The velocity of the ball which is projected straight upward after 3 sec is found to be 49.4m/s.
What is a motion in free fall?When an object falls through with a vacuum, it is solely subject to one external force: gravitational force, which corresponds to the object's weight. Free falling is the term for an item that is only moving due to the pull of gravity, and Newton's second rule of motion describes this motion.
U => 20m/s
t=3s
V= u+gt ; According to law of motion
V= 20 + 9.8x3 (+ve g since the projected straight upward)
=> 49.4m/s
What happens if you throw a ball vertically up in the air?When the body is propelled upward, it rises vertically until both the ball's velocity and the force acting on it are zero. The ball then experiences zero velocity as it accelerates due to gravity it until touches the earth.
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At what locations in a neuron would you be likely to find a high concentration of voltage-gated sodium channels?
Well at level of the axon beginning segment (AIS) Nav1. 1, 1.2, and 1.6, as well as the nodes of Network consists of a number 1.2 and 1.6, sodium channels are strongly concentrated.
Where are there a lot of sodium channels that are voltage-gated?SCN 9A, a gene on chromosome 2 that encodes the voltage-gated values of the parameters 1.7, can be found there. It acts on the thresholds and modification of activity of the channel, amplifies minor depolarizations, and is particularly concentrated in the magnitude ganglion and dorsal root ganglia.
What has a high neurotransmitter concentration?Turkey, liver, eggs, dairy, seafood, soy, and other foods contain food neurotransmitters. Most significantly, the bulk of the skin's serotonin, a key neurotransmitter, is produced by gut flora, which develops spontaneously in the small intestine.
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rank the following worlds by the strength of wind erosion currently operating on their surfaces, from greatest to least: a. mercury b. venus c. earth d. moon e. mars
The ranking of the following worlds by wind erosion strength, from greatest to least is Earth, Venus, MARS, Moon, and Mercury.
Which of the following words has experienced erosion brought on by wind and water?Currently, wind erosion may be seen on Mars, Venus, and Earth. From the minute sand ripples observed by Mars rovers to the enormous dunes visible in photographs taken by orbiting spacecraft, particles are blasted into waves. All three planets have dunes visible on their surfaces.
Where does wind erosion occur most frequently?Although wind erosion occurs most frequently in deserts, coastal sand dunes, and beaches, it can also occur in agricultural regions under particular circumstances of the soil.
Does Venus experience wind erosion?On Venus, something is taking place. Strange lines that indicate some sort of ongoing erosion may be seen all across the surface of our neighboring planet, which is frequently thought of as being lifeless and dormant.
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part a what is the electric flux through the surface a1 that encloses all three objects? express your answer to two significant figures and include the appropriate units.
Also because field lines entering and leaving a closed surface are equal, the magnetic flux through the surface is zero.
What is the top surface's electric flux like?→ds=qϵ0. As we all know, the amount of charge contained by a surface determines the quantity of electric flux through it rather than its size, shape, or area. Given that the enclosed charges in the figures are identical, the electric flux across each surface should be identical.
Why is there no electric flux on a closed surface?Gauss' law states that the electroluminescence through some kind of closed surface is commensurate to the net charge contained by the surface. Consequently, when the surface's net charge is contained, is 0, the closed surface's electric flow is also zero.
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a 4.4-g bullet leaves the muzzle of a rifle with a speed of 340 m/s. what force (assumed constant) is exerted on the bullet while it is traveling down the 0.81-m-long barrel of the rifle?
The force that the 4.4-g bullet leaves the muzzle of a rifle with a speed of 340 m/s, while it is traveling down the 0.81-m-long barrel of the rifle = 313.975 N
The force is a push or pull acting upon an object as a result of its interaction with another object.
The equation:
F = m. a
Where,
F = force (N)
m = mass of the object (kg)
a = acceleration (m/s²)
Hence,
a = (v2² - v1²) 2s
= (340² - 0²) / 2 (0.81)
= 71,385.0247 m/s²
F = m x a
= (4.4 x 10–³) (71,385.0247)
= 313.975 N
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during the last 0.97 s of its fall, the object drops a distance h/3 before hitting the ground. what is h in meters?
the value of height in meters is 6.55 m.
We can use the equation for distance and the velocity-time equation to solve for height since the item travels a distance of h/3 in the final 0.97 s of its fall.
When an object is falling freely under the effects of gravity, the following equation gives the distance:
Distance = (1/2) * Acceleration * Time * Initial Velocity * Time
Since the item is starting from rest, its initial velocity is zero, and its gravitational acceleration is 9.8 m/s2. To find h, we can enter the following values into the equation:
h/3 = [tex](1/2) * 9.8 m/s^2 * 0.97 s^2[/tex]
calculating h:
h = [tex](2 * (h/3)) / (0.97 s)^2\\[/tex]
h = [tex](2 * (h/3)) / (0.97 s)^2[/tex]
h =[tex](2 * (h/3)) / 0.9409[/tex]
h = 6.55 m
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gauss’s law is useful for calculating electric fields that are , true
This claim is accurate because, assuming the electric field on the normal distribution surface is uniform, the field may be calculated by dividing Q enclosed/e0 by area.
What is the explanation of the electric field?The value per unit particles that is applied to describe the electromagnetic field analytically is just the force per tonne of production applied on a test charge that is located rest at a certain place. An electric field can be created by an electric charge or a magnetic field with varying amplitudes.
Can a person sense an electric field?While it has long been recognized that cells in animals and even humans can perceive and respond to electromagnetic fields, the precise mechanism by which cells do so has remained somewhat obscure and the focus of current study.
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for this situation, i push on a heavy chair. suppose i push moderately on the chair, and this time the chair does move. then the strength of the force the chair exerts on me is
The strength of the force the chair exerts on me is equal in magnitude to the force I exerted on the chair, but opposite in direction. This is due to Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction.
What is the initial force that I exert on the heavy chair?The preliminary force that you exert on the heavy chair is the force which you follow to it that allows you to get it to move. The energy of this force will rely on a number of factors, such as your personal bodily power, the load of the chair, and the surface you are pushing it on. In widespread, you may want to use a mild amount of pressure so one can get a heavy chair to transport, and this force will boom because the chair receives heavier. Additionally, if you are pushing the chair on a slippery floor, you may need to apply a more potent force in order to overcome the friction among the chair and the floor.
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the liquid and___states are called the___states of matter because their particles are very close together.
Because the particles in solids and liquids are so near to one another, they are frequently referred to that as condensed phases.
What of the five states of matter is a liquid?A form of substance known as a liquid has special properties that make this less stiff than a firm but even more rigid than that of a gas. Unlike a solid, which has a defined form, a liquid may flow. In contrast, a liquid takes on the form of the container it is kept in.
What different matter states are there?The three particles of matter are indeed the solid, liquid, and gaseous phases that matter may adopt in the majority of settings. Extreme environments could contain other states like plasma, Bose-Einstein condensed, and neutron stars.
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α helices are coils with how many amino acids per complete turn?
A 36 amino acid long helix would have 10 turns since alpha-helices contain 3.6 amino acids each turn.
What is the role of amino acids?Body protein as well as other vital nitrogen-containing substances including creatine, peptide hormones, as well as some neurotransmitters cannot be produced without amino acids. Although limits are expressed in terms of protein, amino acids are a biological necessity.
What is an example of an amino acid?Amino acids are the primary building elements of proteins. Their molecule has both an amino as well as a carboxylic group. Alpha-amino acid are amino acids that have a carboxyl group and an alpha-carbon atom linked to the same carbon atom. Glycine, alanine, etc. are a few examples.
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a powerful motorcycle can accelerate from rest to 26.8 m/s in only 3.90s. how far does it go in that time, in meters? (assume uniform acceleration and give your answer as a number)
A powerful motorcycle can accelerate from rest to 26.8 m/s in only 3.90s. It will go 52.3 m in that time.
According to the Question,
It is given that,
Initial velocity of motorcycle is zero and,
Final velocity is 26.8m/s and,
it's acceleration during a time of 3.90s
Now, The end position is equal to the initial position plus the average velocity times time, according to the formula for average velocity that we plug in here.
In other words, the distance travelled will be equal to 0 meters (the initial position), plus 0 meters per second (the initial velocity), plus 26.8 meters per second (the final velocity), divided by 2 times 3.90 seconds, or 52.3 meters.
Therefore,0+0+26.8/2x3.90=52.3m
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You run 40m east in 5 seconds. What is your velocity?
-8 m/s east
-40 m east
-8 m/s
-5 s
The velocity of one who runs 40m east in 5 seconds is 8 m/s east.
What is the velocity?
Velocity is simply the speed at which an object moves in a particular direction.
It is expressed as;
Velocity = Distance / Time.
Given the data in the question;
Distance = 40mElapsed time = 5 secondsVelocity = ?Plug the given values into the above formula and solve for velocity.
Velocity = Distance / Time.
Velocity = 40m / 5s
Velocity = 8m/s
Therefore, the velocity is 8m/s east.
Option A) 8m/s east is the correct answer.
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which quantum numbers are needed to define an orbital
The integers 0, 1, 2, 3, and so on are the three quantum numbers (n, l, and m) that describe an orbital. There can be no zero for the main quantum number (n). Therefore, the permitted values for n are 1, 2, 3, 4, and so forth. Any integer between 0 and n – 1 can serve as the angular quantum number (l).
To define, how often quantum numbers are needed?
The primary, azimuthal, magnetic, and rotational quantum numbers are the four types of quantum numbers. Quantum numbers provide the values of a quantum system's preserved quantities.
What number of quantum numbers define an electron and its orbital?There are four separate quantum numbers that describe each electron in an atom. The fourth (m-s) defines the maximum number of electrons that can occupy the orbital, whereas the first three (n, l, and m) specify the specific orbital of interest.
How many sets of four quantum numbers are there that an electron can have?Each electron in a system with multiple electrons has a different collection of four quantum numbers. As a result, the system He2 possesses four electrons and four different sets of the four quantum numbers.
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when a baseball player bats a ball with a force of 1000 n, the reaction force that the ball exerts against the bat is
The reaction force is zero because Newton the force of the bat on the ball is equal and opposite to the force of the ball on the bat. The reaction force is the force by the ball on the bat.
The reaction force is the force of the bat on the ball. Action and reaction force are an integral part of third law of Newton. They are equal and opposite force - couple which act on two opposite objects. That is why they cannot make a body in equilibrium.
In the given case, a bat is hit by a ball, at the point of contact, two equal and opposite forces emerge simultaneous, one acting on the ball and the other acting on the bat. As per the problem force on the bat is called action. So, the other force, that is force acting on the ball is called reaction force.
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T/F the direction of a vector can be different in different coordinate systems.
A vector cannot have a distinct direction in one coordinate system from another. Even if a vector's magnitude is not zero, it can still have a component value of zero.
In distinct coordinate systems, are vector components possible to differ?This disregards the necessity of defining a coordinate system in order to identify a vector's component parts. The components of the vector would change even though the initial vector remained the same if I had chosen a different coordinate system.
What various coordinate systems are there for representing field vectors?Rectangular and Cartesian coordinate systems are the most often used coordinate systems. Cylindrical and spherical coordinate systems are two more often used coordinate systems. A vector is represented in Cartesian coordinates by its elements along the coordinate axes.
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a light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time. which person will get to the ground first?
There is a "final velocity" when there is air resistance, and it depends on both the weight and an aerodynamic element. The heavier individual will strike the ground first if the chutes are of equal size.
What two elements have a significant impact on air resistance for falling objects?To keep things straightforward, it can be noted that the object's speed and cross-sectional area are the two most frequent variables that directly affect the amount of aerodynamic drag.
Why do smaller things fall more quickly?Because to this air resistance, Galileo discovered that heavier or more dense things fall more quickly than less dense ones. Together, a brick and a feather fell. The feather falls more slowly due to air resistance.
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let's say that one of the balloons is positively charged. does this mean that the balloon has gained positive charge, or that it has lost negative charge? discuss.
The atom or molecules of your hair release electrons onto the balloon. Due to the negative charge of electrons, the balloon acquires a negative charge, while your hair retains a positive charge.
Why does water gravitate toward a negatively charged balloon?Both positive and charged particles make up the water. Pro and con charge are attracted to one another, thus when you put the balloon near the water, its positive charged water molecules will pull the water in that direction.
What is the name for the flow of positive charge electrons?Electric The electrons that move through a cable or solution is known as current. In a solid, electrons are transferred from one positive charges metallic atom to the next; in a solution, the ions in the solution carry the electrons.
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the following four objects roll without slipping along a horizontal surface toward an incline. the velocity of the center of mass of each of the objects is the same at the bottom of the incline. which of the objects will roll the greatest distance up the incline before coming to rest?
The objects will roll the greatest distance up the incline before coming to rest is object which has shape: ring mass:M and R:2r.
Definition of inclined PlaneInclined plane is a flat plane that is placed obliquely (forming a certain angle) so as to minimize the power force. As we know, the power force is the force exerted on a particular object. This time, our discussion is about the force exerted to move the object.
In addition to the definition above, an inclined plane means a flat surface that has an angle, which is not a perpendicular angle, to the horizontal surface. So in essence, this inclined plane has an angle that is less than 90°.
The working principle of an inclined plane is to overcome large obstacles by applying a relatively smaller force over a longer distance, than if the load was lifted vertically. In civil engineering terms, the slope (the ratio of height and distance) is called the gradient.
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charlotte is driving at 68.3 mi/h and receives a text message. she looks down at her phone and takes her eyes off the road for 4.39 s. how far has charlotte traveled in feet during this time?
Charlotte traveled for 439.9 feet far. The result is obtained by using the formula for speed.
What is speed?Speed is the rate of change in position of an object without considering the direction. It is a scalar quantity that measures the distance travelled per unit of time. It can be expressed as
s = d/t
Where
s = speedd = distance travelledt = time elapsedCharlotte is driving at 68.3 miles/hour. Then, she takes her eyes off the road for 4.39 s to looks down at her phone. Find the distance Charlotte traveled! (in feet)
She moves with
s = 68.3 miles/hourt = 4.39 secondsLet's convert the unit of speed!
s = 68.3 mph
s = 68.3 × 1.46667 ftps
s = 100.2 ftps
The distance will be
d = s × t
d = 100.2 ftps × 4.39 s
d = 439.9 feet
Hence, the distance Charlotte traveled is 439.9 feet.
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a person applies a force of 60.0 n for a distance of 20.0 m to push a desk across a floor at a constant speed. how much work is done by the person?
The work done by the person is: 1200.0 J
What is work?In physics we can say that work is the force applied to a body or object in order to move it from one point to another. In the international system of units, work is expressed as Joules.
To solve this problem, the formula and procedure we will use is:
W = F * x
Where:
W = WorkF = Forcex = displacementProblem data:
x= 20.0 mF= 60.0 NW = ?Applying the work formula we get:
W = F * x
W = 60.0 N * 20.0 m
W = 1200.0 J
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When a substance absorbs and reflects light, it shows the color of that absorbed and reflected light. But water is colorless. Does it absorb and reflect light. What is the reason for this?
When light enters the water, it slows down, but it continues to travel straight through the water, so it does not change its appearance. This is why water appears colourless, even though it interacts with light in other ways.
Why is water significant?Water is significant because it is essential for life on Earth and plays a vital role in many natural processes. It is a universal solvent, meaning it dissolves a wide range of substances, making it important in chemical reactions.
Is s HCl soluble in water?Yes, hydrochloric acid (HCl) is soluble in water. It dissolves in water to form hydronium ions (H3O+) and chloride ions (Cl-).
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in ideal projectile motion, when the positive y-axis is chosen to be vertically upward, the y-component of the velocity of the object during the ascending part of the motion and the y-component of the velocity during the descending part of the motion are, respectively,
a. positive, negative
b. negative, positive
c. positive, positive
d. negative, negative
The supplied sentence indicates that a. positive, b. negative is the appropriate response.
What is velocity vs speed?Velocity is the pace and direction about an object's movement, whereas speed is the timekeeping at which a object is travelling along a path. In other words, velocity is a vector, whereas speed is still a scalar value.
Is velocity another word for speed?Quickness on motion or activity is known as velocity. Speed is a shorter term and a synonym for celerity. The term "velocity" in physics especially describes the measurement of an object's rate or direction of positional change. It's a vector number that describes a body's motion in terms of both speed and direction.
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where would you expect the atmospheric pressure to be greater: at the top of a mountain or on a beach?
Atmospheric pressure is greater at beach than it is at the top of a mountain.
Atmospheric pressure is the force the air produces per unit of space. Height increases are accompanied by a drop in air pressure. Since the height of the air column is greater at sea level, the air exerts a greater pressure there.The pressure is lower at greater elevations because there are fewer air molecules above a given surface than there would be at a lower elevation.
As you ascend, the height of the air column above you and its density both drop, which causes the atmospheric pressure to drop.
The air pressure will therefore be higher at ground level than it is at the summit of a tall mountain.
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a man standing still at a train station watches two boys throwing a baseball in a moving train. the train is moving east with a constant speed of 18 m/s and one of the boys throws the ball with a speed of 8 m/s with respect to himself toward the other boy, who is 7 m west from him. what is the velocity of the ball as observed by the man on the station?
The tennis ball's final velocity is calculated to just be -1.37ms 1, and the gap between its peak height and change in velocity is 0.10m.
What is the ball's motion?The rolling ball can move in two different ways: translationally and rotatedally. While the ball rotates in the mass center frame, the ball's centre of mass experiences translational motion.
What exactly is speed?The dislocation that an item or particle experiences with regard to time is expressed vectorially as velocity. The metre per second (m/s) is the accepted measure of flow speed (also known as speed). Alternately, the magnitude of velocity can be expressed in centimetres per second (cm/s).
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What is the final charge state of sphere B?
Charges with opposing charges (positive and negative) attracted each other. At the end, the charges on both spheres will be the same, -1nc.
What is charge?Charge is commonly used in chemistry and physics to refer to electric charge, which is the conserved feature of some subatomic particles that governs their electromagnetic interaction. Charge is a physical attribute that causes matter inside an electromagnetic field to experience a force.
Electric charges can be either positive or negative. If there is no net electric charge, the substance is termed neutral or uncharged. Like charges repel each other (for example, two positive charges repelling two negative charges). Charges with opposing charges (positive and negative) attracted each other. At the end, the charges on both spheres will be the same, -1nc.
Therefore, at the end, the charges on both spheres will be the same, -1nc.
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which of the following objects is accelerating? select one: a. a ball moving at a constant rate around a circular hoop b. none of the possible answer choices is correct. c. a book at rest on a table, which is being both pulled by gravity and pushed by the table top d. a car moving constantly at 60 miles per hour down a straight and level highway
Answer: Option A is correct.
Explanation: To have acceleration, you need to have a change in speed or direction, or both. The ball moving around the circular hoop is not changing speed, but it is changing direction. So, it is accelerating.
(a) what was the x component of average velocity for the 3-hour period, using the fundamental definition of average velocity, which is the displacement divided by the time interval?
The required average velocity which is the displacement divided by the time interval is calculated to be 26.7 mph.
At a constant speed of 20 mph for the first five hours, we determine the total displacement to be as follows:
Δx₁ = v₁ × t₁ = 20 mph × 5 h = 100 mi
The total displacement at 60 mph can be calculated as follows, assuming we can ignore the displacement as we accelerate from 20 to 60 mph,
Δx₂ = v₂ × t₂ = 60 mph × 1 h = 60 mi
So, the total displacement during all the trip will be:
Δx = Δx₁ + Δx₂ = 100 mi + 60 mi = 160 mi
We calculate the average velocity for the 6-hour period as follows,
v = Δx / Δt = 160 mi / 6 h = 26.7 mph
Thus, the required average velocity is calculated to be 26.7 mph.
The question is incomplete. The complete question is 'On a straight road with the +x axis chosen to point in the direction of motion, you drive for 5 hours at a constant 20 miles per hour, then in a few seconds, you speed up to 60 miles per hour and drive at this speed for 1 hour.'
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a barometric pressure of 1021.0 millibars is equal to how many inches of mercury?
A barometric pressure of 1021.0 millibars can be converted by using:
1 millibar = 0.02952998751 inches of mercury.
To convert 1021.0 millibars to inches of mercury, multiply 1021.0 by 0.02952998751
1021.0 millibars * 0.02952998751 inches of mercury/millibar = 30.0062 inches of mercury.
What is barometer used for?A barometer is an instrument used to measure atmospheric pressure, also known as barometric pressure. There are two main types of barometers: mercury and aneroid barometers.
What is barometric pressure?Barometric pressure is the force per unit area exerted by the weight of the atmosphere on the surface of the Earth. It is an important aspect of weather, as changes in barometric pressure can indicate changes in weather patterns, such as the approach of a storm.
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a sample of vegetable oil with density 915 kg/m3 is found to have a mass of 46.9 g. find the volume of this sample.
the volume of the sample of vegetable oil is [tex]5.13 * 10^-5 m^3.[/tex]
The density and mass of a sample of vegetable oil can be used to determine its volume. To determine volume, use the following formula:
V = m / ρ
where V stands for volume, m for mass, and for density.
Given that the mass of the vegetable oil is 46.9 g and its density is 915 kg/m3, the volume may be calculated as follows:
The mass need first be converted from grams to kilograms:
0.0469 kg is equal to m = 46.9 g * 1 kg/1000 g.
Next, determine the volume using the following formula:
V = m / V = 0.04690 kg / 915 kg/m3 V = 0.04690 kg / 915 V = [tex]5.13 * 10^-5 m^3.[/tex]
Therefore, the sample of vegetable oil has a volume of [tex]5.13 * 10^-5 m^3.[/tex]
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if you set up two sound speakers one playing a note of frequency 100 hz and one playing a note of frequency 90 hz, what are the beat frequency and the beat period?
The beat frequency is 10Hz and the beat period is 0.1s when two sound speakers one playing a note of frequency 100 Hz and one playing a note of frequency 90 Hz.
Given frequency of first note (f1) = 100Hz
Frequency of second note (f2) = 90Hz
The difference in frequency between two waves is known as the beat frequency. It is as a result of both positive and negative interference. While we understand the beat frequency to be the rate at which the volume of the sound changes, we understand the regular frequency of the waves to be the pitch of the sound.
Beat frequency = f1 - f2 = 100 - 90 = 10Hz
The beat period is the space of time between two successive maxima or minima. Additionally, it is equivalent to the beat frequency's reciprocal.
The beat period = 1/10 = 0.1s
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the scientist who worked out the mathematics of the connections between electricity, magnetism, and light in the 19th century was: a. wilhelm wien b. isaac newton c. albert einstein d. james clerk maxwell e. ludwig boltzmann
The scientist who worked out the mathematics of the connections between electricity, magnetism, and light in the 19th century was James Clerk Maxwell.
James Clerk Maxwell (1831-1879) was a Scottish physicist and mathematician who made major contributions to the fields of electromagnetism and statistical mechanics. He is best known for his formulation of the four Maxwell's equations, which describe the behavior of electric and magnetic fields and their interaction with matter.
These equations provide the foundation for our understanding of electromagnetism, and have had a profound impact on modern technology, from radio and television to computers and smartphones.
Maxwell also developed the kinetic theory of gases, which explains the behavior of gases in terms of the motion and interactions of their constituent particles. He proposed that the temperature of a gas is related to the average kinetic energy of its particles.
Hence, the correct option is D.
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