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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Jupiter has enough mass to make 318 Earths. In contrast, Uranus and Neptune have only enough mass to makeSelect one:a.100 Earthsb.70 Earthsc.15 Earthsd.2 Earths
Jupiter has enough mass to make 318 Earths. In contrast, Uranus and Neptune have only enough mass to make beacause Since Galileo Galilei discovered the first moons outside of Earth in 1610, Jupiter has a long history of shocking astronomers. That finding altered our perspective of the universe.
The Ten Most Recent Jupiter Resources: Dust in the Wind (on Mars and Well Beyond)
Jupiter, the fifth planet from the Sun, is by far the largest planet in the solar system, with a mass that is more than twice that of all the other planets put together.
The well-known stripes and swirls of Jupiter are actually ammonia and water clouds floating in a hydrogen and helium atmosphere. These clouds are frigid and windy. The famous Great Red Spot on Jupiter is a gigantic storm that has been raging for hundreds of years and is larger than Earth.
Currently, one spacecraft, NASA's Juno orbiter, is investigating this.
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the firing lines on an oscilloscope pattern are all abnormally low. technician a says that the problem is probably low coil output. technician b says that the problem could be an overly rich air-fuel mixture. who is correct?
Technician a says that the problem is probably low coil output. This is correct
What is meant by oscilloscope ?A laboratory tool called an oscilloscope is frequently used to show and examine the waveform of electronic signals. The instrument essentially plots a graph of the immediate signal voltage against time.
Oscilloscopes (or scopes) analyse and show voltage signals as waveforms, which are pictures of how voltage changes over time. Signal changes are depicted on a graph by the signals, which is plotted. The horizontal (X) axis represents time, while the vertical (Y) axis shows voltage measurement.
Four different types of digital oscilloscopes can be identified: digital oscilloscopes for storage (DSO) oscilloscopes with digital phosphors oscilloscopes for mixed signals oscilloscopes with digital sampling.
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the cornea, a boundary between the air and the aqueous humor, has a 3.0 cm focal length when acting alone. part a what is its radius of curvature
If the cornea, which serves as a border between the aqueous humor and the air, has a focal length of 3.0 cm, its radii is equal to 0.76 cm.
What in physics is the radius of curvature?The radius of curvature of both the spherical mirror is the diameter of the hollow sphere that contains the object that serves as the mirror. The radius of curvature of a spherical mirror is, in other language, the distance between its pole and center of curvature.
Is the curvature radius unit?Let's calculate the distance in meters (m) and the time in minutes (sec). Then, the units for torsion and curvature are both m1. Explanation #1, which is short and nasty but at least accounts for curvature: As you are likely aware, the radius of a circle has a curvature of 1/r.
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a typical pair of off-the-shelf reading glasses has 2.0 d lenses. what is the focal length of these lenses?
The focal length of these lenses is 50cm.
Solution:
Write the expression for the relationship between the power (P) and focal length (f) of a lens.
P = 1/F
From the above expression, the focal length of the given lenses can be determined as follows.
P = 1/F
F = 1/P
= 1/2.0D
= 5D⁻¹ (1M/1D⁻¹ )
= 0.5 M
= 50cm
The focal length of a lens is determined when the lens is focused to infinity. The focal length of a lens indicates its angle of view and magnification. The longer the focal length the narrower the angle of view and the higher the magnification.
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what has happened to the number of barred spirals, compared to the total number of spirals, over time as the universe has aged?
The proportions of barred spirals relative to unbarred spirals likely have changed throughout the history of the universe, with only about 10% containing rods about 8 billion years ago, to about a quarter of 2.5 billion years ago.
Barred spiral galaxies account for approximately 18% of all the galaxies that have been discovered. Examples are NGC 1365 in the constellation Fornax and NGC 1300.
About Barred Spiral GalaxyA barred spiral galaxy is a spiral galaxy with a central bar-shaped structure consisting of a star at its center. This rod can be found from half of all spiral galaxies. Bars generally affect the movement of stars and interstellar gas within spiral galaxies and can also affect spiral arms. The Milky Way galaxy, in which the solar system is located, is classified as a barred spiral galaxy.
Edwin Hubble classifies this type of spiral galaxy as "SB" (spiral, barred) in the Hubble classification and arranges them into sub-categories or sub-groups based on how open the spiral arms are.
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what force must be exerted on the trunk in problem 36 so that it would slide down tht eplane with a constant velocity? in which direction should the force be exerted?
In issue 36, kinetic friction force must be applied to the trunk such that it slides down the plane at a constant pace.
What is the mechanism of force?Force is defined in physics as: the push or pull on an object with mass that causes it to change velocity. Force is an external agent that can change the condition of rest or motion of a body. It has a magnitude as well as a direction. A force is a push or pull on an object caused by its interaction with another thing. When two objects interact, a force is exerted on each of the items. When the interaction ends, the force is no longer felt by the two objects. A force can cause a mass object to change its velocity (e.g., moving from rest), i.e., to accelerate. Intuitively, force can be described as a push or a pull.
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light of wavelength 640 nm is shone on a double-slit apparatus and the interference pattern is observed on a screen. when one of the slits is covered with a very thin sheet of plastic of index of refraction n
light of wavelength 640 nm is shone on a double-slit apparatus and the interference pattern is observed.minimum thickness off plate so that screen becomes dark at centre is 533nm.
what is interfernece pattern?Under these conditions, the points of constructive and destructive interference form a complex pattern, which we will refer to as an interference pattern. To begin the discussion, consider two sources of sound that give off waves in all directions. One source and wave is colored red, while the other is green
Interference Meaning. There are 5 meaning (s) for word Interference. Interference Meaning 1 : the act of hindering or obstructing or impeding. Synonyms : hinderance, hindrance. Interference Meaning 2 : electrical or acoustic activity that can disturb communication. Synonyms : disturbance, noise. Interference Meaning 3 : a policy of intervening ...
The geometrical path length from each slit to the center of the diffraction pattern is the same. Let the thickness of the plastic sheet be x. The optical path length through the plastic sheet is nx and the optical path length difference is therefore (n - 1)x. We need (n - 1)x = λ/2, for the minimum thickness n.
Alternatively:
Reaching the slits, the waves passing the slits are in phase. Upon exiting the slits they have a phase difference (k' - k)x = (2πn/λ - 2π/λ)x = (2π/λ)(n - 1)x.
For the minimum thickness we need (2π/λ)(n - 1)x = π, x = λ/(2(n-1)) = λ/1.2 = 533 nm. The minimum thickness is 533 nm.
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a low speed jeweler's grinder turns at 390 rpm. calculate the frequency in rps. for this and the next two questions, give only a numerical answer--no units.
The frequency in 6.5 rps.
The frequency of a repeated event is its number of instances per unit of time. In some cases, it is also referred to as temporal frequency or ordinary frequency to underline differences with spatial and angular frequencies, respectively. One (event) per second is equal to one hertz (Hz), which is how frequency is stated. The period is the reciprocal of the frequency since it is the length of time for one cycle in a repeating occurrence.
We are given that ,
The grinder turns = 390rpm (revolution per minutes)
Therefore, to calculate the frequency in revolution per second i.e. the given value can be divided by 60.
Because, 1min = 60 sec
390rpm = 390/60rps
390rpm = 6.5rps
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In the laboratory, the temperature is 295 k and the total pressure in the gas-collecting tube is 748. 6 mmhg. If the vapor pressure of water at 295 k is 19. 8 mmhg, determine the pressure of the h2(g) in the gas-collecting tube.
According to Dalton's law, the total pressure of a mixture of unreacted gases is equal to the sum of the partial pressures of the individual gases.
The pressure of H₂ gas collected in the tube will be 728.8 mm Hg
This can be calculated by:
Dalton's formula:
[tex]P_Total[/tex] = [tex]p_{H2O} + p_{H2}[/tex]
Given :
Total pressure of gases = 748.6 mm Hg
Partial pressure of water = 19.8 mm Hg
Partial pressure of Hydrogen = ?
Now using the formula we will calculate:
748.6 = 19.8 + p[tex]H_{2}[/tex]
728.8 = p[tex]H_{2}[/tex]
Therefore, The pressure of H₂ gas collected in the tube will be 728.8 mm Hg.
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23. A runner running with a constant speed travels 100m in 25sec. How long does it take to travel 400m?
it 100 seconds
mark me brain
thank you
9. how does the charge of one electron compare with the charge of another electron? how does it compare with the charge of a proton?
The charge of every electron is the same. Therefore, if we were to compare two electrons, their charges would be the same. Proton charge and electron charge are complementary and equal.
How does it compare to a proton's charge?The electron has a negative charge, but the proton itself has a positive charge. Both have an identical electric charge but a different sign.
What impact does one charge have on subsequent charges?Unlike charges attract one another while like charges repel one another. Both two positive and two negative charges repel one another as a result. Positive and negative charges are drawn to one another.
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A bullet with a mass of 12 g moving horizontally strikes a fixed block of wood and
penetrates a distance of 5.2 cm. The speed of the bullet just before the collision is 640
m/s. The average force that the wood exerted on the bullet was
A) 4.7 × 104N
The average force that the wood exerted on the bullet was 47261.5 N
What is the formula of [tex]V^2[/tex] ?The third equation of motion is v2 = u2 + 2as. We are already aware that distance is equal to average velocity times time. Either v2 = u2 + 2as or 2as = v2 - u2. The third equation of motion connects the particle's ultimate velocity (v), initial velocity (u), constant speed (a), and displacement (S).deceleration of the bullet by using the third equation of motion:
[tex]v^2 = u^2 + 2as[/tex].
where,
a = deceleration = ?
s = distace covered = 5.2 cm = 0.052 m
v = final speed = 0 m/s
u = initial speed = 640 m/s
Therefore,
[tex]2as = v^2- u^2[/tex]
[tex]a=\frac{0 - 640^2}{2\times0.052}[/tex]
a = - [tex]\frac{409600}{0.104}[/tex]
= - 3938461.5 m/s^2
for the force, use Newton's Second Law of Motion:
F = ma
[tex]F = 0.012 kg\ \times\ 3938461.5 m/s^2[/tex]
F= 47261.5 N
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in the deep space between galaxies, the density of atoms is as low as 106 atoms/m3, and the temperature is a frigid 3.1 k. what is the pressure?
The temperature is a chilly 3.1 k, and there are only 106 atoms per cubic meter of air in the deep vacuum between galaxies. 3.86*10⁻¹⁷ pa is the pressure.
Density of atoms,[tex]\rho= 10^6 atoms/m^3[/tex]
Temperature, T= 2.8K
using Ideal Gas Equation,
PV= nRT
where n= number of moles,
R= Universal Gas Constant
P= Pressure
Number of atoms in 1 mole, [tex]N_A= 6.022 \times 10^{23}[/tex]
Then given number of atoms will have following number of moles, [tex]n= \frac{10^6}{N_A}[/tex]
where NA= Avogadro's number which is constant
Or we can write,
[tex]\frac{n}{V}= \frac{\rho}{N_A}[/tex]
Thus Pressure will be
[tex]P= \frac{nRT}{V}= \frac{\rho RT}{N_A}[/tex]
using given and known values in above,
[tex]P= \frac{10^6 \times 8.314 \times 2.8}{6.022 \times 10^{23}}= 3.86 \times10^{-17} Pa[/tex]
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in some countries, automobile fuel efficiency is measured in liters per 100 km while other countries use miles per gallon. suppose that 1 kilometer equals miles, and 1 gallon equals l liters. which of the following gives the fuel efficiency in liters per 100 kilometers for a car that gets x miles per gallon
A car's capacity for gas is influenced by its size. Gas tanks for smaller cars typically hold 12 gallons, but those for larger cars can carry 15 or 16 gallons.
What is gallons?The legal definition of a US liquid gallon, commonly referred to as "gallon," is 231 cubic inches, or precisely 3.785411784 litres. At 3.98 °C (39.16 °F), a US liquid gallon can hold around 3.785 kilograms or 8.34 pounds of water, which is roughly 16.7% less than an imperial gallon.
4 quarts, 8 pints, or 128 fluid ounces make up a gallon.
One liter of liquefied petroleum gas weighs 0.500 kg. 2 Litres can hold 1 Kilogram. - Liquefied Natural Gas: 0.592 kg are contained in 1 litre. 1.689 litres are contained in 1 kilogram.
Calculation of gasoline cost per km: Fuel cost per km equals fuel cost per liter, kilogram, mile, or amount of fuel consumed.
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which lists the jovian planets in order of increasing distance from the sun? (a) jupiter, saturn, uranus, pluto (b) saturn, jupiter, uranus, neptune (c) jupiter, saturn, uranus, neptune
Jovian planets in order of increasing distance from the sun are jupiter, saturn, uranus, neptune. (C)
What are the Jovian PlanetsBased on the size and composition of the constituents, planets are grouped into terrestrial planets and Jovian planets. The Jovian planet is a planet that has a very large size and its constituent composition is the same as the Planet Jupiter.
The planets included in the Jovian planets are Jupiter, Saturn, Uranus and Neptune.
Planet Jupiter is the largest planet in the solar system. The diameter of this planet is 13,000 km with an average distance to the Sun of 778.3 million km.Planet Saturn is a Jovian planet that is easily distinguished from other planets. The reason, Saturn has a ring that is characteristic. Saturn's rings are chunks of meteorite ice with 402,000 km and about 15 km thick.Planet Uranus is a planet that was discovered by William Herschel in 1781. This planet is shrouded by a thick fog which mainly consists of methane gas. Uranus can reflect sunlight so well that it can easily appear blue.Planet Neptune has a shape similar to the Moon because there is a thin layer of silicate on its surface. The composition of the planet Neptune is iron and other heavy elements. The planet Neptune has 8 satellites, including Triton, Nereid, Larissa and Proteus.Learn more about the jovian planets at : https://brainly.com/question/17009173
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what is the focal length of a magnifying glass that produces a magnification of 3.00 when held 5.00 cm from an object, such as a rare coin?
The focal length is calculated as follows: five centimetres of object distance times a three-magnification factor divided by three less one results in a focal length of 7.50 centimetres.
Why is it referred to as focal length?The focal length of a thin lens in air is the separation between its major foci, also known as focal points, and its centre. The focal length is the distance at which a beam of collimated light will be concentrated to a single spot for a converging lens (for instance, a convex lens).
What is the focal ratio?The focal ratio, which has no units, is calculated by dividing the telescope's focal length by its aperture.
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Two small objects of mass m0 and a rotating platform of radius R and rotational inertia Ip about its center compose a single system. Students use the system to conduct two experiments. The objects are assumed to be point masses.
Each object of mass m0 is placed a distance r1 away from the center of the platform such that both masses are on opposite sides of the platform. A constant tangential force F0 is applied to the edge of the platform for a time Δt0, as shown in Figure 1. The system is initially at rest.
Each object of mass m0 is placed a distance r2 away from the center of the platform such that both masses are on opposite sides of the platform. Distance r2
Which of the following graphs represents the angular displacement of the system as a function of time for the system in experiment 1?
Two small objects of mass m0 and a rotating platform of radius R and rotational inertia Ip about its center compose a single system. Graphs represents the angular displacement of the system as a function of time for the system in experiment 1 is parabola with mouth open up.
what is angular displacement?Angular displacement is a vector quantity, which means that angular displacement has a size and a direction associated with it. The direction is important for later mathematical processes, but the definition is a bit confusing.
It is the angle made by a body while moving in a circular path. Before we go any further into the topic, we have to understand what is meant by rotational motion. When a rigid body is rotating about its own axis, the motion ceases to become a particle. It is so because in a circular path velocity and acceleration can change at any time. The rotation of rigid bodies or bodies which will remain constant throughout the duration of rotation, over a fixed axis is called rotational motion.
The angle made by the body from its point of rest at any point in the rotational motion is the angular displacement.
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Two two key problems for controlled fusion on earth are _______ and containment.
Two key problems for controlled fusion on Earth are high temperature and containment.
What is nuclear fusion?Nuclear fusion can be defined as a type of nuclear reaction that involves joining or combining two (2) smaller (light) nuclei of atoms, so as to form a single heavier nucleus accompanied with the release of energy.
What is controlled fusion?In Science, controlled fusion can be defined as a thermonuclear process that typically involves the fusion of smaller (light) atomic nuclei into a single heavier nucleus, usually at high temperatures and under controlled conditions.
In this context, we can reasonably infer and logically deduce that high temperatures (heating) and containment are the two fundamental problems that are associated with controlled fusion on planet Earth.
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Complete Question:
Two key problems for controlled fusion on Earth are _______ and containment.
how could a vegetarian invoke the second law of thermodynamics to argue that they might be living more sustainably than someone who eats meat?
Answer:
HEAR WE CAN SAY THAT VEGITERIAN INVOKE THE SECOND LOW OF THERMODYNAMICS
Explanation:
According to the second law, entropy always rises in closed systems. Let's use the growing of a leaf as an example. The sun emits low-entropy radiation that the leaf absorbs and then emits higher-entropy radiation into its surroundings. The leaf is encouraged to reduce its own entropy in order to sustain the overall process's required increase in entropy as a result of this significant entropy increase. Using this illustration, we can draw the conclusion that living things adhere to the second law of thermodynamics.
second law of thermodynamics
A process that exchanges or transfers heat can result in a certain amount of useful work, according to the second law of thermodynamics.
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You are riding on a Ferris wheel that is rotating with a constant speed. The car in which you riding always maintain its correct upwards orientation; it does not invert.
a. What is the direction of the normal force on you from the seat when you are at the top of the wheel?
i. upward, ii. downward, iii. impossible to determine
b. From the same choices, what is the direction of the net force on you when are at the top of the wheel?
You are riding on a Ferris wheel that is rotating with a constant speed.
a. The direction of the normal force on you from the seat when you are at the top of the wheel is upwards.
b. The direction of the net force on you when you are at the top of the wheel is neither upwards nor downwards as the value of it is zero.
When we draw a free-body diagram of a ferris wheel, we have normal force directed upwards and m(g - a) directed downwards. This is because we have gravitational force and acceleration of the wheel in the opposite direction to each other.
The net force on the wheel is zero so that we do not either fly upwards or fall down. This helps us to maintain balance on the Ferris wheel.
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a beach slopes at 7.3 centimeters per meter. waves are breaking in a surf zone that is 27 m offshore, and the wavelength is 9.7 meters. how far offshore will wave base encounter the bottom? what is the wave height of the breakers?
(a) Work Base= Δλ/2 = 9.6/2= 4.8 m
Since slope is given by,
m= Δy/Δx
Δx= Δy/m = 4.8/(0.073) = 65.753 m
Δx = 6.575 × 10 m
(b) Δx' = 25 cm
Δy' = 0.073×25 = 1.825m
The wave height is =
h = Δy'/1.33 = 1.825/1.33 = 1.372 m
∴ wave height = h = 1.372 m
What is wave height?
In fluid mechanics, the wave height of a surface wave is the height difference between a wave crest and an adjacent wave trough. Wave height is a term used by mariners and in coastal, marine and marine engineering.
At sea, the term significant wave height is used to introduce a well-defined, standardized statistic, the characteristic height of random waves in sea conditions, including wind and sea conditions. indicates It is defined to roughly correspond to what seafarers observe when visually estimating mean wave height.
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Which of the following quantities point in the same direction as the change in linear momentum of an object? Net force Acceleration Impulse Momentum Change in position Change in velocity Mass Time interval
The subsequent portions factor withinside the equal route because the alternate in linear momentum of an object is impulse.
Momentum is mass in motion, and any transferring item will have momentum. An item's alternate in momentum is same to its impulse. Impulse is a amount of pressure instances the time interval. Impulse isn't always same to momentum itself; rather, it is the growth or lower of an item's momentum. Impulse is a vector amount that has the equal route because the pressure.
Momentum and impulse have the equal units: kg·m/s.The impulse skilled with the aid of using the item equals the alternate in momentum of the item. In equation form, F • t = m • Δ v. In a collision, gadgets revel in an impulse; the impulse reasons and is same to the alternate in momentum.
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in fig. 10-42, a cylinder having a mass of 2.0 kg can rotate about its central axis through point 0. forces are applied as shown: f1 i 6.0 n, f; i 4.0 n, f3 i 2.0 n, and f4 i 5.0 n. also, r i 5.0 cm and r i 12 cm. find the (a) magnitude and (b) direction of the an gular acceleration of the cylinder. (during the rotation, the forces maintain their same angles relative to the cylinder.)
The magnitude of the angular acceleration of the cylinder is 9.7 rad / s² and its direction is counter clockwise
τ = R F1 - R F2 - r F3
τ = 12 * 10⁻² ( 6 - 4 ) - 5 * 10⁻² ( 2 )
τ = 24 * 10⁻² - 10 * 10⁻²
τ = 14 * 10⁻² N m
I = M R² / 2
I = 2 * 0.12² / 2
I = 144 * 10⁻⁴ kg m²
α = τ / I
α = Angular acceleration
τ = Torque
I = Moment of inertia
α = 14 * 10⁻² / 144 * 10⁻⁴
α = 9.7 rad / s²
Since α is positive, the direction is counter clockwise
Therefore, the magnitude and direction of the angular acceleration of the cylinder are 9.7 rad / s² counter clockwise
The given question is incomplete. The complete question is:
In Fig. 10-42 attached below, a cylinder having a mass of 2.0 kg can rotate about its central axis through point O. Forces are applied as shown : F1 = 6.0 N, F2 = 4.0 N, F3 = 2.0 N, and F4 = 5.0 N. Also, r=5.0 cm and R=12 cm. Find the (a) magnitude and (b) direction of the angular acceleration of the cylinder. (During the rotation, the forces maintain their same angles relative to the cylinder)
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A rocket rises at 5 ft/s between 0 and 10 seconds. Afterwards it rises at 15 ft/s for another 15 seconds. Use one loop to calculate the rockets height at the end of the 25 seconds. Use h as the variable for height.
The height of the rocket at the end of 25 sec is 275 ft.
Let us determine the height attained in first 10 seconds.
Given that, velocity = 5 ft/s
Time = 10 sec
Height =?
We know, height = velocity × time = 5 × 10 = 50 ft
Let us determine the height attained in the next 15 seconds.
Given that, velocity = 15 ft/s
Time = 15 sec
Height =?
Height = 15 × 15 = 225 ft
Now, let us determine the height of the rocket at the end of 25 sec.
Height in first 10 sec = 50 ft
Height in next 15 sec = 225 ft
Height at the end = 50 ft + 225 ft = 275 ft
Thus, the height of the rocket is 275 ft.
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a turntable was revolving at 33 1/3 rpm. it was shut off and uniformly slowed down and stopped in 5.5 seconds.a) what was the angular acceleration?b) through how many revolutions did it turn?
In the case of a turntable rotating at 33 1/3 rpm, the angular acceleration is -0.63 rad/s2. In 5.5 seconds, it was turned off, slowed down consistently,
What is angular acceleration, and how does it appear on a graph?The rate at which the angular velocity changes over time is known as the angular acceleration, which is typically denoted by the symbol and stated in degrees per second more for each second. In the case of a constant (nonvarying) angular velocity, t = t and 0 = 0.
Describe the angular acceleration formula.The amount by which angular velocity changes is known as angular acceleration. Angular acceleration can be stated mathematically as follows: =t = t, where is the change in angular velocity and t is the change in time.
The information provided in the issue is;
n is the old Ip =33.3 rpm's rpm.
t is the time taken to stop, which is 5.5 seconds
The following formula yields the angular speed:
[tex]w = \frac{2\pi N}{60} \\w = 3.45 rad/sec[/tex]
The term "angular acceleration" refers to the rate at which angular velocity changes;
[tex]\alpha = \frac{w_{f} - w_{i} }{t} \\\alpha = -0.63 rad/sec^2\\\\The equation for the newtons law is given as\\\\[/tex]
∅(t) =
[tex]w_{0} +\frac{1}{2}\alpha t^{2} \\= 3.45 +\frac{1}{2} X (-0.63)(5.5)^2\\ = 9.45 rad[/tex]
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You and a friend have just loaded a 200 kg crate filled with priceless art objects into the back of a 2000 kg truck. As you press down on the accelerator, force Fsurface on truck propels the truck forward. To keep things simple, call this FT. What is the maximum magnitude FT can have without the crate sliding? The static and kinetic coefficients of friction between the crate and the bed of the truck are 0.80 and 0.30. Rolling friction is negligible. Draw free-body diagrams for the crate and the truck separately.
17248 Newton force is the maximum magnitude FT can have without the crate sliding.
Fs=0.8
F=fs×mg
F=0.8×2200×9.8
F=17248 N
A force is a push or pull that an object feels as a result of interacting with another thing. Each time two things come into contact, a force is applied to each one of them. After the encounter is finished, the force is no longer felt by the two objects. Forces are merely interactions; they do not exist in isolation.
When two objects interact and appear to be in physical contact with one another, contact forces are created. Several types of contact forces include frictional forces, tensional forces, normal forces, air resistance forces, and applied forces. Even though two interacting objects are not in close proximity to one another, action-at-a-distance forces nevertheless exist.
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several thin films are stacked together in each butterfly wing scale. how would these multiple layers of thin films affect the light reflected by the butterfly's wings?
More 400-nm light would be reflected, because some of the light transmitted through the first layer could be reflected by the second layer, light transmitted by the second layer could be reflected by the third, etc. is the correct answer. The correct option is option (2).
In the case of multiple thin films stacked together in a butterfly's wing scale, interference effects play a crucial role in determining the light that is reflected. As light passes through each thin film layer, some of it is transmitted through the film, and some is reflected. The transmitted light then interacts with the subsequent layers and can be further reflected or transmitted.
The multiple layers of thin films create a complex interference pattern where the reflected light waves from each layer either reinforce or cancel out each other. This interference pattern depends on the thickness and refractive indices of the films.
For certain wavelengths of light, constructive interference occurs, causing those wavelengths to be enhanced and reflected more strongly.
Therefore, more 400-nm light (or other specific colors) would be reflected due to the constructive interference of light waves from the multiple layers of thin films in the butterfly's wings. This phenomenon is responsible for the vibrant and iridescent colors seen in butterfly wings. The correct option is option (2).
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The complete question is:
Several thin films are stacked together in each butterfly wing scale. How would these multiple layers of thin films affect the light reflected by the butterfly's wings?
1) There would be no change, because all of the 400−nm light would be reflected by the first scale, and so the light is unaffected by the remaining scales.
2) More 400-nm light would be reflected, because some of the light transmitted through the first layer could be reflected by the second layer, light transmitted by the second layer could be reflected by the third, etc.
3) Less 400−nm light would be reflected because light reflected from the second layer can interfere destructively with light reflected by the first layer.
4) There would be no change because the interference effects would all occur at the first layer.
5) More 400-nm light would be reflected because the effective gap would be three times as wide.
6) Less 400−nm light would be reflected because the effective gap would be three times as wide.
If you stand near a campfire and you feel the heat without touching it, what type of thermal energy transfer is occurring?.
If you stand near a campfire and you feel the heat without touching it, Radiation transfer is occurring
What is Radiation ?One of the three methods for transferring thermal energy is thermal radiation. The other two methods require matter to transfer energy, these are conduction and convection, respectively. The only thermal energy transfer method that is independent of matter is radiation.
Electromagnetic waves make up thermal radiation, the majority of which are visible and infrared. This is given off by an object as a result of its temperature. When this radiation strikes and absorbs energy from another object, it transforms that energy into heat.
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a 7.0 kg bowling ball moves at 2.10 m/s. how fast must a 2.40 g ping-pong ball move so that the two balls have the same kinetic energy?
The final velocity v=0.06125m/s with respect to initial and final conditions.
Given -
Mass =7kg =0.07g
speed = 2.10m/s
New mass= 2.40g
Physics concept -To find New speed consider the following concept:- As per law of conservation of Momentum , Initial momentum equals to final momentum. Momentum refers to the outcome of force application with its output velocity. Application - In sports, the word "momentum" is frequently used. A team that has momentum is moving and will require some work to stop. A team with a lot of momentum is really moving and will be challenging to stop. A physics term, momentum describes the amount of motion that an object has. Sports teams that are progressing have momentum. An object has momentum if it is moving (in motion).Mathematical concept-[tex]P=mV\\\\mV=Mv[/tex]
calculations-0.07 x 2.10 = 2.40 v
v= (0.07 x 2.10)/2.40
v=0.06125m/s
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how did tycho brahe modify ptolemy's earth-centered model in order account for the observations of galileo
Tycho Brahe modified Ptolemy's earth-centred model with made the Earth travel around the Sun in order to account for the observations of Galileo.
What are the observations of Tycho Brahe?Gаlileo mаde а number of observаtions thаt finаlly helped convince people thаt the Sun-centered solаr system model (the heliocentric model), аs proposed by Copernicus, wаs correct. These аrguments cаn be divided into two kinds: Those thаt proved thаt the Ptolemаic model wаs incorrect; аnd those thаt undermined the broаder philosophy of Аristoteliаnism thаt included the Ptolemаic model.
Tycho Brahe, with his new meаsuring devices, wаs аble to record the position of the plаnets with the best possible аccurаcy for nаked eye observаtions, ten times more аccurаtely thаn people hаd been getting until then. Even with his high quаlity observаtions, Brаhe wаs not аble to detect аny chаnges in the positions of the stаrs over the yeаr, which should occur if the Eаrth revolves аround the Sun.
Your question is incomplete, but most probably your full options were
a. Tycho mаde the Eаrth trаvel аround the Sun.
b. Tycho mаde Venus move аroun the Eаrth.
c. Tycho threw out the geocentric model entirely.
d. Tycho mаde Mercury trаvel аround the Sun.
Thus, the correct option is A.
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