Answer:
O C. Its particles vibrate slightly.
Explanation:
At absolute zero, atoms would occupy the lowest energy state.They move much less than at higher temperatures, but they still have small vibrations at absolute zero.
Answer:
The answer is B its particles have no kinetic energy
Explanation:
trust the big brain
How many complete wavelengths are present in the sound wave shown? O 1 o 2 4 O 6 09.
Answer:
2
Explanation:
What example is given of a location on Earth where this is occurring?
place's absolute location is its exact place on Earth, often given in terms of latitude and longitude. For example, the Empire State Building is located at 40.7 degrees north (latitude), 74 degrees west (longitude).
Place's absolute location is its exact place on Earth, often given in terms of latitude and longitude.
What is longitude?A point's longitude, which might refer to the east-west position of a point on the surface of the Earth or another celestial body, is a geographic coordinate. The Greek symbol lambda is used to represent the angular measurement, which is often given in degrees.
Latitude is a coordinate used in geography that describes a point's north-south location on the surface of the Earth or another celestial body. Latitude is measured as an angle, with 0° at the Equator and values ranging from -90° at the south pole to 90° at the north pole.
Place's absolute location is its exact place on Earth, often given in terms of latitude and longitude.
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Coherent light with lambda equals 644 n m illuminates on a double slit. The white screen is 6 cm from the slits. The two slits are spaced apart by 2,783 nm. Determine the distance on the screen between the 4th and the 2nd bright fringes above the central maximum.
Answer: 2.77 cm
Explanation:
Given
Wavelength of light is [tex]\lambda=644\ nm[/tex]
White screen is at a distance of [tex]D=6\ cm[/tex]
Distance between two slits is [tex]d=2783\ mm[/tex]
Distance between two bright fringe is [tex]\frac{\lambda D}{d}[/tex]
So, the distance between 4 th and 2nd bright fringe is
[tex]\Rightarrow y_4-y_2=\dfrac{2\lambda D}{d}\\\\\Rightarrow y_4-y_2=\dfrac{2\times 644\times 10^{-9}\times 6\times 10^{-2}}{2783\times 10^{-9}}\\\\\Rightarrow 2.776\times 10^{-2}\ m\\\Rightarrow 2.77\ cm[/tex]
The distance between 4 th and 2 nd brigth fringe is 2.77 cm.
Can’t figure out this problem who can figure this out and give me the answer?
Suppose the spring constant or force constant of the spring is 32.0 N/m and a total of 2.0 kg hangs at the bottom. The mass is smacked upwards from its rest position so that it rises up by 0.40 m before it starts back down. What is the acceleration of the mass at either end of its motion
Answer:
Explanation:
Elongation in the spring when a mass of 2 kg hangs from it
k d = mg where d is the elongation
32 d = 2 x 9.8
d = .6125 m .
When it rises by .40 m , the elongation reduces to .6125 - .40 = .2125 m
upward restoring force at this point = 32 x .2125 = 6.8 N .
Its weight = 2 x 9.8 = 19.6 N acting downwards
Net force on mass of 2 kg = 19.6 - 6.8 N = 12.8 N .
acceleration in downward direction = net force / mass = 12.8 / 2 = 6.4 m/s²
At the bottommost point , total extension = .6125 + .40 = 1.0125 m
restoring force in upward direction = 32 x 1.0125 = 32.4 N .
Net force in upward direction = 32.4 - 19.6 N = 12.8 N
acceleration = 12.8 / 2 = 6.4 m /s² in upward direction .
The physics of wind instruments is based on the concept of standing waves. When the player blows into the mouthpiece, the column of air inside the instrument vibrates, and standing waves are produced. Although the acoustics of wind instruments is complicated, a simple description in terms of open and closed tubes can help in understanding the physical phenomena related to these instruments. For example, a flute can be described as an open-open pipe because a flutist covers the mouthpiece of the flute only partially. Meanwhile, a clarinet can be described as an open-closed pipe because the mouthpiece of the clarinet is almost completely closed by the reed.
What is the frequency of the first possible harmonic after the fundamental frequency in the open-closed pipe described in Part E?
Part E was What length of open-closed pipe would you need to achieve the same fundamental frequency as the open-open pipe discussed in Part A? Half the length of the open-open pipe.
Part A was Consider a pipe of length 80.0 open at both ends. What is the lowest frequency of the sound wave produced when you blow into the pipe? frequency 214 Hz
Answer:
a) λ = 4L, b) L_c = ½ Lₐ, c) f = 214 Hz
Explanation:
a) in this part, the fundamental frequency (1st harmonic) is requested
In a pipe, the side that is closed has a node and the open side has a belly, so the wavelength inside the pipe is ¼ of the wavelength.
λ = 4L
to find the frequency let's use the definition of velocity
v = λ f
f = v /λ
f = v / 4L
b) in this part let's start by finding the resonance for a tube open at both ends
λ = 2 L
f = v / 2L
since they ask for the same frequency, let's match the two expressions
v / 4L_c = v / 2Lₐ
L_c = ½ Lₐ
therefore the length of the closed tube must be half the length of the open tube
c) It is indicated that the length of the open tube is L = 80 cm = 0.80 m
the frequency is
f = v / 2L
f = 343/2 0.8
f = 214 Hz
Scuba divers carry ballast weights to have neutral buoyancy. At that condition, the buoyancy force on the diver exactly balances weight, and there is no tendency either to float toward the surface or to sink. In freshwater, a certain diver carries 10 lb of lead alloy ballast of density 1.1 x 104 kg/m3. During an excursion in seawater, the diver must carry 50% more ballast to remain neutrally buoyant. How much does this diver weigh
Answer:
732.96 N
Explanation:
In fresh water the diver carries ; 10 Ib of lead alloy = 44.5 N
Ballast density : 1.1 * 10^4 kg/m^3
Diver must carry 59% more ballast in seawater
first step : For fresh water
mass of lead alloy in freshwater
mf = wf /g = 44.5 N / 9.81 = 4.536 kg
Volume of lead alloy ballast in fresh water
Vf = mf / plead
= ( 4.536 ) / ( 1.1 * 10^4 ) = 4.1 * 10^ -4 m^3
Second step : For sea water
mass of alloy in seawater
Ms = Ws / g
Ws = 10 Ib + 5 Ib = 15 Ib = 66.75 N
hence ; Ms = 66.75 / 9.81 = 6.804 kg
Volume of alloy in seawater
Vs = Ms / plead = 6.804 / ( 1.1 * 10^4 ) = 6.2 * 10^-4 m^3
Next : considering the diver in freshwater with Ballast weight
= weight of diver + ballast weight (Wf) = ( pfresh * ( V + Vf ) ) * g ---- ( 1 )
where : pfresh = 1000 kg/m^3 , Vf = 4.1 * 10^-4 m^3, g = 9.81 , Wf = 44.5 N
hence equation 1 becomes
W + 44.5 = 9810 * V + 4.1
W + 40.4 = 9810 V --------------- ( 3 )
Considering Diver in seawater with Ballast weight
weight of diver + ballast weight (Ws) = ( psea * ( V + Vs ) ) * g ---- ( 2 )
where : psea = 1026 kg/m^3 , Vs = 6.2 * 10^-4 m^3 , g = 9.81 , Ws = 66.75 N
equation 1 becomes
W + 66.75 = 10065.06 * V + 6.2
W + 60.55 = 10065.06 V
∴ V = ( W + 60.55 )/ 10065.06 ( Input value into equation 3 to determine the weight of the diver )
W + 40.4 = 9810 ( ( W + 60.55 )/ 10065.06 )
10065.6 ( W + 40.4 ) = 9810 ( W + 60.55 )
10065.6 W - 9810 W = 593995.5 - 406650.24
∴ W ( weight of diver ) = 187345.26 / 255.6 = 732.96 N
what do folds on a strip of paper mean
Why might the current in a short circuit be higher than the current in the original circuit?
Answer:
Hope this helps =)
Explanation:
The current in a short circuit may be very high because the resistance in the short circuit is probably less than the resistance in the original circuit.
You see a train that is moving toward you and sounding its
whistle at a constant frequency. Compared to the sound
produced by the whistle, the wavelength of the sound
observed by you is
Answer:
Shorter
Explanation:
i got the same question lol
When a train approaches the observer, the observer hears the sound with high frequency and the wavelenght observed by the observer is shorter.
What is doppler effect?Doppler effect is defined as the phenomenon observed when the a wave from the source is moving towards or moving away from the observer. It gives the relation between the frequency change with respect to the observer.
When a light or sound wave from the source is moving towards the observer, it get compressed. When a light or sound wave is moving away from the observer, it gets stretched.
When the sound wave move towards the observer, the frequency received by the observer is greater. This is called the blue shift. When the sound waves move away from the observer, the frequency received by the observer is lesser. This is called red shift.
Frequency is inversely proportional to the wavelength. In red shift, frequency is lesser and wavelegth is higher. In blue shift, the wavelength is shorter due to higher frequency.
Hence, the train approach the observer, have high frequency and shorter wavelength.
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What is the best explanation for how the plates move?
Answer:
Explanation:
Some geologists favor convection currents in the mantle as the best explanation for plate tectonic movement. It is reasonable to assume that the heat radiated from the core creates convection currents in the mantle, and the mantle rocks begin to move plastically.
please help me with this question
Answer:
Answer is option d
Explanation:
,Mark as brainlist
what is the difference between primary cells and secondary cells?
Answer:
The major difference between a primary cell and the secondary cell is that primary cells are the ones that cannot be charged but secondary cells are the ones that are rechargeable
Explanation:
Answer: The main difference is that while primary cells cannot be charged, secondary cells can be recharged.
Explanation:
A primary cell is an electrochemical that can't be recharged. The chemicals will be replaced regularly e.g. Leclanche cell.
The reactions in a secondary cell can be reversed through an external electrical energy source, heve, they can be recharged. Examples of secondary cells include nickel and lead storage battery.
The main difference is that while primary cells cannot be charged, secondary cells can be recharged.
A pendulum that was originally erected by Foucault at the Pantheon in Paris for the Paris Exhibition in 1851 was restored in 1995. It has a 28.0 kg sphere suspended from a 67.0-m light cable. If the amplitude of the swing is 5.00 m, what is the maximum speed of the sphere
Answer:
13.1 m/s
Explanation: Given that a pendulum that was originally erected by Foucault at the Pantheon in Paris for the Paris Exhibition in 1851 was restored in 1995. It has a 28.0 kg sphere suspended from a 67.0-m light cable. If the amplitude of the swing is 5.00 m, what is the maximum speed of the sphere
The formula to use is :
W = sqrt ( L/g )
Where
L = 67m
g = 9.8m/s^2
A = 5m
Substitute all the parameters into the formula
W = sqrt ( 67 / 9.8 )
W = 2.6
To get the maximum velocity, we use the below formula.
V = wA
V = 2.6 × 5
V = 13.07 m/s
Therefore the maximum speed of the sphere is 13.1 m/s approximately.
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Answer:
The Republican party was formed because they wanted??????
Explanation:
131_I_53 is an artificially made radioactive isotope of iodine, produced during the operation of nuclear power plants and the detonation of nuclear bombs. Exposure to high concentrations of 131 53I represents a serious risk for human health. However, small doses of this radioactive isotope are put to good use in medical studies. 131 53I is widely used in treating thyroid cancer and in diagnosis of abnormal liver and kidney function.
Required:
What is emitted when the radioactive nucleus of 131_I_53 decays to form the stable isotope of xenon 131_Xe_54?
Answer:
one beta particle
Explanation:
Since the atomic number of 131_I_53 increases by one to 131_Xe_54, we have the release of a beta particle since only a beta particle can cause a change in atomic number without a change in mass number. Since a beta particle is one electron, ₋₁⁰e, our nuclear equation is
¹³¹I₅₃ → ¹³¹X₅₄ + ₋₁⁰e
The atomic and mass numbers on both sides are balanced
mass number 131 = 131 + 0 = 131
atomic number 53 = 54 - 1 = 53
Thus a beta particle is emitted
5. Which of the following is velocity? *
2 points
A. 20 m/s
B. 40 m/s east
C. 40 m
D. 20 m
A double-slit interference pattern is created by two narrow slits spaced 0.25 mm apart. Thedistance between the first and the fifth minimum on a screen 60 cm behind the slits is 5.5mm. What is the wavelength (in nm) of the light used in this experiment
Answer:
Explanation:
Slit distance d = .25 x 10⁻³ m .
Distance of screen D = 60 x 10⁻² m
Distance between first and fifth minimum = 5.5 x 10⁻³ m .
There will be four bright fringes between first and 5 th minimum so
distance between them = 4 x λ D / d where λ is the wavelength of light .
Substituting the values
4 x λ x 60 x 10⁻² m / .25 x 10⁻³ m = 5.5 x 10⁻³ m
4 x λ x 60 x 10⁻² m = .25 x 10⁻³ m x 5.5 x 10⁻³ m = 1.375 x 10⁻⁶ m
λ = .005729 x 10⁻⁴
= 572.9 x 10⁻⁹ m
= 572.9 nm .
A grassland ecosystem (ecosystem X) supports 13 different grass species. A different grassland ecosystem (ecosystem Y) supports just one species of grass. Bison graze on all of the grass species in both of these ecosystems. Ecosystem X 13 species of grass Ecosystem Y 1 species of grass A drought strikes both ecosystem X and ecosystem Y, but the bison in ecosystem X are better able to survive it. Which of the following is a likely explanation? A. The bison in ecosystem X only eat one species of grass. B. Ecosystem Y has a greater amount of biomass. C. Ecosystem X has a greater amount of biodiversity. D. Ecosystem Y has a greater amount of biodiversity.
Answer:
Explanation:
Choices are:
A. The bison in ecosystem X only eat one species of grass.
B. Ecosystem Y has a greater amount of biomass.
C. Ecosystem X has a greater amount of biodiversity.
D. Ecosystem Y has a greater amount of biodiversity.
If grass species are drought-resistant, then they will allow the bison to continue feeding on them. X has more species (13) so it is more likely to have some drought-resistant grass.
Answer is C. Ecosystem X has a greater amount of biodiversity.
The bison in ecosystem X are better able to survive the drought because ecosystem X has a greater amount of biodiversity. Option (C) is correct.
What is biodiversity?Biodiversity is the variety of living things found in various habitats, such as terrestrial, marine, and desert ones, as well as the ecological groups to which they belong.
The variety of creatures present in an ecosystem, as well as their relative abundances, is referred to as biodiversity. It also depicts the various stages of organismal organization.
In ecosystem X, 13 different grass species present and in ecosystem Y 1 species of grass present, that is, ecosystem X has a greater amount of biodiversity. So, during the drought, the bison in ecosystem X are better able to survive.
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Would you be more concerned if something you consider precious went through a
chemical change or a physical change? Why?
Can somebody help me please!
Answer:
Explanation:
A chemical change.
Usually those are irreversible. Or they may be reversible, but the form they take may leave your object not the same as they started out.
A physical change might be just as deadly. If the object melted like a chocolate Easter Bunny then the object would be irreversible as well. Take a better example.
Suppose you are talking about a Gold Coin. If you heated it so it melted, the gold would retain its value, but the fact that it is a coin and valuable as such, means that it has lost that part of its value.
I really don't know. My instincts tell me that the chemical change is more dangerous, but I can't rule out the other choice..
Need help for this question. Is the answer true or false
Answer: I think you have the correct answer. (I think it is false.)
Explanation: The Earth's magnetic field is mostly caused by electric currents in the liquid outer core. The Earth's core is hotter than 1043 K, the Curie point temperature above which the orientations of spins within iron become randomized. Such randomization causes the substance to lose its magnetization.
What is reflection of light
Answer: When a ray of light approaches a smooth polished surface and the light ray bounces back, it is called the reflection of light. The incident light ray which lands upon the surface is said to be reflected off the surface. The ray that bounces back is called the reflected ray.
Have a great day and stay safe !
Which exercise type will improve a person's range of motion?
Answer:
stretching prior to an exercise is a great way to improve a range of motion, along with yoga and Pilates!
Which wavelength is most likely seen as violet light?
En un viaje ida y vuelta de 10 kilómetros, el desplazamiento y la distancia recorrida son respectivamente.
(Respuestas en la imagen)
Answer: creo que es A o D
Explanation:
A car battery dies not so much because its voltage drops, but because chemical reactions increase its internal resistance. A good car battery typically has a terminal voltage of about 12.5 V and an internal resistance of about 0.020 Ω. When the battery dies its voltage can drop slightly, let's say it drops to about 10.1 V and the internal resistance increases to around 0.100 Ω.
Required:
a. How much current could the good battery alone drive through the starter motor?
b. How much current is the dead battery alone able to drive through the starter motor?
Answer:
(a) I = 625 A
(b) I = 101 A
Explanation:
The relationship between current, voltage and resistance can be given by Ohm's Law:
V = IR
where,
V = Voltage
I = Current
R = Resistance
(a)
Here,
V = 12.5 V
R = 0.02 Ω
Therefore,
[tex]12.5\ V = I(0.02\ \Omega)\\\\I = \frac{12.5\ V}{0.02\ \Omega}[/tex]
I = 625 A
(b)
Here,
V = 10.1 V
R = 0.1 Ω
Therefore,
[tex]10.1\ V = I(0.1\ \Omega)\\\\I = \frac{10.1\ V}{0.1\ \Omega}[/tex]
I = 101 A
A 1.2-kg mass is projected from ground level with a velocity of 31.3 m/s at some unknown angle above the horizontal. A short time after being projected, the mass barely clears a 16-m tall fence. Disregard air resistance and assume the ground is level. What is the kinetic energy of the mass as it clears the fence
Answer:
The kinetic energy will be "399.65 J".
Explanation:
Given:
Mass,
m = 1.2 kg
Velocity,
v = 31.3 m/s
The total energy of mass will be:
⇒ [tex]E=K+U[/tex]
or,
⇒ [tex]E=.5mv^2+mgh[/tex]
By putting the values, we get
[tex]=.5(1.2)(31.3)^2+0[/tex]
[tex]=0.6\times 979.69+0[/tex]
[tex]=587.81 \ J[/tex]
Since,
The system's total energy is unchanged, then
⇒ [tex]E=K+U[/tex]
or,
⇒ [tex]E=K+mgh[/tex]
[tex]587.81=K+1.2(9.8)(16)[/tex]
[tex]587.81=K+188.16[/tex]
[tex]K=587.81-188.16[/tex]
[tex]=399.65 \ J[/tex]
The energy photon affects which property of light
Answer:
photoelectric effect
Explanation:
When the energy from photons is absorbed by matter, the matter can emit electrons. This process is called the photoelectric effect. The photoelectric effect is a property of light that is not explained by the theory that light is a wave.
A box has a mass of 3 kg. The box is lifted from the floor and placed
on a shelf. If the box gains a Potential Energy of 100 J, then how high
is the shelf?
a 2.34 m
b 1.20 m
C 1.50 m
d 3.40 m
HALP
Explanation:
Potential energy=MGH
100=3×10×H.
H=100/30
H=3.40m
Two particles, with charges of 20.0 nC and -20.0 nC, are fixed at points with coordinates <0, 4.00 cm> and <0, -4.00 cm>. A particle with charge 10.0 nC is fixed at the origin. (a) Find the electric potential energy of the configuration of the three fixed charges. (b) A fourth particle, with a mass of 2.00 x 10-13 kg and charge of 40.0 nC, is released from rest at the point <3.00 cm, 0>. Find its speed after it has moved freely to a very large distance away.
Answer:
Explanation:
Potential energy of the system of charges
= 9 x 10⁹ x [ q₁q₂ / r₁₂ + q₂q₃ / r₂₃ + q₁q₃ / r₁₃ ]
here r₁₂ , r₂₃ , r₁₃ are distance between 1 st and 2 nd charge , 2 nd and 3 rd charge and fist and third charge.
r₁₂ = 8 cm , r₂₃ = 4 cm , r₁₃ = 4 cm.
q₁ = 20 x 10⁻⁹ C , q₂ = - 20 x 10⁻⁹ C , q₃ = 10 x 10⁻⁹ C
Potential energy = 9 x 10⁹ x [ - 400 x 10⁻¹⁸ / .08 + -200x10⁻¹⁸ / .04 + 200 x 10¹⁸ / .04 ]
= 9 x 10⁹ x - 400 x 10⁻¹⁸ / .08
= 45 x 10⁻⁶ J .
b)
Potential at the point of fourth charge due to three charges of 20 nC , - 20 nC and 10 nC at the centre
9 x 10⁹ [ 20 x 10⁻⁹ / .05 + - 20 x 10⁻⁹ / .05 + 10 x 10⁻⁹ / .03 ]
= 9 x 10⁹ x 10 x 10⁻⁹ / .03
= 3000 V .
potential energy of fourth particle = charge x potential
= 3000 x 40 x 10⁻⁹ = 12 x 10⁻⁵ J .
kinetic energy at infinity = 12 x 10⁻⁵ J
1/2 m v² = 12 x 10⁻⁵ J
.5 x 2 x 10⁻¹³ x v² = 12 x 10⁻⁵
v² = 12 x 10⁸
v = 3.46 x 10⁴ m/s
= 9 x 10⁹