A solution is made by dissolving 15.5 g of calcium chloride, cacl2, in enough water to make exactly 100 ml of solution. The a solution is made by dissolving 15.5 g of calcium chloride, cacl2, in enough water to make exactly 100 ml of solution will be 1.4 mol /L
given
volume of solution = 100 mL = 0.1 L
number of moles = mass / molar mass
= 15.5 / 111 = 0.14 mol
molarity = number of moles of solute / volume of the solution
= 0.14 / 0.1 = 1.4 mol /L
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sanjay, a stockbroker, runs two miles every day after work because it reduces his level of stress. sanjay's running habit is maintained by a____reinforcer.
negative
Sanjay's running habit is maintained by a Negative reinforcer.
What are the effects of stress?When a situation demands more of a person than they can mobilize, that situation is said to be stressful. Different types of stress can cause negative behaviour in people.An individual needs stress to survive, yet too much stress can harm our bodies. An individual in a distressed state is more susceptible to a number of health issues, including headaches, chest pain, difficulty sleeping, mental disturbances, and high blood pressure. Emotional stress has been linked to immune system deterioration and heart muscle exhaustion. Epinephrine is released in cases of stress-related conditions. Our hearts are harmed by excessive stress.To learn more about effects of stress refer to:
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onsider the molecule ccl4. each c-cl bond in this molecule is because the electronegativity difference between c and cl is equal to
Considering the molecule CCl4. Each C-Cl bond in this molecule is Polar because the electronegativity difference between C and Cl is greater than 0.4.
Carbon tetrachloride, also known by other names is an organic compound with the chemical formula CCl₄. Since CCL4 is tetrahedral in shape and symmetrical, the individual bond dipoles cancel each other and the molecule is non polar overall. But the electronegativity difference between C and Cl is greater than 0.4.
Hence, the bond of CCl4 which is C-Cl is Polar but the compound is overall non-polar.
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A loop of wire is placed in a uniform magnetic field. For what orientation of the loop is the magnetic flux a maximum? for what orientation is the flux zero?.
The correct answer is a) magnetic flux is maximum when the plane of the loop is parallel to the magnetic field. B) magnetic flux is zero, when the plane of the loop is perpendicular to the magnetic field.
What is uniform magnetic field?
The field lines must be both parallel and equally spaced in order for the region under examination to have a uniform magnetic field, which must have the same strength and direction throughout.
Hence the loop's plane is parallel to the magnetic field when the magnetic flux is at its highest (answer a). When the plane of the loop is parallel to the magnetic field, the magnetic flux is zero. (answer b)
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In contrast to earlier scholars, what did galileo galilei and isaac newton believe about theories of the natural world?.
In contrast to earlier scholars, galileo galilei and isaac newton believe about several experiments and close observation.
who was isaac newton?
Sir Isaac Newton PRS was an English mathematician, physicist, astronomer, alchemist, theologian, and author (referred to in his day as a "natural philosopher") who lived from 25 December 1642 to 20 March 1726/27[a]. He is regarded as one of the greatest mathematicians and physicists of all time and one of the most influential scientists of all time. He had a significant role in the intellectual movement known as the Enlightenment. In 1687, he wrote Philosophiae Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), which founded classical mechanics. Additionally, Newton made important discoveries to optics, and he shares the invention of infinitesimal calculus with German mathematician Gottfried Wilhelm Leibniz.
The earlier scholars like galileo and isaaac newton believe that several experiments and close observation will be great for their theories
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17. You have a cart that has a mass of 400 kg and a KE of 500 J, you remove some of the things on the cart to make it lighter. If it is moving at the same speed as before, and the KE is now 125 J, what is the new mass?
You have a cart that has a mass of 400 kg and a KE of 500 J, you remove some of the things on the cart to make it lighter. If it is moving at the same speed as before, and the KE is now 125 J, what is the new mass?
kinetic energy : the energy which a body possesses by the virtue of motion
velocity : it is the rate at which a body covers displacement.
The mass of the cart given initially is : 400kg
The kinetic energy given initially is : 500J
now we know the kinetic energy formula : KE = [tex]\frac{1}{2}mv^{2}[/tex]
in the first case lets apply this formula and get the velocity first.
500 = (1/2)x(400)x[tex]v^{2}[/tex]
500x2 = 400x[tex]v^{2}[/tex]
[tex]v^{2}[/tex] = 1000/400
[tex]v^{2}[/tex] = 10/4
therefore [tex]v^{2}[/tex] = 10/4 [tex]m^{2}/s^{2}[/tex]
now that we found the velocity of the body, lets use this to find the new mass.
now in the second case, we have
new kinetic energy : 125J
let the new mass be m.
lets substitute the given info in the formula , we get
125 = (1/2)x(m)x[tex]v^{2}[/tex]
but we know [tex]v^{2}[/tex] = 10/4
so we have,
125 = (1/2)x(m)x(10/4)
125x2 = (10m/4)
150x4 = 10m
60=m
therefore the new mass of the body is 60kg
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a 12.0-kilogram cart is moving at a speed of 0.25 meter per second. after the speed of the cart is tripled, the inertia of the cart will be
To known the speed and inertia of the cart.
What is inertia?
Matter has an attribute called inertia that makes it resist changes in velocity (speed and/or direction). Newton's first law of motion states that an object moving at a certain speed will stay there unless it is acted upon by an outside force.
What constitutes speed?
The speed of a change in an object's position in any direction Speed is defined as the ratio of distance to the amount of time it takes to cover that distance. Due to its lack of magnitude and only having a direction, speed is a scalar quantity.
Inertia of a cart is only dependent on the mass of the cart .
Mass of the cart , M = 12 Kg is moving at speed 0.25 m/s , speed of the cart is tripled but mass remains same , so that means inertia of the cart will be unchanged.
Therefore, the inertia of the cart is will be unchanged.
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The measure of dispersion which is not measured in the same units as the original data is the.
Variance is not expressed in the same units as the original data.
The variance of a random variable from its population mean or sample mean is expected in probability theory and statistics. The term "variance" refers to a measurement of how widely apart a group of numbers are from one another. In statistics, variance plays a key role. Descriptive statistics, statistical inference, hypothesis testing, goodness of fit, and Monte Carlo sampling are just a few notions that make use of variance. In the sciences, where data statistical analysis is frequently used, variance is a crucial instrument. The variance, which also refers to the second central moment of a distribution and the covariance between the random variable and itself, is defined as the square of the standard deviation.
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Physics: Please Help
Answer:
is given below.
Explanation:
In the first question, we made a choice to determine how many vectors that have the horizontal component. The logic is simple. If a vector is not on the y-axis respectively, it has to have any horizontal component.[tex]d_1[/tex] and [tex]d_3[/tex] have the same vertical component on y-axis.Vectors have both magnitude and direction.We used a right triangle to determine the magnitude of displacement vector by applying Pythagorean Theorem which is [tex]a²+b²=c²[/tex].The last one is shown in diagram.Forty 2.0 kg blocks 20.0 cm thick are used to make a retaining wall in a backyard. Each row of the wall will contain 10 blocks. You may assume that the first block is placed at the reference level. How much gravitational potential energy is stored in the wall when the blocks are set in place?
The gravitational potential energy stored in the wall is 627J
Gravitational potential energy is the energy that an object has or gains as a result of a change in its position while in a gravitational field. Gravitational potential energy is energy that is related to gravitational force.
Given
A retaining wall in the backyard is built with forty 2.0kg blocks that are 20.0cm thick. Each row of the wall will have ten blocks. You might guess that the first block is at the top.
we have to determine the gravitational potential energy stored in the wall
By using the equation Eg=mgh
To find mass(m) = 40 x 0.2
= 80kg
To find height(h) = 20c m = 0.2x0.2x4
= 0.8m
= 80kg
So I used 4 because the wall will be four rows high
Eg = 80x0.8x9.8
= 627J
Therefore the gravitational potential energy stored in the wall is 627J
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calculate the height (in m) of a cliff if it takes 2.30 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.05 m/s. how long (in s) would it take to reach the ground if it is thrown straight down with the same speed?
The ground if it is thrown straight down with the same speed is 1.206 secs.
Solution:
H = .5*g*t²
Since H = 7.13
t = sqrt(2H/g) = 1.206 secs
This equation defines the maximum projectile height from the launch position and depends only on the vertical component of the initial velocity. After that, we need to use the velocity vector components to derive an expression for the object's maximum height and range in the projectile's motion.
We also need to use Newton's equations of motion. The gravitational potential energy that an object has at the beginning of its fall is converted into kinetic energy as it falls, and this kinetic energy is used to produce sound and cause the object to bounce or deform when it hits the ground or breaks meet.
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Consider two carts moving on a track. The first cart has a mass of m, and the second cart has a mass of 3m. The first mass is moving at a velocity v towards the second, which is stationary.
The first mass is moving at a velocity v towards the second, [tex]\frac{3}{2} mv[/tex] is stationary.
impulse imported to cart 1 = change in momentum
=|ΔP| = [tex]p_{f}[/tex] - [tex]p_{i}[/tex]
=m([tex]\frac{-v}{2}[/tex]) - (mv)
=[tex]\frac{-3}{2} mv[/tex]
Magnitude of impulse = [tex]\frac{3}{2} mv[/tex]
Velocity is the direction at which an object is moving and serves as a measure of the rate at which its position is changing as seen from a specific point of view and as measured by a specific unit of time (for example, 60 km/h northbound). In kinematics, the area of classical mechanics that deals with the motion of bodies, velocity is a fundamental idea.
A physical vector quantity called velocity must have both a magnitude and a direction in order to be defined. Speed is the scalar absolute value (magnitude) of velocity; it is a coherent derived unit whose quantity is measured in metres per second (m/s or m/s1) in the SI (metric system). In contrast to "5 meters per second east," which is a vector, "5 meters per second," for instance, is a scalar.
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conceptual analysis: use your observations to answer the following questions using complete sentences and complete thoughts. 1. how do the individual forces compare when the rider experiences a normal sensation of weight? what is the acceleration value when this occurs? 2. how do the individual forces compare when the rider experiences a sensation of being lighter than his normal weight? what is the acceleration direction when this occurs?
1. The individual forces cancel each other in case the rider feels the normal sensation of weight which means the net acceleration of the rider is zero cause
mg= W+F
g = a+g
So,
a= 0 which means the rider is not moving.
2. if a rider feels the weight is less than normal then individual forces do not cancel each other but the upper moving force is less than the weight of the rider that's why net acceleration is downward.
The direction of acceleration depends on whether the object is accelerating or decelerating and the direction the object is moving. When an object is accelerated, its acceleration is usually in the same direction as its motion. When an object slows down, its acceleration is in the opposite direction of its motion. The acceleration due to gravity is always constant and downward.
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Type your answer in the box. You may use numbers and/or a negative sign (-) in your answer. What is the difference in kilowatt hours of monthly energy production between an average local wind speed of 15 miles per hour and an average local wind speed of 10 miles per hour?.
The difference in kilowatt-hours of monthly energy production between an average local wind speed of 15 miles per hour and an average local wind speed of 10 miles per hour is 5 miles per hour.
Energy production refers to how a lot of number one power a country extracts from nature. that is the whole of all of the harvested number one fuels and number one energy flows. word manufacturing ignores both imports and exports, and sums up what's extracted from nature.
In modern-day wind generators, wind rotates the rotor blades, which convert kinetic energy into rotational energy. This rotational power is transferred with the aid of a shaft to the generator, thereby producing electrical power.
Calculation:-
local wind speed of 15 miles per hour.
an average local wind speed of 10 miles per hour.
Therefore difference = 15 - 10
= 5 miles per hour.
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If environmental triggers cannot be avoided or modified, they may make it difficult to extinguish a behavior. please select the best answer from the choices provided t f
The answer is True . An external or internal trigger can occur Environment-based factors serve as external triggers. They are detected by our minds as well as by our five senses.
Internal triggers are unrelated to anything outside of us and are caused by our ideas and feelings. A stimulus in physiology is a perceptible alteration in the internal or external surroundings of an organism's physical or chemical composition. Sensitivity is the capacity of an organism or organ to recognize external stimuli and respond accordingly (excitability). The function of that behavior is the explanation for why a behavior persists in Applied Behavior Analysis (ABA). The child receives reinforcement from these activities. The behavior will stop and be replaced by a new behavior if it ceases to serve that purpose.
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If the current in a a wire is 2. 0 amperes and the voltage across the wire is 10 volts, what is the resistance of the wire?.
Answer:
5 ohms
Explanation:
V = IR
V/I = R 10 / 2 = 5 Ω
Which sentence can represent the inequality startfraction n over 4. 2 endfraction less-than-or-equal-to 21? the quotient of a number and 4. 2 is less than or equal to 21. The quotient of a number and 4. 2 is less than 21. The quotient of 4. 2 and a number is less than or equal to 21. The quotient of 4. 2 and a number is less than 21.
The sentence can constitute the inequality in the quotient of more than a few and four.2 is less than or identical to 21.
A quotient is a quantity produced by the division of numbers. The quotient has extensive use throughout mathematics and is generally called the integer part of a department, or as a fraction or a ratio.
The range we reap when we divide one quantity via some other is the quotient. as instance, in 8 ÷ 4 = 2; here, the end result of the department is 2, so it's miles the quotient. eight is the dividend and 4 is the divisor.
The quotient of department trouble is determined with the aid of dividing the dividend through the divisor. this can be accomplished thru repeated subtraction or long division. it's far possible to find the quotient of two integers, fractions, or two algebraic terms.
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What aspect of performance is improved due to 2023 armada’s 7-speed automatic transmission using low gear ratios for 1st through 4th gears?.
The 2023 Armada's 7-speed automatic transmission offers lower gear ratios from 1st to 4th for better acceleration.
Low gear is used when you want to increase engine power and lower vehicle speed. This puts less strain on the brakes and maximizes the car's power in situations such as towing or driving on hills. If you want to force an automatic transmission vehicle to downshift into a lower gear, you must first release the accelerator pedal.
Then drop the transmission into a lower gear and keep the speed at that level for as long as you want the car to be in that gear. You can shift from D to L while traveling in an automatic car. Today's transmission is electronic. It has a rev limiter for shifting into lower gears. The transmission will not downshift to a lower gear than the specific RPM for each gear.
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suppose jupiter were not a planet, but instead were a g5 main-sequence star with a mass of 0.8 msun. how could this affect the sun as the g5 star came to the end of its life
The G5 may also have transferred all its mass to the solar, inflicting the sun to explode as a type I supernova.
The solar might have already come to be a white dwarf, and as the G5 swelled right into a red giant, cloth from it might be transferred to an accretion disk across the solar, making the sun explode as a nova.
The sun could have already come to be a white dwarf, and because the G5 swelled right into a purple giant, fabric from it would be transferred to an accretion disk across the sun, making the solar explode as a nova.
Mass is the single maximum important property of a celeb. It determines the evolution of a star as well as its lifetime (e.g. decreased mass stars live longer). In all of the above-discussed instances, this means the initial mass, which decreases by using much less than 1% from birth to the onset of a planetary nebula or a supernova.
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What force causes centripetal acceleration of a car making a turn on a flat road?
The force that causes centripetal acceleration of a car making a turn on a flat road is friction
The centripetal acceleration is required to create a centripetal force. The centripetal force that cause an object to turn in a circular path is due to the force of friction between the tyres and the road. The magnitude of centripetal force is numerically equal to the magnitude of frictional force.
Fc = f
m v² / r = μ N
Fc ∝ 1 / r
The larger the centripetal force the the smaller the radius of curvature.
Therefore, the force that causes centripetal acceleration of a car making a turn on a flat road is friction
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an orthopedic drill uses circular motion to cut a hole in bone. this is an example of what type of energy?
Orthopedic drill is an example of a type of kinetic energy. It uses circular motion to cut a hole in bone.
Orthopedic drillOrthopedic drill is for traumatology cases, and hand-foot surgery, with a wide range of attachments for various applications (punching holes, saws, attaching screws, installing wires, and widening holes), and a powerful and reliable handpiece.
It uses circular motion by rotating on a circular axis due to a change in potential energy into kinetic energy which gives enough speed to make a rotation.
In an orthopedic drill, there is a change in electrical energy into motion energy (kinetic energy).
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A 6,900 kg freight truck accelerates from 3 m/s to 47 m/s in 8.1 s by applying a constant force. How much force was applied to the truck?
Work Out And Use Units Please
Approximately, 37,481.5 Newtons of force was applied to the truck.
What is a force?A force is a push or pull on an object with mass causes it to change its velocity. Force is an external agent capable of changing a body's state of rest or motion. It has a magnitude and a direction, so it is a vector quantity.
Mathematically, Force = mass x acceleration
but [tex]a=\frac{v-u}{t}[/tex]
so, [tex]F = m\frac{v-u}{t}[/tex]
[tex]F = 6900\frac{47-3}{8.1}[/tex]
F = 6900(5.4)
F = 37,481.5N
In conclusion, the force applied to the freight truck was 37,481.5N.
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If a second object identical to the first object is placed on top of the first object, what acceleration would the 200 N force produce?
the first object had a mass of 40kg
The acceleration that a 200N force would produce is 2.5m/s².
How to calculate acceleration?Acceleration is the amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
The acceleration of a body can be calculated by using the following formula:
a = F/m
Where;
a = acceleration (m/s²)F = force (N)m = mass (kg)According to this question, a second object identical to the first object is placed on top of the first object, the acceleration required by a 200 N force if the first object had a mass of 40kg can be calculated as follows:
mass 1 + mass 2 = 40kg + 40kg = 80kg
a = 200N ÷ 80kg
a = 2.5m/s²
Therefore, 2.5m/s² is the acceleration that will be produced by the force.
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a weight lifter lifts a 410-n set of weights from ground level to a position over his head, a vertical distance of 2.30 m. how much work does the weight lifter do, assuming he moves the weights at constant speed?
The answer is PE = 943j or 943 N*M.
Solution:
Work is measured in joules or newton-meters
It may be thought of as force * distance
If there were acceleration in this problem, the force would be more than the weight, but because the speed is constant force = weight.
so,
Work = Force * Distance
= 2.30m * 410 N
= 943 j or 943 N*M
If you're looking at this from an energy standpoint, you can just consider the final PE as the energy required because there is no KE at the end. so,
PE = m*g*h
and m*g =410N
h = 2.30m
PE = 943j or 943 N*M
Work is done when a force acts in the direction an object is moving. When the weightlifter applies an upward force to lift the barbell, the job is done. The weightlifter holds the barbell above his head, so he's not moving the barbell. While it's true that steady-state aerobic exercise is likely to help with weight loss, experts say it's entirely unnecessary if your primary goal is fat loss.
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rank the moments of inertia of this object about the axes indicated. rank from largest to smallest. to rank items as equivalent, overlap them
The moments of inertia of the object about the axes from largest to smallest is I3 > I1 > I2
I = ∑ m r²
I = Moment of inertia
m = Mass
r = Distance from origin
For system 1,
I1 = m1 r1² + m2 r2²
I1 = m ( r / 2 )² + m ( r / 2 )²
I1 = m r² / 2
For system 2,
I2 = m1 r1² + m2 r2²
I2 = 2 m ( r / 4 )² + m ( r / 4 )²
I2 = 2 m r² / 16 + m r² / 16
I2 = 3 m r² / 16
For system 3,
I3 = m1 r1² + m2 r2²
I3 = ( m / 2 ) r² + ( m / 2 ) r²
I3 = m r²
Clearly I3 > I1 > I2
Therefore, the moments of inertia of the object about the axes from largest to smallest is I3 > I1 > I2
The given question is incomplete. The complete question is:
Rank in order, from smallest to largest, the moments of inertia I1, I2, and I3 about axes through the centers of the rods. Rank I1, I2, and I3 from smallest to largest. To rank items as equivalent, overlap them. The image of the rods is shown in the image attached.
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how many times the acceleration due to gravity g near the earth's surface is the acceleration due to gravity near the surface of this exoplanet?
The acceleration due to gravity near the surface of this exoplanet is 1.49 times the acceleration due to gravity near the surface of Earth
Let M be the mass of Earth and R be the radius of Earth and let g be the acceleration due to gravity near the surface of Earth.
g = GM / R²
G = Gravitational constant.
For the exoplanet,
Mass = 7.9 M
Diameter = 2.3 ( 2R ) ( Since D = 2R )
Radius = 2.3 R
Let g' be the acceleration due to gravity near the surface of the exoplanet.
g' = G ( 7.9 M ) / ( 2.3 R )²
g' = 1.49 G M / R²
g' = 1.49 g
Therefore, the the acceleration due to gravity near the surface of this exoplanet is 1.49 times the acceleration due to gravity near the surface of Earth
The given question is incomplete. The complete question is :
One recently discovered extrasolar planet, or exoplanet, orbits a star whose mass is 0.70 times the mass of our sun. This planet has been found to have 2.3 times the earth's diameter and 7.9 times the earth's mass. How many times the acceleration due to gravity g near the earth's surface is the acceleration due to gravity near the surface of this exoplanet?
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suppose a material has a work function equal to 1.7x10^-19 j. what is the threshold wavelength for the production of photoelectrons?
The threshold wavelength for the production of photoelectrons with the work function 1.7 x 10^-19 J is 11.69 x 10^-7 m.
What is threshold wavelength?
Threshold wavelength is the minimum wavelength for any incident radiation should possess in order for the photoelectric effect to take place. The wavelength of the incident light must be less than the threshold wavelength for any photoelectric emission to occur.
The threshold wavelength can be calculated as,
φ = hC / λ
where φ = work function, λ = threshold wavelength, h = Planck's constant and C = velocity of light.
λ = hC / φ = 6.625 x 10^-34 x 3 x 10^8 / 1.7 x 10^-19 = 11.69 x 10^-7 m
Therefore, the threshold wavelength for the production of photoelectrons with the work function 1.7 x 10^-19 J is 11.69 x 10^-7 m.
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Super Chicken! isn't just any ol' superhero. No, this chicken has a
mass of 81 kg, is 6 feet tall, and can outrun a racehorse at 32 m/s.
What is Super Chicken's! kinetic energy?
espite the magnetic force, the electron continues to travel in a straight line at constant speed. you conclude that there must be another force acting on the electron. since you know there is also an electric field in this region, you decide that the other force must be an electric force. what is this electric force?
Despite of magnetic field, the electron moves with a constant speed and then:
Magnetic force is balanced by electric force
Fe = Fb = 2.88 * 10^-14 N
The corresponding electric field is
E = Fe / q
E = 2.88 * 10^-14 / 1.6* 10^-19
E = 1.8 * 10^5 N/C
This means that the magnetic field redirects the movement of charges. Therefore, particles can neither gain nor lose kinetic energy. Since the Lorentz force is always perpendicular to the direction, it acts as a centripetal force on velocity particles perpendicular to the direction of the magnetic field.
Lorentz force is the force exerted on a charged particle q moving with velocity v through an electric field E and a magnetic field B. Since the magnetic force acts perpendicular to the direction of motion, the work of the magnetic force on each moving charged particle is zero. Therefore speed will remain the same. Magnetic force is always perpendicular to the magnetic field. Reason Electric force is along the direction of the electric field.
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To outside observers at rest, the overall sizes of objects traveling at relativistic speeds are.
To outside observers at rest, the overall sizes of objects traveling at relativistic speeds are smaller.
The mathematical sign for light speed, "c," or relativistic speed, is approximately 186,282 miles per second. As a result, relativistic speed refers to the rate at which such effects are crucial for obtaining the proper level of measurement accuracy for the event under consideration. the discrepancies between values computed using relativity-based theories.
sizes of objects, in general, refers to a thing's size or magnitude. More specifically, the terms "geometrical size" or "spatial size" can be used to describe area, volume, or linear dimensions. Mass can also be used to estimate size, particularly when a range of densities is assumed. A file's actual space on a disc is represented by its sizes of objects. A file's logical and physical dimensions can match.
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what will be the final charge on the capacitor after the switch is closed and equilibrium has been reached?
The final charge on the capacitor after the switch is closed and equilibrium has been reached is 99.6μc.
When the switch is closed the equilibrium scenario is that there may be no current flowing via the branch with the capacitor however there may be presently flowing through each resistor. when the circuit switch is of no electricity will drift and then the circuit is called an open circuit. electricity will not waft in an open circuit.
A transfer has two states Open or closed whilst a transfer is open no modern-day can glide thru it. whilst a switch is closed contemporary flows via it. straight away after the switch is closed, the uncharged capacitor acts as a closed loop of wire and not using a voltage drop. because this current will only drift through the capacitor's branch and now not via the resistor as it has resistance and the capacitor acts as a short within the circuit.
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