside something magnetic in nature, we utilize the magnetic field as a tool.
How does the magnetic field function?The same poles resist one another whereas opposite poles are attracted to one another. The north-seeking poles of the iron's atoms line up in the same way when you rub it against a magnet.
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PRELAB: A MODEL FOR CIRCUITS III: CAPACITORS AND RC CIRCUITS
1. Predict the change in capacitance of a parallel plate capacitor as the area of the plates is increased.
2. Predict the change in capacitance of a parallel plate capacitor as the separation between the plates is increased.
3. Briefly describe the observations you will make in Activity 1-2 of the lab to test one of these two predictions.
4. If you have two identical capacitors, what do you predict will be the capacitance of the two connected in parallel?
5. Briefly describe the observations you will make in Activity 2-1 of the lab to test this prediction.
6. What devices will you use to measure the decay of voltage in an RC circuit?
A parallel plate capacitor has a capacitance of C=fracepsilon_0 Ad, where A is the area of the plates and d is the distance between them. 1) If the area of the plates A_1 grows, then A_1>A C_1=fracepsilon_0 A_1d>fracepsilon_0 Ad C_1>C, which means that the capacitance also grows.
2) If the distance between the plates is increased by d_1, the capacitance decreases because d_1>d C_1=fracepsilon_0 Ad_1 fracepsilon_0 Ad C_1C.
3) Since capacitance is directly proportional to plate area, capacitance also increases with plate area.
Because capacitance is inversely proportional to plate separation, capacitance decreases as plate separation increases.
4) When two identical capacitors are connected in parallel, their equivalent capacitance is C_1 C_1=C+C=2C. 6) The Voltmeter is the device used to measure the voltage decay in an RC circuit.
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