Answer:
a) 384, 1153 and 1819.9 Hz, b) L = 0.44 m
Explanation:
In a one-tube system open at one end and closed at the other =, at the open end you have an antinode (belly) and at the closed end a node, so the fundamental resonance is
fundamental λ = 4L
3rd harmonic λ = 4L / 3
5th harmonic λ = 4L / 5
general term λ = 4L / n n = 1, 3, 5,…
a) the frequencies for which the pipe resonates are
fundamental λ = 4 0.22 = 0.88m
with the resonance frequency we can find the speed of sound in the air
v = λ f
v = 0.88 384
v = 337.9 m / s
this is the speed that we will use in all the rest of the problem
for the 3rd harmonic
λ = 4 0.22 / 3 = 0.293 m
f = 337.9 / 0.293
f = 1153.3 Hz
for the 5th harmonic
λ = 4 0.22 / 5 = 0.176 m
f = 337.9 / 0.176
f = 1919.9 Hz
b) In the case of the two open ends there are bellies in both, for which
fundamental λ = 2L
2 harmonic λ = 2L / 2 = L
3 harmonic λ = 2L / 3
General term λ = 2L / n n = 1, 2, 3,…
let's find the wavelength for the resonance
v = λ f
λ = v / f
λ = 337.9 / 384
λ = 0.8799 m
let's find the tube length for this resonance
λ = 2L
L = λ / 2
L = 0.8799 / 2
L = 0.44 m
therefore for the same resonance the tube must be twice as long
c) If the air is exchanged for helium we look for the length of the tube to find how long the resonance of 384 Hz is, so if the system is open at one end and closed at the other
v = (4L) f
v = 4 L 384
where L is measured
A ship sends out a 1200 Hz sound wave, which has a wavelength of 1.2 m in the water. It reflects off the ocean floor and returns to the ship in a total time of 5 seconds. How deep is the ocean at this location?
speed =frequency ×wavelength
1200×1.2=1440m/s
s=2d/t
1440=2d/5
2d=7200
d=3600m
The distance of the ocean at this location should be considered as the 3600 m.
Calculation of the distance:Since we know that
speed =frequency ×wavelength
So,
1200×1.2=1440m/s
Also we can say that
s=2d/t
So,
1440=2d/5
2d=7200
d=3600m
hence, The distance of the ocean at this location should be considered as the 3600 m.
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Rachel is wearing roller skates and is standing next to a wall. She pushes off from the wall and then glides to a stop. Plan an X in the lines next to all the statements that you think are true about Rachel’s motion.
__ The force from the wall is becoming less and less as Rachel glides on her skates.
__ Rachel’s motion energy is naturally going down and the energy is disappearing.
__ Rachel’s motion energy is being turned into other types of energy.
__ There is a force by the ground slowing Rachel down.
__ There is a force by the ground that keeps Rachel moving for a while before she stops.
Answer:
The correct option is;
Rachael's motion energy is being turned into other types pf energy
Explanation:
Here we have Rachael pushing off from the wall to generate motion energy. The motion energy makes Rachael glide such that she is displaced while at the same time she overcomes resistances to the motion, (rolling) of the tires from the ground as well as generates some audible noise and heat. These are all forms of energy that takes up the initial motion energy that Rachael had.
Final answer:
In Rachel's motion example, the key true statements are that her motion energy is being converted into other forms of energy and that friction from the ground is slowing her down. Energy conservation and friction are fundamental concepts in explaining her motion.
Explanation:
Rachel is wearing roller skates and is standing next to a wall. She pushes off from the wall and then glides to a stop. Let's examine which statements about Rachel's motion are true:
The force from the wall is becoming less and less as Rachel glides on her skates. False. The force from the wall is applied during the initial push and does not continue to act on Rachel as she glides.Rachel’s motion energy is naturally going down and the energy is disappearing. False. Energy does not disappear; it is converted into other forms according to the law of conservation of energy.Rachel’s motion energy is being turned into other types of energy. True. As Rachel glides and eventually stops, her kinetic energy is converted into other forms, such as heat due to friction.There is a force by the ground slowing Rachel down. True. This force is friction, which opposes the motion and contributes to Rachel's stop. There is a force by the ground that keeps Rachel moving for a while before she stops. False. The ground does not apply a force to keep Rachel moving. The motion observed is due to the initial force she applied by pushing off the wall and inertia.How do spectrographs help astronomers classify stars?
They determine the size of stars.
They evaluate the color of stars.
They measure the brightness of stars.
They analyze the composition of stars.
Spectrographs help astronomers classify stars by providing a 'fingerprint' of the star. This fingerprint allows astronomers to determine the composition, temperature and other factors of a star.
Explanation:Spectrographs are critical tools in astronomy because they allow astronomers to analyze and classify stars based on their spectra. When light from a star passes through a spectrograph, it is split into its component colors, creating a spectrum. This spectrum is like a fingerprint for the star because each element leaves a specific pattern of spectral lines in the star's light. In other words, by identifying these lines, astronomers can determine the composition of stars.
In addition to determining a star's composition, the spectrum can also give hints about a star's temperature, velocity relative to Earth, and even information about its size. So, while a spectrograph does not directly measure the size or brightness of stars, the data it provides enables astronomers to infer this information.
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The correct answer is option D. They analyze the composition of stars.
A spectrograph helps astronomers classify stars by analyzing their spectra to determine chemical composition, temperature, and atmospheric pressure. This information differentiates between various types of stars. Stellar spectra also yield data on a star's motion and rotation.A spectrograph helps astronomers classify stars by analyzing the composition of stars through their spectra. By measuring the spectrum of a star, astronomers can determine its chemical composition, temperature, and atmospheric pressure. This information is vital for distinguishing between different types of stars, such as giant stars with large radii and low atmospheric pressures compared to smaller stars with high atmospheric pressures.The differences in the spectra of stars are mainly due to their temperatures, which are categorized into spectral classes. Each element in a star emits or absorbs light at specific wavelengths, allowing astronomers to identify the elements present in the star. Additionally, stellar spectra provide data on a star's motion (radial velocity) and rotational speed through the Doppler effect.A wave with a frequency of 60.0 Hz travels through rubber with a wavelength of .90 m. What is the speed of this wave?
Answer:
Speed of wave 54 ms⁻¹.
Explanation:
Given data:
Frequency of wave = 60 Hz
Wavelength of wave = 0.90 m
Speed = ?
Solution:
Formula
speed = wavelength × frequency
Now we will put the values in formula.
v = f × λ
Hz = s⁻¹
v = 60 s⁻¹ × 0.90 m
v = 54 m s⁻¹
A wave with a frequency of 60 Hz and a wavelength of 0.90 m through rubber travels at a speed of 54 m/s.
Explanation:The speed of a wave can be calculated by the formula: Speed = Frequency * Wavelength. Given that the frequency is 60.0 Hz and the wavelength is 0.90 m, we can substitute these values into the formula. Therefore, the speed of the wave is 60.0 Hz * 0.90 m = 54 m/s. This means that a wave with a frequency of 60 Hz and a wavelength of 0.90 m travels through rubber at a speed of 54 m/s.
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A car travels a distance of 98 meters in 10 seconds. What is the average speed of the car?
A. 4.9 m/s C. 9.8 m/s
B. 49 m/s D. 98 m/s
Answer:
C
Explanation:
So,the right answer is of option C.
look at the attached picture
Hope it will be helpful to you
What will a reflected light wave do?
Answer:
Reflection of Light. When light waves are incident on a smooth, flat surface, they reflect away from the surface at the same angle as they arrive. ... Regardless of whether light is acting as particles or waves, however, the result of reflection is the same.
Use the graph to answer the questions.
Based on the graph, what happens to current as
resistance increases?
This type of graph shows which type of relationship
between the two variables?
What would be a reasonable estimate for current at a
resistance of 50 12?
Answer:
- decreases
- inverse proportionality
- 1 A
Explanation:
Just take my word for it lol:)
Answer:
what the other guy said
Explanation:
its right trust me
What is the total mechanical energy of a 200 kg roller coaster moving with a velocity of 16 m/s at a height of 18 m above the ground?
Mechanical Energy = PE + KE
PE: mgh = 200 x 9.8 x 18 = 35280
PE: 35280 Joules
KE: 1/2mv^2 = 1/2 x 200 x 16^2 = 25600
KE: 25600 Joules
ME: 35280 + 25600
ME: 60,880J
An object is placed 19 cm in front of a concave spherical mirror of focal length 10 cm. What is the image distance?
21 cm
27 cm
6.8 cm
38 cm
The image distance for an object placed 19 cm in front of a concave mirror with a focal length of 10 cm is approximately 27 cm.
The image distance for an object placed 19 cm in front of a concave spherical mirror with a focal length of 10 cm can be determined using the mirror equation: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. Plugging in the given values of f = 10 cm and do = 19 cm into the equation gives 1/10 = 1/19 + 1/di. Solving for di yields an image distance of approximately 27 cm. Therefore, the correct answer is 27 cm.
Dalton’s completing an investigation in the science lab. He observes that a sample of liquid turns to gas at 135°C. What’s this temperature called?
Answer:
Boiling point
Explanation:
A liquid turns into a vapor at a certain temperature, known as the boiling point.
The boiling point is the temperature at which a liquid transforms into a gas. It is a fundamental concept in chemistry and is typically related to phase transitions and thermodynamics. In Dalton's experiment, the boiling point of the liquid under study was observed to be 135°C.
Explanation:The boiling point is the temperature at which a liquid transforms into a gas or vapor. In Dalton's investigation, the boiling point of the liquid he was studying was 135°C. This concept applies when substances are undergoing a phase transition from liquid to gas, which is a core principle of chemistry. During this process, the average kinetic energy of the molecules of the liquid increases, and more molecules have sufficient energy to escape from the liquid into the gas phase.
The observation of a substance changing states due to an increase in temperature, as Dalton has done in his experiment, is crucial to understanding the nature and properties of the substance. The transition of a substance from a liquid to a gas is also an important concept in thermodynamics, with applications in areas such as cooking and the semiconductor industry.
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If velocity is positive, which would most likely yield a negative acceleration?
A. A final velocity that is faster than an initial velocity.
B. A time that is less than a half hour.
C. An initial velocity that is faster than a final velocity.
D. A time that is greater than a half hour.
please answer quickly
Answer:
C my brodaz
Explanation:
The number of significant figures in 0.060900 is
Answer:
There are 5 significant figures.
Explanation:
You must start conting your sig figs until you continue to hit zeros at the end. Those zeroes at the end are disregarded. So 0.0609 is where you get your sig figs from.
A 240-volt, 2-amp motor is connected to a three-wire, 120/240-volt system. Connected between the black wire and neutral are four 200-watt, 120-volt lamps and a 120-volt, 1-amp motor. Between the red wire and neutral are three 200-watt, 120-volt lamps, one 1.67-amp motor and one 120-volt, 1-amp motor. (Round the FINAL answer to two decimal places.). How many amps flow in the red wire?
Answer:
(i)The current flow in black wire = 9.67 A (ii) The current low in the red wire is 9.68 A (iii) The current flow in neutral wire is 15.36 A (iv) when 240 volt were disconnected current in black wire is 7.68 A (v) when 240 volt were disconnected current in red wire is 7.68 A (vi) 15.36 A (vii) 6.34 (viii) 9.68 A (ix) 12.02 A
Explanation:
Solution
The current drawn by one amp is
I =P/V
I =200/120
I= 1.67 A
(i) The current flow in the black wire is
IBK = 4 * 1.67 A + 1A + 2A
IBK = 9.67 A
(ii) Current flow in the red wire is
IRD = 3 * 1.67 A + 1.67 A + 1A + 2A
= 8.68A + 1 A = 9.68 A
Note: Kindly find an attached copy of part of the solution to the given question above.
If Thomson’s atomic theory was accurate, what would the results of Rutherford’s gold foil experiment have been?
Answer:
If Thomson's atomic theory was accurate, the positively charged particles would have gone through the foil. The balanced positive charges and negative charges within the atom would have made the atom neutral, and the positive charges would not have been concentrated enough to cause deflection.
Explanation:
Answer:
THEY ARE CORRECT ^^^
Explanation:
In which direction is the magnetic force acting in the charge?
Answer:
"Right Hand
Right Hand Rule: Magnetic fields exert forces on moving charges. This force is one of the most basic known. The direction of the magnetic force on a moving charge is perpendicular to the plane formed by v and B and follows right hand rule–1 (RHR-1) "
Explanation:
Answer:
The direction of the magnetic force acting on a moving electric charge in a magnetic field is perpendicular to the direction of motion. A magnetic force is exerted on an electric charge moving through a uniform magnetic field. An electric charge moving parallel to a magnetic field experiences a magnetic force.
Explanation:
Two people push on the same door from opposite sides as shown. A man pushes on a door from the left. A woman pushes on the door from the right. They will only see the door move when both people exert the same force so that the forces are unbalanced. neither person exerts a force on the door so that the net force is zero. one person exerts more force than the other so that the forces are unbalanced. both people exert the same force so that the forces are balanced.
Answer:
one person exerts more force than the other so that the forces are unbalanced.
Explanation:
Answer:
C.one person exerts more force than the other so that the forces are unbalanced
Explanation:
just took the test
Which planets have craters?
Answer:Mercury, Venus, Earth and Mars.
Explanation: The surfaces of asteroids and the rocky, ice covered moons of the outer gas planets are cratered as well.
A red car passes a blue car. Which is true?
A.
The blue car must be parked.
B.
The red car must be moving backwards.
C.
The blue car must be moving slowly.
D.
The red car is moving faster than the blue car.
Answer:
D
Explanation:
What is the rate at which electrical energy is converted into other forms of energy?
Answer:
Electric power
Explanation:
Electric power is the rate at which electrical energy is converted to or from another form of energy, such as heat or light. The ratio of power to current is called the voltage.
Hope this helps!!!!!!!!!!!!!!
Forever friend and helper,
Cammie:)
Electric power is the rate at which electrical energy is converted into other forms of energy.
What is electrical energy?Electrical energy is the energy derived from electric potential energy or kinetic energy of the charged particles.
Specific examples of electrical energy include:
Alternating current (AC)Direct current (DC)Lightning.Batteries.Capacitors.What is electric power?Electric power is the rate at which work is done or energy is transformed into an electrical circuit. Electric power is measured in watts.
[tex]P = VI[/tex]
Where,
[tex]P[/tex] is the power
[tex]V[/tex] is the potential difference in the circuit.
[tex]I[/tex] is the electric current.
It can also be expressed as
[tex]P = I^{2}R[/tex]
Electric power is the scalar quantity.
Thus, it can be concluded that the rate at which electrical energy is converted into other forms of energy is called electric power.
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(a)
Sam sits in an optician's chair and looks at the chart through the plane mirror in
front of him. He needs to be able to read the letters. They are all capital letters
and Sam is seeing them in a mirror. Why will some letters look incorrect?
Answer:
Because it turn to the next side or i should say in the back.
Explanation:
a light wave strikes the moon and reflects twards Earth. As the light travels to Earth does the wave carry energy and matter, just one or neither?
Answer:
These fields have electric and magnetic energy, therefore the light wave carries energy.
it does not transport matter
Explanation:
Light is an electromagnetic wave formed by the oscillation of electric and magnetic fields.
These fields have electric and magnetic energy, therefore the light wave carries energy.
But the wave does not need matter for its movement, which is why it transports matter. If we use the criterion of special relativity the mass of a light wave that travels at speed must be zero, so with this criterion it does not transport matter either
Final answer:
A light wave reflected from the Moon to Earth carries energy in the form of light and momentum, but it does not carry matter.
Explanation:
When a light wave strikes the moon and is reflected towards Earth, it carries energy but not matter. Light interacts with matter by reflecting, transmitting, or being absorbed, which may convert it into other forms of energy like heat. However, light itself is a form of energy and does not carry matter. The moon reflects sunlight, which then travels to Earth, illuminating the moon phases we observe.
Since light carries momentum as well, the energy transfer occurs when light impacts matter, but the absence of mass means no matter is carried with the light waves as they travel from the Moon to Earth.
Why is it a good idea to discuss gravity and fluid flows when learning about electricity?
Answer:
The flow of fluid molecules in fluid mechanics is synonymous to the flow of electrons in electricity.
Explanation:
The flow of fluid molecules in fluid mechanics is synonymous to the flow of electrons in electricity. Water, when it is falling by the force of gravity, can be used to turn turbines and generators that produce electricity.
A turbine converts the kinetic energy of falling water into mechanical energy. Then a generator converts the mechanical energy from the turbine into electrical energy. Hydroelectric power plants are the most efficient means of producing electric energy.
Discussing gravity and fluid flows is beneficial when learning about electricity due to the analogies between these phenomena, which aid in understanding the behavior of electric charges and circuits. These comparisons help visualize electrical concepts and deepen comprehension of various electrical phenomena and technologies.
Discussing gravity and fluid flows when learning about electricity is crucial due to the similarities in the concepts governing all these phenomena. For instance, electricity is often taught through the analogy of water flow in pipes, where electric current, voltage, and resistance are likened to the flow rate, pressure difference, and pipe size in fluid dynamics. This analogy helps students visualize and understand how electric charges behave in circuits, just as water flows through a system under the influence of gravity. Moreover, the concept of gravitational potential energy in physics is analogous to electric potential energy in electromagnetism, where masses and charges experience forces due to their respective fields. Understanding these analogies deeply enriches the comprehension of electrical phenomena and leads to insights into the behavior of electricity in various mediums, such as solids, liquids, and gases.
Examples such as lightning, the formation of bluish crust on car battery terminals, and the need for electrolytes in sports drinks can be understood better by studying the flow of charged particles. These particles, like fluid in the presence of a gravitational field, respond to electric fields by moving from areas of high potential to low potential, analogous to water flowing downward due to gravity. This comparison between electric and gravitational fields lays a solid foundation for exploring more complex electrical behaviors and technologies.
1. As the skiers move down the mountain their potential energy is converted into what?
2. As the skiers travel down the slope, a portion of their total energy is lost. This means that when they perform their tricks, they will never go as high as they were when they first pushed off from the gate. Describe how this energy is lost?
3. In the ski jump, all skiers launch from the same location. What would cause them to have
different amounts of potential energy?
Answer:
1. Potential energy is converted into kinetic energy since they are in motion.
2. As they slope down, work is done against the dissipative forces e.g; Air resistance, viscosity ( friction ). Hence energy is lost.
3. Different weights and heights at which they started sloping.
[tex]potential \: energy = mgh[/tex]
where mg is the weight.
h is the height moved
therefore, weight and height determines the potential energy.
When skiers descend, their potential energy converts to kinetic energy, which powers their movement. Energy is lost through friction and air resistance, reducing their overall energy. Different skiers can have different potential energy due to their varying mass.
Explanation:1. As the skiers move down the mountain, their potential energy, which is energy stored due to their elevated position, is converted into kinetic energy. This is the energy of motion that allows them to accelerate and move downhill.
2. In theory, potential energy would convert perfectly to kinetic energy. However, in reality, some energy is lost due to friction between the skis and the snow and through air resistance. These forces cause the skiers to lose speed over time, which means they will not be able to reach their original height when performing tricks.
3. Even though all skiers launch from the same location, their potential energy could vary due to differences in mass. According to the formula for potential energy which is PE = mgh (mass x gravity x height), a skier with a larger mass would have more potential energy than a skier with smaller mass, assuming they are at the same height.
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Two charged parallel plates are 0.25 meters away from each other. The field between the plates is 600 . What is the electric potential difference? ΔV = V
Answer:
ΔV = 150 V
Explanation:
Erosion piles up in low places to form:
soil and sand
lava and soil
magma and silt
sand and lava
Answer:
soil and sand
Explanation:
hope it's helpful
PLS HELP WILL MARK BRAINLIEST
Answer:
Using formula: P = I^2 x R, we have:
P = 1.5^2 x 1.26 = 2.835 W
Hope this helps!
:)
Answer:
2.835 Watts
Explanation:
P = I²R
P = 1.5² × 1.26
P = 2.835 Watts
Rank these objects on the basis of their wavelength. (largest to smallest)person v=4.5m/selectron v=0.01cred light v=cproton v=0.01ccar v=27m/sbaseball v=41m/s
Answer:
red light > electron > proton > baseball > person > car
Explanation:
To calculate the wavelength associated to each object, you use the Broglie's relation:
[tex]\lambda=\frac{h}{mv}\\\\[/tex]
h: Planck,s constant = 6.62*10^-34 Js
m: mass
v: velocity
For each object you use an average values of its mass.
person:
mass = 80kg
[tex]\lambda=\frac{6.62*10^{-34}Js}{(80kg)(4.5m/s)}=1.83*10^{-36}m[/tex]
electron:
mass = 9.1*10^{-31}kg
[tex]\lambda=\frac{6.62*10^{-34}Js}{(9.1*10^{-31}kg)(0.01c)}\\\\\lambda=\frac{6.62*10^{-34}Js}{(9.1*10^{-31}kg)(0.01(3*10^{8}m/s))}\\\\\lambda=2.42*10^{-10}m[/tex]
red light:
In this case you use the following formula:
[tex]\lambda=\frac{c}{f}=\frac{3*10^8m/s}{4.3*10^{14}Hz}=6.97*10^{-7}m\approx700nm[/tex]
proton:
mass = 1.67*10^{-27}kg
[tex]\lambda=\frac{6.62*10^{-34}Js}{(1.67*10^{-27}kg)(0.01(3*10^8m/s))}\\\\\lambda=1.32*10^{-13}m[/tex]
car:
mass = 1500kg
[tex]\lambda=\frac{6.62*10^{-34}Js}{(1500kg)(27m/s)}=1.63*10^{-38}m[/tex]
baseball:
mass = 0.145kg
[tex]\lambda=\frac{6.62*10^{-34}Js}{(0.145kg)(41m/s)}\\\\\lambda=1.11*10^{-34}m[/tex]
hence, by comparing the wavelengths of the objects you have:
red light > electron > proton > baseball > person > car
Two protons are 0.00500 m apart. Find the force between them.
Answer:
Force, [tex]F=9.21\times 10^{-24}\ N[/tex]
Explanation:
Charge on proton is [tex]+1.6\times 10^{-19}\ C[/tex].
The electrical force between charges is given by the product of charges and divided by square of distance between them. So, electric force is :
[tex]F=\dfrac{kq^2}{r^2}\\\\F=\dfrac{9\times 10^9\times (1.6\times 10^{-19})^2}{(0.00500 )^2}\\\\F=9.21\times 10^{-24}\ N[/tex]
So, force between protons is [tex]9.21\times 10^{-24}\ N[/tex].
Formerly, when scientists wanted to test substances, such as blood, they had to manually pipette each substance into individual test tubes or plate wells.
Today, there are machines available that can pipette many substances simultaneously. So, a task that used to take hours can now be performed in minutes. This machine is an example of a technology that can help scientists
A.
collect samples.
B.
communicate information.
C.
perform computations.
D.
store data.
FROM STUDY ISLAND
Answer:
A.
collect samples.
Explanation:
The main goal of science is to gain knowledge about the natural world, but this goal is nearly impossible to achieve without technology.
Technologies are products or processes that are created to solve a problem and/or take care of a human need. Technology is often used in science to collect samples, make measurements, collect and store data, analyze data through computations and graphing, and access remote locations, such as outer space.
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Answer: Option A
Explanation:
It is correct
A regular, repeating arrangement of atoms, ions, or molecules is