A automobile engine that performs 500 j of effort in one cycle and has a thermal performance of 50% needs 1000 j of energy for input each cycle.
Energy in Example: What is it?Energy can take on a variety of shapes. Energy can take many different forms, such as light, heat, mechanical, electrical, acoustic, chemical, nuclear, or atomic energy.
Can you break energy?Energy can only be converted or moved through one form to another; it cannot be created or destroyed. For instance, kinetic energy is produced from chemical energy.
Briefing:Efficiency = (E out / E in) × 100%
E in = (E out / 50) × 100
E in = (500 / 50) × 100
E in = 1000j
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Which best describes the riders' final velocities ? gabriella is speeding up at the same rate that kendall is slowing down, and franklin is not accelerating. gabriella is slowing down at the same rate that kendall is speeding up, and franklin is not accelerating. gabriella and franklin are both slowing down, and kendall is accelerating. gabriella is slowing down, and kendall and franklin are accelerating.
"While Kendall is accelerating and Gabriella was slowing down in lockstep, Franklin is not doing so.
What does the term "acceleration" in physics mean?When an object accelerates, its acceleration also moves in the same direction as its velocity. This indicates that the situation is developing. Example B shows an object moving in reverse while accelerating (i.e., having a negative velocity).
What do you call something that accelerates?By dividing that velocity change but by time it takes for change to occur, acceleration is determined. Similar to velocity, acceleration has a direction. When something speeds up, it moves more quickly in the area it is moving.
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Some asteroids contain molecules of carbon. There are a total of 1.708 x 1010 carbon molecules in a particular asteroid belt.
If each asteroid contains 6.1 x 105 molecules of carbon, how many asteroids are in the asteroid belt, written in scientific notation?
A few tens of meters across, or around the size of a home, and smaller asteroids are frequently referred to as meteoroids, however the option may vary slightly depending on the situation.
Explain the nature of asteroids.
Asteroids are rocky, airless pieces of the solar system's early formation, which took place about 4.6 billion years ago. They are also referred to as minor planets. As of this time, 1,113,527 asteroids are known. the visible cosmos
How many asteroids have impacted Earth?
Based on rates of crater creation discovered on the Moon, the Earth's closest astronomical neighbour, astronomers have calculated that 60 objects with a diameter of at least 5 km (3 mi) had struck the Planet inside the preceding 600 million years.
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the source of all magnetism is * 1 point a) tiny pieces of iron. b) tiny domains of aligned atoms. c) ferromagnetic materials. d) moving electric charge.
According to the claim, all magnetism originates through moving electric charge.
What are 2 examples of magnetism?There are always two magnetic poles. Stainless steel, iron, nickel, cobalt, and several rare earth metals are a few examples of magnetic materials. An magnetic field weakly repels diamagnetic materials like copper and gold. An magnetic field has a weak attraction for paramagnetic materials like calcium and aluminum.
Why is magnetism important?Mathematically, Maxwell demonstrated how a shifting magnetic field generates a shifting electric field (and vice versa). As a result, magnetism is crucial because it helps humans produce electrical energy. In actuality, spinning magnets are the source of the majority of the energy we consume today.
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a block attached to a spring is oscillating with an amplitude of 10cm. what will be the block's amplitude if its total energy is quadrupled?
A block is attached to a spring is oscillating with an amplitude of 10 cm. If its total energy is quadrupled, the amplitude of resultant periodic motion becomes 16 times.
The position of block over time is given by the equation:
x(t) = A cos(ωt + Ф)
where, A is the amplitude
ω is the angular frequency
Ф is the angle
The total energy of the oscillation or periodic motion is stored as the potential energy. It is given by the equation, E = 1/2 * k * x²
where, k is the spring stiffness
Hence, the total energy is directly proportional to the square of the amplitude.
E ∝ A²
which means that, if energy is doubled the resultant amplitude of the periodic motion is 2² of quadrupled.
Similarly, if the total energy is quadrupled, the amplitude will be 4² times or 16 times.
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1. What is the atomic mass of the new atom?
2. What is the atomic number of the new atom?
3. What is the atomic symbol of the new atom?
4. What type of decay is demonstrated here?
1. The atomic mass of the new atom be 252. Option (d) is correct.
2. The atomic number of the new atom be 100. Option (j) is correct.
3. The symbol of the new atom be Fm. Option (e) is correct.
4. Beta decay is demonstrated here. Option (g) is correct.
What is Beta decay?In a process known as beta decay, a proton inside the radioactive sample's nucleus is converted to a neutron or vice versa. The radioactive sample's nucleus is able to reach as close as feasible to the ideal neutron/proton ratio thanks to processes like beta decay and alpha decay.
The nucleus releases a beta particle, which can either be an electron or a positron, in the process. Consider the possibility that either a proton or a neutron could transform into another particle. The law of charge conservation is followed by the generation of the electron and the positron. Weak interaction results in beta-decay.
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as a result of the expansion, how do the average distances between galaxies in the distant past compare to the average distance between them today?
As a result of the expansion, parallax method is the way to compare the average distances between galaxies in the distant past and average distance between them today
Radio telescopes are used by astronomers all over the world to study the naturally occurring radio waves that are emitted by stars, planets, galaxies, clouds of dust, and gas molecules. For the most part, we are all familiar with visible-light astronomy and the information it provides about these objects. What we see with our eyes is referred to as visible light or optical light.The parallax method can be used to determine how far away nearby stars are. Over a period of six months, the position of the star in the sky is measured twice (e.g. g. both in the spring and in the fall). In contrast to stars further away, this one will seem to have moved. The same effect can be produced by holding your arm out in front of you and looking at your thumb with your left eye first, then your right eye later. The thumb will appear to leap in front of the background. The distance to the star can be calculated with ease by measuring the angle the star has shifted and knowing the radius of Earth's orbit.[tex]\alpha =L/x\\\\x=\sqrt{1-\frac{a}{y} } \\\\\alpha =\frac{L}{\sqrt{1-\frac{a}{y} }}[/tex]To study more about visible-light astronomy -
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you perform 100 j of work on a refrigerator that extracts heat from a cold reservoir and dumps heat into a hot reservoir. the amount of heat dumped into the hot reservoir must be
a. equal to 100 J
b. less than 100 J
c. greater than 100 J
The amount of heat that is dropped in the hot reservoir is equal to 100 J. Option A
What is the first law of thermodynamics?According to the first law of thermodynamics, we know that energy can neither be created nor destroyed but can be converted from one form another.
We can see that as the heat is transferred from the we do some work so as to be able to extracts heat from a cold reservoir and dumps heat into a hot reservoir. Since heat can neither be created nor destroyed, the heat that is dumped must be equal to the amount of heat that is extracted.
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what is scientific law
Answer: A scientific law describes a natural occurrence, but doesn't attempt to clarify how the event occurs. Or there is an 'if, then' statement that can be made and tested.
Answer: Scientific law are principles that are accepted by an overwhelming majority of scientists. Scientific laws or laws of science are statements, based on repeated experiments or observations, that describe or predict a range of natural phenomena.
Explanation: Hope this was helpful
newton's second law in 1 dimension: a 40-kg crate is being lowered with a downward acceleration is 2.0 m/s2 by means of a rope. (a) what is the magnitude of the force exerted by the rope on the crate?
The magnitude of force exerted by the rope on the crate is 312 N.
From Newton's second law of motion, we know the expression of force as,
F = m * a
where, m is mass
a is acceleration
Given that, mass of the crate is 40 kg
Acceleration is 2 m/s²
The net force that the rope is applying to the card while it is sliding downward is given by,
F = m(g - a)
Substituting the values,
F = 40(9.8 - 2)
F = 312 N
Thus, the net force exerted by the rope on the crate is 312 N.
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all frictional forces are considered to be negligible. what distance does the object fall 10 s after it is released from rest? responses 3 m
The distance can be calculated as 490m .
We are given that,
Time = t = 10s
Initial velocity = u = 0
Acceleration due to gravity= g = 9.8m/s²
Suppose v is the final velocity. Where "t" stands for time, "s" for distance, "u" for starting velocity, and "g" for the acceleration brought on by gravity. Currently applying the second Newtonian equation for motion,
s = ut + 1/2 gt²
Putting the values in above equation ,
s = 0 + 1/2 (9.8)(10)(10)
s = 1/2 × 980
s = 450m
In this case, the distance is 490 m.
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Select the circle containing inaccurate information that does not align with the big bang theory.
It is incorrect to say in the first circle that "Only space existed," as this contradicts the big bang idea.
The Big Bang hypothesis describes how the universe suddenly appeared and started to grow from a single, infinitely tiny, infinitely hot, and endlessly dense point.
The First Circle's claim that "Only space existed" is false and contradicts the big bang theory, it can be concluded.
What is big bang theory?
The dominant theory used to explain how the cosmos got its start is called the Big Bang Theory. Simply expressed, it states that throughout the course of the following 13.7 billion years, the universe as we know it expanded and contracted from an impossibly hot and dense single point to the still-expanding cosmos we observe today. This expansion and contraction occurred at first at unfathomable speeds.
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which of the following is true regarding the masses of antimatter particles? which of the following is true regarding the masses of antimatter particles? the mass of an antimatter particle is the negative value of that of its corresponding matter particle. the mass of an antimatter particle is always larger than that of its corresponding matter particle. the mass of an antimatter particle is the same as that of its corresponding matter particle. antimatter has no mass. the mass of an antimatter particle is always lower than that of its corresponding matter particle.
Regarding the masses of antimatter particles, the true statement is: A. The mass of an antimatter particle is the negative value of that of its corresponding matter particle.
Matter and AntimatterMatter is any substance made up of particles that takes up space by their volume and also have mass. Meanwhile, antimatter is a particle made up of antiparticles of the corresponding ordinary particles. One of the differences between matter and antimatter is the charge of their mass. An antimatter has the opposite electric charge of its corresponding matter. So, it is safe to say that the mass of an antimatter particle is the negative value of its corresponding particle.
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two bodies A and B are moving with a velocity of 6m/s and 8m/s along the horizontal and the vertical directions respectively.what is the relative velocity of body A respect to body B.
URGENT PLEASE ANSWER
A box takes 40 N to start moving when the coefficient of static
friction is .54. What is the weight of the box?
A.18 N, B.98 , C.81 N, D.74 N
Answer:
D. 74
Explanation:
40/.54= 74
an 5-kg object sits on a frictionless incline that makes an angle 26 degrees with the horizontal. find the magnitude of the acceleration of the object.
An object weighing 5 kg is perched on a smooth incline that slopes at a 26-degree angle to the horizontal. The amplitude of the object's acceleration is given by F>mg sin26.
What is an explain acceleration?The rate where the direction of movement change over time is referred to as acceleration. Anything is said to be rushing when that goes faster or slower.
What three forms of acceleration are there?The three main types of propelled motions are regular accelerated, non-uniform velocity, and points of data. The motion in which an item moves in a single direction while increasing in velocity at regular intervals is referred to as uniform acceleration.
Briefing:F = ma
F - mg sin26 = ma
a = F - mg sin26/m
a = F/m - gsin26
which implies, F>mg sin26.
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A woman does 236 J of work
dragging her trash can 24. 4 m to
the curb, using a force of 18. 9 N.
At what angle was her force
directed?
(Unit = degrees)
According to the given statement is the 59.21° angle was her force directed.
What is a force?The word "force" has a specific meaning in science. At this level, calling a force a shove or a pull is entirely appropriate. A charge is not really something an object "has in it" or that it "contains." One thing experiences a force from another. Living organisms or inanimate objects are not the only things that can be considered forces. Every time two items interact, a force is exerted on every one of the objects. The force is no longer felt by the two objects when the interaction ends.
Briefing:Work done = force × distance
236J = 18.9cos(o) × 24.4
236/24.4 = 18.9cos(o)
(0.5117)cos^-1 = (o)
59.21°
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what refers to a type of cable composed of four copper wires twisted around each other within a plastic sheath?
Twisted-pair wiring is a category of cable that is comprised of four copper cables that have been wound around one another and encased in a plastic sheath.
What purpose does a twisted pair cables serve?Also with copper wires, twisted-pair cables were some of the first guided transmission medium. Twisted-pair cables are utilized in a variety of networking and communication applications today, including local area networks, digital subscriber lines, and phone lines.
Where can you use twisted pairs?The common copper cable known as twisted pair is used to link residential and commercial systems to the phone provider. Two copper pipe wires are wound around each other in a spirally to minimize electromagnetic induction or crosstalk between pairs of wires. Twisted pair connections require both wires for each connection.
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Why does the Earth have gravity?
Answer:
All its mass makes a combined gravitational pull on all the mass in your body.
Explanation:
Basically anything with mass has gravity
A rugby player is moving at an initial speed of 2 m/s and takes a distance of 20 m to accelerate to 6 m/s. Calculate the acceleration of the rugby player.
Answer should include detailed steps!
The final velocity of the rugby player is 15.62m/s.
Explain what an acceleration is.Acceleration is the rate of change in both speed and direction of velocity over time. When something moves faster or slower in a straight line, it is said to have been accelerated.
Meter per second per second (m/s2) is the unit of acceleration. Definition. The force known as the snewton is that which, when applied to a mass of one kilogram, results in an acceleration of one metre per second per second.
Given,
Initial velocity u = 2m/s
distance s = 20 m
acceleration a = 6 m/s
v² = u²+ 2as
v² = 2² + 2×6×20
v² = 4+240
v² = 244
v = √244
v = 15.62m/s.
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Complete question is "A rugby player is moving at an initial speed of 2 m/s and takes a distance of 20 m to accelerate to 6 m/s. Calculate the final velocity of the rugby player."
How much force does it take to move a 35Kg box at an acceleration of 1.5 m/s2?
Answer: Fa = 52,5N
Explanation: The force that causes an object to move is called Force of application which is calculated by the formula Fa = m × a (Force of application = mass multiplied by the acceleration)
=> Fa = m × a
Fa = 35kg × 1.5m/s²
Fa = 52.5N
which statement is true about an object that is traveling in uniform circular motion? group of answer choices the net force on the object is directed away from the center of the circular path.
The statement that is true about circular motion is that; the net force on the object is directed toward the center of the circular path. Option D
What is the circular motion?We know that the circular motion is the kind of motion that occurs along a circular path. We know that in a circular motion, the direction of the motion is also important.
Now we know that the whirling of a stone around a circular path is one of the very typical examples of a circular motion in the context of our discussion here.
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Which statement is true about an object that is traveling in uniform circular motion? O A. The speed of the object varies. O B. The direction of the object's velocity is constant. OC. The net force on the object is directed away from the center of the circular path. O D. The net force on the object is directed toward the center of the circular path.
From what height above the surface of the earth should an object be dropped to initially experience an acceleration of 0.54g? (G=6.67x10^-11 N*m^2/kg^2, M-earth = 5.97x10^24kg, R-earth = 6.38x10^6m)
The height above the surface of the earth should be [tex]2.294 * 10^{6} m[/tex].
The Acceleration due to earth gravity is known as the acceleration due to gravity. It means when an object falls from a certain height towards the surface of the earth, its velocity changes. The change in velocity produces the acceleration in the object is called the gravitational acceleration
We know that acceleration due to gravity at height h is given by : [tex]g' = GM/(R+h)^{2}[/tex]
Where, G = gravitational constant = [tex]6.67 * 10^{-11}[/tex]
M = mass of earth = [tex]5.97 * 10^{24} kg\\[/tex]
R = radius of earth = [tex]6.38 * 10^{6} m[/tex]
h = height
Given g' = 0.54
Putting these values in above equation we get h = [tex]2.294 * 10^{6} m[/tex]
i.e. to experience an acceleration of 0.54g , the object should be at [tex]2.294 * 10^{6} m[/tex] above the earth's surface.
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if the planets pull on the sun as much as the sun pulls on the planets, why are we able to approximate the sun as a fixed position when studying the planetary orbits?
If the worlds pull it on sun more than the sun does on the planets, then the above statement is true because of sun's acceleration is significantly smaller.
What is the name of the sun?Even though it is a star, and our own local star at that, our sun lacks a widely used and distinctive English proper name. We English people just refer to it as the sun. English speakers occasionally refer to our sun as Sol.
What really is sun in living?It emits heat and light, also known as solar energy, which enables life to live on Earth. To flourish, plants require sunshine. Humans and other animals alike depend on plants for nourishment as well as the oxygen they release. Earth would freeze absent solar heat.
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18. which factor does not significantly affect the amount of solar energy reaching the surface of earth?
Factor that does not significantly affect the amount of solar energy reaching the surface of earth is : distance between earth and sun.
What is the solar energy reaching the surface of earth?Solar radiation that reaches surface of the Earth without being diffused is called direct beam solar radiation. Sum of the diffused and direct solar radiation is called global solar radiation.
Rotation of earth also does not affect the amount of solar radiation received at the Earth's surface. Tilt, orientation, latitude, and climate can have great impacts on a solar system's performance.
Solar energy is generated by the nuclear reaction within the sun and this energy reaches the surface of the earth in the form of electromagnetic radiation.
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a 200 kg weather rocket is loaded with 100 kg of fuel and fired straight up. it accelerates upward at 30.0 m/s2 for 30.0 s, then runs out of fuel. ignore any air resistance effects.
a) What is the rocket's maximum altitude?b) How long is the rocket in the air?c) Draw a velocity vs. time graph for the rocket from lift-off until it hits the ground.
a). the rocket's maximum altitude is 54.8km .
b). the rocket in the air 227.6 s
Calculation :
Given data
The mass of the rocket is mr=200kgThe mass of the fuel is mf=100kgThe acceleration is ao=30m/s²The time period is t1=30sThe expression from the equation of motion can be given as,
v₁²−v²=2gs1......(1)
The velocity during the first phase can be calculated as,
v1=vo+at1
v1=0+(30×30)
v1=900m/s
(a)
The altitude attained during first phase can be calculated as,
s1=v²₁ / 2a
s1=900/(2×30)
s1=13500m
Substituting the values in equation 1 for distance travelled during second phase,
(900)²−0=2×(9.8)×s₂
s2=41326.5m
The maximum altitude attained by rocket can be calculated as,
s=s1+s2
s=13500+41326.5s
=54826.5m
s=54.8km
(b)
The total time period can be calculated by the expression,
t=ta+td......(2)
The time taken in second phase of the motion can be calculated as,
v=v1+gt2
0=900−(9.8)t2
t2=91.8s
The time of ascent can be calculated as,
ta=t1+t2
ta=30+91.8
ta=121.8s
The time of descent can be calculated as,
td=√(2s/g)
td=√(2×54832.5)/(9.8)
td=105.8 s
Substituting the values in equation 2,
t=121.8+105.8
t=227.6 s
Thus, the duration of rocket in the air was 227.6 s
(c)
Figure
From the figure,
At point A, fuel was out.
At point B, rocket attended maximum altitude.
At point C, rocket fell on ground.
Acceleration is the rate of change of an object's velocity with respect to time. Acceleration is a vector quantity (as long as it has magnitude and direction). The direction of an object's acceleration is given by the direction of the net force acting on that object. As described in Newton's second law the magnitude of an object's acceleration is the combined effect of two sources.
The mass of this object is inversely proportional to the mass of the object, depending on the material from which it is made.
The SI unit of acceleration is meters per second squared.
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what is the relationship between waves characteristics and the generation of electrical energy?
The relationship between wave characteristics and the generation of electrical energy is that energy of the wave is converted into electrical energy and the energy carried by this wave depends on its amplitude.
What is the average power of a wave?The average power of a wave is the amount of energy of the wave transmitted over a given time.
Power = energy / time
The amount of energy carried by a wave is related to the amplitude of the wave.
A high energy wave is characterized by a high amplitude; a low energy wave is characterized by a low amplitude.
Mathematically, the formula for the average power of a wave is given as;
P(avg) = ¹/₂μω²A²v
where;
μ is the mass per unit length of the waveω is the angular speed of the waveA is the amplitude of the wavev is the speed of the waveThus, the energy carried by a wave is a function of its amplitude and speed.
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neutron stars are extremely dense objects formed from the remnants of supernova explosions. many rotate very rapidly. suppose the mass of a certain spherical neutron star is twice the mass of the sun and its radius is 5.0 km. determine the greatest possible angular speed it can have so that the matter at the surface of the star on its equator is just held in orbit by the gravitational force.
The greatest possible angular speed an object can have is 46072.3431 rad/s.
What exactly does gravity mean?Any two objects with mass are drawn together by the gravitational force. The gravitational force is known as. According to F=Gm₁m₂/r², the direction of force will always point in the direction of the opposing mass along the line connecting the two bodies. It is an alluring natural force.
The gravitational force will balance the centripetal force,
GmM/R² = mRω²
ω = √GM/R³
ω = √6.67 × 10⁻¹¹ × 2 × 1.989×10³⁰/5000³
ω = √2.653×10²⁰/5000³
ω = √2.653×10²⁰/1.25×10¹¹
ω = √2.122×10³¹
ω = 46072.3431 rad/s.
The greatest possible angular speed an object can have is 46072.3431 rad/s.
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in part 5.2.3 of the experiment, you will measure the index of refraction of yellow light using lab manual equation 5.2. suppose the minimum angle of deviation is 29 degrees. what is the index of refraction?
The above statement states that when the minimal angle of departure is 29 degrees, then index of refraction is 1.26.
What is refraction explain to kids?Refraction occurs when light bends or changes direction as it passes through one material and then another. For instance, when light strikes water after passing through the air, it refracts. As a result, the straw in a water glass may appear bent at the water's surface. Some surfaces don't refract or reflect light at all.
Briefing:D=29°
As for the refractive index:
μ=2sin(30°+D/2)
=2sin(30°+29°/2)
=2sin(30°+14.5°)
=2sin(44.5°)
=2*0.63
= 1.26
Therefore the refractive index is 1.26.
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a ? is an electric device that uses electromagnetism to change voltage from one level to another or to isolate one voltage from another.
An electrical device known as a transformer transfers energy between one electric circuit to another by employing the electromagnetic induction principle.
How does the phenomenon of electromagnetism work?The coils of wire that make up an electromagnet have electricity running through them. When an electric current flows through the wire coils of an electromagnet, the coils act like a magnet because moving charges produce magnetic fields.
For instance, what is electromagnetism?Microwaves, X-rays, gamma rays, radio and television waves, ultraviolet rays, reflected light, ultraviolet light, and microwaves are a few samples of electromagnetic waves that propagate across space independently of matter.
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a disk is suspended by a nail such that it pivots in a vertical plane about a point on the edge of the disk. if the disk's radius is 25 cm, what is the period of oscillation?
1.2s is the period of oscillation of a disk is suspended by a nail such that it pivots in a vertical plane about a point on the edge of the disk when the disk's radius is given 25 cm.
What do you mean by oscillation?The process in which any quantity or measure fluctuating repeatedly about its equilibrium value in time is what is termed as oscillation. The periodic change in a substance's measured value between two values or around its equilibrium value is another way to define oscillation. Period :The period, what is known as the length of each full oscillation, is constant. T = 2 Square root of L/g, where L is the pendulum's length and g is the acceleration brought on by gravity, is the formula for a pendulum's period.
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