Disk 2 has the bigger moment of inertia, two different spinning disks have the same angular momentum, but disk 1 has more kinetic energy than disk 2.
What is the significance of inertia in the law of motion?Inertia causes a moving item to remain in motion at the same velocity (speed and direction) until acted on by a force. Everyday examples of the Law of Inertia (Inertia of Motion) People slump forward when the bus abruptly stops. When a bus driver abruptly applies the brakes, the lower part of the body comes to rest with the bus, but the upper section of the body continues to move forward due to inertia of motion. The Law of Inertia asserts that unless acted upon by an unbalanced external force, objects will remain at rest or move in a straight path in uniform motion.
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a 4.0-g string is 0.39 m long and is under tension. the string vibrates at 600 hz in its third harmonic. what is the tension in this string?
The tension on a 4g string in its third harmonic would be 250N
Why is this motion called harmonic?Because musical instruments create vibrations that match to sound waves in the air, the motion is known as harmonic.
Harmonic motion is caused by what force?When a force according to Hooke's law is present and there is no friction, the simplest of all vibrations happens. The model we will use to describe vibrations in musical instruments is known as simple harmonic motion.
What are the benefits of harmonic motion?In order to model oscillations, such as those in wind turbines and vibrations in car suspensions, simple harmonic motion is crucial in research.
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A cannonball is fired horizontally from the top of a cliff. The cannon is at height H = 100 m above ground level, and the ball is fired with initial horizontal speed v0 . Assume acceleration due to gravity to be g = 9.80 m/s2 what is the y position of the cannonball when it is at distance d/2 from the hill? if you need to, you can use the trajectory equation for this projectile, which gives y in terms of x directly:y y=H−gx22v20x
Now When the cannonball's x position is 100 meters and its y position is 25 meters below the launch site, this (75 m above the ground).
What type of force is gravity?An mass-laden object attracted another item with mass. The strength of the force is proportional to the densities of the two surfaces and inverse to the square of the length between the two.
What is the name for gravity?All material particles of matter are subject to gravity, commonly known as gravitation. The pull of gravity tends to pull any two items or particles with nonzero mass toward one another.
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Figure 9-24 shows an overhead view of four particles of equal mass sliding over a frictionless surface at constant velocity. The directions of the velocities are indicated; their magnitudes are equal. Consider pairing the particles. Which pairs form a system with a center of mass that (a) is stationary, (b) is stationary and at the origin, and (c) passes through the origin?a) Pairs from the system with a center of mass that is stationary are ac,bc and dc.
b) Pairs from the system with a center of mass that is stationary and is at the origin are bc
c) Pairs from the system with a center of mass that passes through the origin are ad and bd
The stationary and at the origin is, a) the pairs ac, bc, and dc have stationary centers of mass, b) The pair at the origin with the stationary center of masses is denoted by the symbol bc, and c) Ad and bd are the pair with the center of mass passing through the origin.
What is frictionless surface?A surface is said to be frictionless if it has a force acting on any object that is almost zero or negligible, meaning that there is no resistance between the surface and the substance, allowing the object to slide and move freely without any friction.
Therefore,
The given data
Coordinates of the four particles are:
[tex]&a=(-4 \mathrm{~m}, 2 \mathrm{~m}) \\[/tex]
[tex]&\mathrm{b}=(4 \mathrm{~m}, 2 \mathrm{~m}) \\[/tex]
[tex]&\mathrm{c}=(-4 \mathrm{~m},-2 \mathrm{~m}) \\[/tex]
[tex]&\mathrm{d}=(4 \mathrm{~m},-2 \mathrm{~m})[/tex]
Having an understanding of the center of mass. The exact center of the tile connecting two particles with equal masses is where their centers of mass are located. Two particles' centers of mass will be stationary if they are moving at equal speeds but in opposite directions. We have taken the two masses in the diagram and compared their velocities to find where their centers of mass are located.
a) system pair calculations with a stationary center of mass
Particles a and c are depicted in the illustration as having the same speed but moving in the opposite direction. This indicates that the centers of mass for pairs a and c are fixed.
Particles b and c are depicted in the illustration as having the same speed but moving in the opposite direction. This indicates that the mass centers of the pairs b and c are stationary.
Particles d and c are depicted in the figure as having the same speed but moving in the opposite direction. This indicates that the centers of mass for the pairs d and c are stationary.
Therefore, the pairs ac, bc, and dc have stationary centers of mass.
b) system pair calculations with the center of mass at rest and the origin
The origin will be crossed by the line formed by the particles b and c. The line connecting particles b and c will have the origin as its midpoint because both are equally spaced from the origin.
Two particles' centers of mass will remain stationary if they are travelling at equal speeds but in opposite directions.
The pair at the origin with the stationary center of masses is denoted by the symbol bc.
c) system pair calculations when the center of mass crosses the origin
If we draw a line connecting the particles a and d, that line will pass through the origin. As an example, take the pair of particles a and d. The origin will be the midpoint of the line connecting particles a and d because both are equally far from the origin.
They will pass through the origin as they move with some speed in the indicated direction. If we draw a line connecting the two particles b and d, that line will be parallel to the y-axis. Their midpoint will be on the x-axis because both are equally spaced from it. They will pass through the origin as they move with some speed in the indicated direction.
Ad and bd are the pair with the center of mass passing through the origin.
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a 12.5 kg shell acquires a speed of 650 m/s as it leaves a gun barrel 3.4 m long. what force was used to propel the shell?
The force used to propel the shell would be 8125N at 12.5kg mass and 650m/s speed.
What is the definition of force?The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
Who First Discovered Force?Isaac Newton's three laws of motion, which are outlined in his Principia Mathematica, are frequently used to illustrate the concept of force (1687).
Why is studying force important?Motion and force play significant roles in daily living. Students will discover how these physical factors affect their lives and careers as they study this unit. Students will learn about forces like friction, gravity, and magnetic force from the lessons and activities.
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Can rocks be magnetized?.
Studies investigated that rocks in their natural environment in shallow layers of Earth's crust are heated there naturally and can become magnetized.
3 foremost minerals (magnetite, pyrrhotite, and ilmenite) are strongly interested in a magnet. Two varieties of rock – serpentine and ironstone are nearly usually magnetic.
As magma or lava cools, those minerals start to shape. At this point, the molten rock has no longer completely solidified, so the magnetic minerals floating inside the molten mass, end up aligned with the magnetic subject.
Water is discovered in interior rocks nearly anywhere, even very deep underneath the earth's floor where it's far particularly warm. The water inside hot rocks may be very warm as well, and when this fluid comes to the earth's floor, it may generate electricity.
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An object of mass m is hanging by a string from the ceiling of an elevator. The elevator is moving up at constant speed. What is the tension in the string?.
The tension in the string, when the elevator is moving with constant speed is equal to the product of mass and gravitational force.
Tension is the pulling force carried by the flexible mediums like ropes, cables and string.
The tension in the body caused by the weight of the hanging body is the net force acting on the body.
For a body of mass (m) suspended on a string, the tension force of the string can be entered in three ways,
The tension in the string when the body is at rest or moving at a constant speed. At rest, the tension will be the product of the gravitational force times time. It can be given as, T = mg.Tension in the string when the body is moving upwards. When the body is moving upwards, both gravitational force and acceleration force are acting on it and the magnitude of the tension will be due to the sum of the two forces. This can be written as, T = m(g + a).Tension in the string as the body moves down. As the body moves down, differentiate the gravitational and acceleration forces acting on it. It can be given as, T = m(g - a)Because the object is hanging by a string from the ceiling of the elevator and the elevator is moving upward at a constant speed.
As the elevator moves at a constant speed. Thus, the magnitude of the tension in the string, T = mg.
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Explain why Bob would conclude the emissions of the two signals occurred at different times even though they are simultaneous to Alice. Note that this explanation is neither simple nor straightforward, so explain your logic step by step and as clearly as possible. State clearly when you are using the postulates of special relativity.
When Bob wants to send a message to Alice he uses his copy of her public key to encrypt the message. Alice uses her securely-stored private key to perform the decryption.
Alice and Bob each publish a public encryption key, which allows anyone to send them an encrypted message. But they keep secret the corresponding decryption keys, so that only they can read the messages they receive.
Alice and Bob use a key exchange algorithm such as Diffie-Hellman-Merkle, to securely agree on an ephemeral session key. They use the keys from step 1 only to authenticate one another during this process.
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consider an rl circuit; a battery, an inductor, and a resistor connected in series. the circuit is connected at t
The inductors coil's resistance ("R") is the DC resistance value of the copper twists or loops that make up the coil.
Why does resistance exist?When electrons pass through a conductors, such a metal wire, an electric current occurs. The ions inside the metal may clash with the travelling electrons. Resistance is created as a result, making it more challenging for the flow of the current.
How is resistance measured?By utilizing Ohm's Law to measure the current and voltage, resistance may be computed. As a result, if the observed current and voltage values are known, the resistance value of a circuit may be calculated. Ohm's Law is the measurement principle used by analog and digital multimeters to measure resistance.
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a fluid exists at constant pressure. if the volume doesn't change with temperature, can natural convection occur with the fluid?
At constant pressure, a fluid is present. Natural convection with the fluid won't happen if the volume doesn't change with temperature. Free convection, commonly referred to as natural convection.
Following the cessation of heating, mixing and conduction brought about by this natural convection eventually provide a nearly homogenous density and consistent temperature. Only forced-convection modes function in the absence of gravity (or other factors that produce a g-force of any kind).
Natural convection, also known as free convection, is a mechanism or type of mass and heat transfer in which fluid motion is produced solely by density differences in the fluid that arise as a result of temperature gradients, not by any external source.
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A closed system consists of a pendulum that is swinging back and forth. If the pendulum's kinetic energy decreases, what else must happen to the energy of the system?.
It needs to have more gravitational potential energy.
When a pendulum stops swinging, what happens to its energy?The swing slows down as its kinetic energy decreases. The swing comes to an end once all of its mechanical energy has been transformed into heat energy. It no longer possesses kinetic or potential energy. However, the system's overall energy remains constant.
What happens to the kinetic energy when the pendulum swings to the opposite side?The kinetic energy of the pendulum bob is now decreasing from this maximum value as it swings past the bottom, and will continue to do so until gravity completely transforms it back into potential energy.
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True or false? the blue radius is perpendicular to the green chord. A. True b. False.
True, The blue line (radius) is perpendicular to the green line (chord).
What is a Perpendicular line?Perpendicular lines are lines that intersect at a right (90 degrees) angle. This lines are often normal to another line. So a perpendicular line at an angle of 90° to a given line, plane, or surface.
From the given diagram, the blue line (radius) is normal to the green chord.
That is the blue line cuts the green line at 90 degrees, so both lines are perpendicular to each other because the angle between them is 90 degrees.
Thus, we can conclude that the given statement about the blue line (radius) and the green line (chord) is TRUE.
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Answer: False
Explanation:
I just took the quiz and the answer was false for the numbers 7.1 and 7.3
What method can be used to convert length measurements between english and metric?.
The term "metric system" refers to a set of formulas used to determine an object's mass, length, and volume.
Which metrics are fundamental?The inch, foot, yard, and mile are the foundational units for measuring length or distance in the English system. Rod, furlong, and chain are some other units of length. foot of the survey The English metric system normally measures areas in square feet or square yards.
What are the four forms of measuring?Four distinct measuring scale types are seen (nominal, ordinal, interval and ratio). The information about the variables being assessed that is provided by each of the four scales is often more than that of the scales that come before it.
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List the states of matter in order = of increasing entropy: List the solids Au; Al, C in order of increasing entropy at 258C: Explain why more complex molecule like NO has higher entropy than Ar:
The increasing order of entropy of state of matter is Solid < Liquid < Gas and the of the solid is C < Al < Au, and NO has higher entropy because of the greater complexity in molecule.
The entropy of a substance can be defined as the degree of randomness of the substance.
Among, solid liquid and gas,
The state of matter in increasing order of entropy are,
Solid < Liquid < Gas.
The entropy of the substance depends on the molecular mass of the substance, so, among Au, Al and C,
The increasing order of entropy is C < Al < Au.
Among NO and Ar, Complex molecule like NO has higher entropy because of the presence of more bond and more number of electrons.
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a block of mass 5.70 kg sits on top of an incline at an angle of 20.0 to the horizontal. the height of this object from the ground h= 1.10m
Kinetic friction is the name given to the force that exists between moving surfaces.
Kinetic Friction: What is it?The force that prevents an object from moving when it is sliding is known as friction. Because of kinetic friction, it is impossible for two or more things to move together at once.The force acts in the direction that an object would prefer to slide, not the opposite.Friction is produced when we apply the brakes to a moving vehicle in order to stop it. The Greek letter "mu" with the subscript "k" stands for the kinetic friction coefficient.A body is subjected to k times the usual force due to kinetic friction. It is quantified in Newtons (N).The following formula for calculating kinetic friction: (Kinetic friction coefficient) = (Kinetic friction force) (normal force).The following sentences provide descriptions of the two main types of friction: Constant Resistance and Kinetic Friction.The block's mass is 5.70 kg, and the incline's height is 1.10 meters. This is the gravitational potential.(Complete Question: In Figure 853, a block with mass m=2.5 kg enters a spring with spring constant k=320 N/ m. By the time the block comes to a stop, the spring is crushed by 7.5 cm. Kinetic friction between floors and blocks has a coefficient of 0.25. What are the blockfloor system's increased thermal energy and the work the spring force performs when the block is in contact with the spring and being brought to rest? How quickly does the block move toward the spring?
Solution: For x=0.075m and k=320N/m, Eq. 726 yields Ws =[tex]-\frac{1}{2} kx^{2} =-0.90J[/tex]. For later use, this is equivalent to what ΔU is opposite of.(b) We find that FN = mg when we study forces, which implies that [tex]F_{k}= m_{k}F_{N}=m_{k}=mg[/tex].When d=x, Eq. 831 yields : Δ[tex]E_{th} =f_{k}d=m_{k}mgx=(0.25)(2.5)(9.8)(0.075)=0.46J[/tex].(c) The initial kinetic energy is given as [tex]K_{i} =[/tex]Δ[tex]U+[/tex]Δ[tex]E_{th} =0.90+0.46=1.36J[/tex] which results in [tex]V_{i} =\sqrt{x2K_{i}/m } =1.0m/s[/tex] )To learn more about Friction refer to:
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the work w0 accelerates a car from 0 to 50 km>h. (a) is the work required to accelerate the car from 50 km>h to 150 km>h equal to 2w0, 3w0, 8w0, or 9w0? (b) choose the best explanation from among the following: i. the work to accelerate the car depends on the speed squared. ii. the final speed is three times the speed that was produced by the work w0. iii. the increase in speed from 50 km>h to 150 km>h is twice the increase in speed from 0 to 50 km>h.
A car is accelerated by the work from zero to 50 km/h. accelerating the car from requires 8wW0 of work.
What is a work?When pressure is applied along a displacement, work is indeed the energy that is either added to or subtracted from an item. In its basic form, it equals equal product of the force's magnitude and the travel distance for a force applied directed in the same direction as the motion.
What is the work unit in the SI?The joule is the Si derived unit of labor (J). It is described as the work accomplished over a one-meter distance by a pressure of one newton. A produce a satisfactory is something that candidates are asked to bring to a job interview, like an example of their writing or editing.
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A Boeing 747 aircraft has a landing speed of 72 m/s, and upon landing it is able to come to a stop in 2,000 m. Assuming constant deceleration, how long would it take for a Boeing 747 to come to a full stop
It takes 55.56 s for the aircraft to stop.
Solution:
t * 36 m/s = 2,000 m. So t = 2,000/36. t = 55.5555555…
We’ll round that to 56 seconds.
Deceleration is calculated by dividing the final velocity minus the initial velocity by the time it takes for this velocity to drop. Constant acceleration is defined as a change in velocity that does not change over time. The car speeds up by 20 miles an hour one minute, and another 20 miles an hour the next.
Average acceleration is constant at 20 mph per minute. Deceleration always refers to acceleration in the direction opposite to the direction of velocity. Delay always slows you down. Negative acceleration, on the other hand, is acceleration in the negative direction in the chosen coordinate system.
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What happens when two bar magnets attract each other?.
Magnets' oppositely polarized poles attract and repel one another. That the magnets repel one another is a known. We may conclude from this that the poles facing one another would be north-north or south-south.
When two magnets are brought close together, their opposing poles attract one another while their similar poles repel one another. Similar to how electric charges work. Different charges attract while similar charges repel. Magnets have been used for determining direction for a very long time because a free hanging magnet will always face north. Similar poles in magnets repel one another, while opposite poles are drawn together. So, when two magnets' north poles are placed close to one another, they will repel one another. polarized poles from two magnets that are brought close together interact. The Figure below shows how they interact. In contrast to two north poles, the north and south poles' lines of force are attracted to one another.
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Are diamonds found in the earth's crust?.
Yes, diamonds are found at depth of approximately 150-200km below the earth's crust. They are formed under conditions of intense heat and pressure that cause carbon atoms to crystallize.
Diamonds are acknowledged for their intense hardness, unmatched brilliance, and wealthy sentimental price. They're fabricated from almost a hundred% carbon atoms and are so long-lasting that the simplest another mineral that could scratch a diamond's surface is every other diamond.
Each carbon atom in a diamond carries 4 electrons in its outer shell, which might be shared by means of covalent connections with 4 other carbon atoms.
Diamonds are the earth's toughest natural substance. The simplest factor which could scratch a diamond is every other diamond! Diamonds form approximately a hundred miles below the earth and are carried to the surface by way of the volcanic hobby.
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an ideal gas expands isothermally performing work in the process calculate the change in internal energy of the gas
Since the ideal gas' internal energy is only dependent on temperature, it does not change during the isothermal process. Heat exchanged equals work completed.
What is work?In physics, the term "work" refers to the energy that is moved to or away from an item whenever a force is exerted along a displacement. For a constant force that is directed in the same direction as the motion, it is simplest expressed as the product of the force's magnitude and the distance traveled. The work performed by a force is defined as the product of the component of the force operating in the direction of the displacement and the displacement's magnitude. Formula. Work can be calculated using the formula below by multiplying force by the distance traveled in the force's direction. W = F × d.
What is the nature of work?The term "nature of work" refers to the kinds of tasks and responsibilities that may be assigned to you at work. The caliber of the work might demonstrate your qualifications and place within a corporation. The type of work and the level of work may be listed as the job description and the job title, respectively, when you look at job openings.
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A hoop of mass M and radius R rotates about an axle at the edge of the hoop.
The hoop starts at its highest position and is given a very small push to start it rotating. (Figure 1)
At its lowest position, what is the angular velocity?
Express your answer in terms of the given quantities and appropriate constants
At its lowest position, what is the speed of the lowest point on the hoop?
Express your answer in terms of the given quantities and appropriate constants.
At its lowest position, the speed of the lowest point on the hoop is √ 8 g R
U = m g h
U = Potential energy
m = Mass
g = Acceleration due to gravity
h = Height
Change in potential energy, ΔU = M g 2R
I = m r²
KE = I ω²
I = Moment of inertia
KE = Kinetic energy
ω = Angular velocity
Rotational kinetic energy of the hoop = Rotational KE of the hoop about its center + Rotational KE of the center of mass
Rotational KE of the hoop about its center = Rotational KE of the center of mass
KE = 1 / 2 M R² ω² + 1 / 2 M R² ω²
KE = M R² ω²
ΔU = KE
M g 2R = M R² ω²
ω = √ 2 g / R
v = r ω
v = 2 R √ 2 g / R
v = √ 8 g R
Therefore, at its lowest position, the speed of the lowest point on the hoop is √ 8 g R
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when 1 mole of ice melts to form 1 mole of liquid water at 0 c, 6kj of heat is removed from the surorunds. what is s for the surroundings
The entropy of the surroundings is 6 kJ/K.
What is entropy?
Entropy is a measureable physical characteristic and a scientific notion that is frequently connected to a condition of disorder, unpredictability, or uncertainty. From classical thermodynamics, in which it was originally recognised, through the microscopic description of nature within statistical physics, to the fundamentals of information theory, the phrase and concept are utilised in a variety of disciplines. It has numerous applications in physics and chemistry, biological systems and how they relate to life, cosmology, economics, sociology, meteorological science, and information systems, especially the exchange of information.
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there are very large numbers of charged particles in most objects. why, then, don't most objects exhibit static electricity?
There are very large numbers of charged particles in most objects. but still then, don't most objects exhibit static electricity because the charges present have equal numbers of positive and negative charges which makies the object electrically neutral.
How do you define static electricity?
A common electric phenomena called static electricity occurs when charged particles are transmitted from one body to another. An attractive force forms between two items, for instance, when two objects are rubbed together, especially if the objects are insulators and the air is dry around them. The one that gains electrons is negatively charged, whereas the one that loses them is positively charged.
There are just two different kinds of charge, positive and negative. The force between charges diminishes with the cube of the distance, with like charges repelling and unlike charges attracting.Protons carry the great majority of positive charge in nature, while electrons carry the vast majority of negative charge. One electron has an electric charge that is equivalent to one proton's in magnitude and sign.An atom or molecule is an ion if it possesses an unequal amount of protons and electrons, which results in a total charge that is more than zero.Protons and electrons have charges that are opposite in sign but equal in magnitude, and the SI unit for charge is the coulomb (C).
1 e = 1.6 x 10^-19 C
Bringing two neutral things into physical touch will allow you to separate any positive or negative charges that may be present. Rubbing the two objects together can also increase the charge separation by removing electrons from one object's bonds and transferring them to the other.
Positively charged items are depleted of electrons when they are positively charged, and the opposite is true for macroscopic objects.A closed system's net charge is constant, according to the law of conservation of charge.
Hence, we see that though a large number of particles contain charge sthey do not conduct as they are electrically neutral
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the current flow to a 120-volt load travels through the source (typically a transformer winding). assume this is a properly connected circuit.
The given statement is true, the current flow to the 120-volt load can travel properly in the connected circuit.
A critical observation to don't forget is that circuit breakers can most effectively take care of about 80% of their average amperage. meaning a fifteen-amp circuit breaker can manage around 12-amps and a 20-amp circuit breaker can cope with approximately sixteen amps.
The neutral includes the unbalanced load lower back to the supply. The grounded conductor is the only one that is deliberately grounded. within the maximum not unusual wiring systems for business flowers, industrial buildings, and home homes, the impartial is the deliberately grounded conductor.
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The following image is a cross section of an asymptotic giant branch star. Place each label in the correct position on the image.
core: non burning carbon
shell of core: burning helium
white shell: burning hydrogen
outside: non burning hydrogen
Core: non burning carbon
Shell of core: burning helium
white shell: burning hydrogen
outside: non burning hydrogen
What is an asymptotic giant branch star?
With a brightness up to thousands of times larger than the Sun, an asymptotic-giant-branch star will appear as a bright red giant.
Its interior structure is made up of a central, mostly inert core of carbon and oxygen, a shell where helium is undergoing fusion to form carbon (known as helium burning), a second shell where hydrogen is undergoing fusion to form helium, and a very large envelope of material with a composition similar to that of main-sequence stars (except in the case of carbon stars).
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What is the find kinetic energy of the car?.
The kinetic energy of a moving car object is KE=1/2mv².
Where mass is m and the velocity is v of the vehicle.
E = 1/2mv² describes how the mass and speed of a moving object affect its stored kinetic energy. Cars have twice as much kinetic energy when they are twice as heavy, and four times as much kinetic energy when they are twice as quick. The kinetic energy that is stored in the car must be released when it slows down. These little amounts of energy are used to heat the road, the environment, and different rotating car parts. However, when you stomp on the brakes, the vast majority of the kinetic energy is transformed into heat by the brake pads.
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Am object of ma 4 i thrown vertically upward from level ground with initial peed of 20. How high did the object go
The maximum height of the object when thrown at the speed of 20 m/s is 20 m.
What is speed?
Speed is the magnitude of the rate of change of the position of any object with time which is a scalar quantity. It is the ratio of speed by time with the unit m/s or cm/s.
The height this object can travel with initial speed of 20 m/s can be calculated as,
v^2 = u^2 + 2as
where v is the final velocity, u is the initial velocity a is the acceleration due to gravity s is height.
0 = 20^2 + 2 (-10) s
s = 400 / 20 = 20 m
Therefore, the maximum height the object can travel with initial speed of 20 m/s is 20m.
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What is the acceleration of the car in situations?.
Acceleration is the rate of change of speed as a feature of the time.
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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why when tuning a radio do you hear only one station at a time rather than hearing many stations at once?
We are able to hear only one station because of the specific associated with radio station that has a specific radio wave.
What all does a radio wave comprise of ?
The all radio waves are made up of three parts: wavelength, amplitude and frequency.
If the two waves (with the same amplitude) are shifted by exactly half a wavelength when they merge together, then the crest of one wave will match up perfectly with the trough of the other wave, and they will cancel each other out.
That is why every radio wave is assigned it's own amplitude and frequency length, so that when the device is turned on, only one radio station is audible.
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resistors r1 and r2 together use 63% of the total voltage. what is the voltage drop across resistor r3?
Answer:
The voltage drop across a resistor is the voltage value across a resistor. This is what we call .
The formula to calculate voltage drop is
V= I × R
Explanation:
What is a resistor and the voltage drop accross it?
A resistor, on the other hand is a device that offers resistance to the current flowing through it. If we apply Ohm’s law, the resistor offers a voltage drop across a resistive device and it is given as:
V(drop) = I × R
where, I = current through the resistor in (A) ampere
R = resistance in (Ω) ohms
V(drop) = voltage drop in (V) volts
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Which element is a solid at STP?.
The elements that are solid at STP are mentioned below.
An element is considered solid if
It has definite shape and volume. It particles are tightly packed and vibrate in placeIt has very high particle attractionAt STP 79 elements are solids up to uranium. Only some of them are non solid. Mercury is the only metallic element that is not solid. Mercury and bromine are liquid at STP. All noble gases and chlorine, fluorine, oxygen, nitrogen and hydrogen are gas at STP.
Therefore, the elements that are solid at STP are mentioned above.
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