In this layer of Earth's atmosphere, hydrogen and helium are the prime gases and are only present at extremely low densities. What is this layer of the atmosphere called?
A) exosphere
B) ionosphere.
C) mesosphere
D) thermosphere
Select all that apply.
Images produced by a flat mirror are _____.
inverted (upside down)
left-right reversed
upright
diminished in size
enlarged
real
virtual
Answer:
-left-right reversed
-upright
-virtual
I just did this in my lesson.
Which describes how a turbine works to produce energy for electricity? A. Energy from various energy sources, such as wind or from burning fossil fuels, is used to spin the blades of the turbine. The turbine then powers a generator, which produces electricity. B. Energy from various energy sources, such as wind or from burning fossil fuels, is used to spin the blades of the turbine, which produces electricity. C. The turbine produces energy from various energy sources like wind or burning fossil fuels to drive the generator to make electricity. D. The generator produces energy from various energy sources like wind or burning fossil fuels to drive the turbine to make electricity.
Answer:
A. Energy from various energy sources, such as wind or from burning fossil fuels, is used to spin the blades of the turbine.
Explanation:
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a 920-g empty iron kettle is out on a hot stove. how much heat must the kettle absorb to raise its temperature 15.0 Celsius to 93.0 celsius the especific heat capacity iron is 470 j/kg * k
The iron kettle must absorb 33,768 joules of heat energy to raise its temperature from 15.0 Celsius to 93.0 Celsius.
Explanation:To calculate the amount of heat the iron kettle must absorb, we can use the formula:
q = mcΔT
where:
q is the heat absorbed (in joules)m is the mass of the iron kettle (in grams)c is the specific heat capacity (in J/g°C)ΔT is the change in temperature (in Celsius)Plugging in the given values:
q = (920g) x (0.470 J/g°C) x (93.0°C - 15.0°C)
q = (920g) x (0.470 J/g°C) x (78.0°C)
q = (920g) x (36.66 J/°C)
q = 33768 J
Therefore, the iron kettle must absorb 33,768 joules of heat energy to raise its temperature from 15.0 Celsius to 93.0 Celsius.
what is the energy (in eV units) carried by one photon violet light that has a wavelength of 4.5e-7?
A photon of violet light with a wavelength of 4.5×10⁻⁷ meters carries approximately 2.75 electron-volts (eV) of energy.
To find the energy of a photon of violet light with a wavelength of 4.5×10⁻⁷ meters, we can use the formula for energy in terms of wavelength:
Energy (E) = h * c / λ
Here,
h is Planck's constant (6.626 × 10⁻³⁴ J·s)c is the speed of light (3 × 10⁸ m/s)λ is the wavelength (4.5 × 10⁻⁷ meters)Substituting the values into the formula:
E = (6.626 × 10⁻³⁴ J·s) * (3 × 10⁸ m/s) / (4.5 × 10⁻⁷ m)
E = 4.414 × 10⁻¹⁹ J
Since we want the energy in electron-volts (eV), we convert from joules using the conversion factor 1 eV = 1.602 × 10⁻¹⁹ J:
E = (4.414 × 10⁻¹⁹ J) / (1.602 × 10⁻¹⁹ J/eV)
E ≈ 2.75 eV
Therefore, a photon of violet light with a wavelength of 4.5×10⁻⁷ meters carries approximately 2.75 eV of energy.
For a certain transverse wave, the distance between two successive crests is 1.20 m and eight additional crests pass a given point along the direction of travel every 13.00 s. calculate the wave speed.
The wave speed is calculated using the frequency and the wavelength. With the provided distance between crests (1.20 m) and the time for crests to pass (13 s), the wave speed is found to be approximately 0.8308 m/s.
Explanation:The distance between two successive crests of a transverse wave is equal to one wavelength. If eight additional crests pass a given point in 13 seconds, it means that nine crests in total pass that point in 13 seconds because the first crest is observed at the beginning of the timing. The speed of the wave (v) can be calculated using the formula v = frequency x wavelength. Here, the wavelength (λ) is given as 1.20 meters.
To find the frequency, we use the number of waves passing a point divided by the time taken. Therefore, the frequency (f) is 9 crests / 13 seconds = 0.6923 Hz (where Hz represents Hertz or cycles per second).
Using the wave speed formula, we obtain the speed: v = 0.6923 Hz x 1.20 m = 0.8308 m/s. Thus, the wave speed is approximately 0.8308 meters per second.
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A 4.0 ω resistor, an 8.0 ω resistor, and a 13.0 ω resistor are connected in parallel across a 24.0 v battery. what is the equivalent resistance of the circuit? answer in units of ω.
sound
· parallel
· mechanical
· not a vacuum
· needs a medium
· compressions and rarefaction
What type of wave is being described?
A) compaction
B) electromagnetic
C) longitudinal
D) transverse
It is a longitudinal wave. In a longitudinal wave the particles of the medium vibrate in a direction parallel to the direction of energy transport. Sound waves are mechanical waves as well as longitudinal waves that require a medium. They do not travel through a vacuum.
a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together
Sedimentary rock is formed from the compaction and cementation of sediment originating from other rocks or organic material. This process results in various types of sedimentary rocks, like sandstone and shale.
The type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together is known as sedimentary rock. These rocks are created through a multi-step process starting with the deposition of sediment that comes from the weathering and erosion of pre-existing rocks (clasts), or from the accumulation of plant and animal material. Over time, these deposited sediments may harden into rock through two main processes:
Compaction: where sediments are squeezed together under the weight of sediments above them.
Cementation: where minerals fill in the spaces between the loose sediment particles.
This process creates various types of sedimentary rocks, such as clastic rocks which are fragments compacted and cemented together, and organic sedimentary rocks which are formed from the lithification of organic material. Examples of sedimentary rocks include sandstone, formed from cemented sand; shale, formed from compressed mud and silt; and conglomerate, composed of cemented gravel and pebbles.
Photons of what minimum frequency are required to remove electrons from gold? note: the work function for gold is 4.8 ev.
When touched by a plastic straw, the metal sphere will do what?
if an observer is hearing a rise in pitch that means the frequency of the waves in their position are falling
Tony made 14 liters of lemonade for a party. His guests drank 9500 mL of the lemonade. After the party Tony had mL of lemonade left over.
Answer:
4500
Explanation:
What is the frequency of a pressure wave of wavelength 2.5 m that is traveling at 1400 m/s?
Determine the number of unpaired electrons in the octahedral coordination complex [fex6]3–, where x = any halide.
Unpaired electron is the electron, that occupies the a place in orbital without the pair of electron. The number of unpaired electron in 3d sub shell of octahedral coordination complex [tex][FeX_6]^{2-}[/tex] is 3.
The given octahedral coordination complex in the problem is [tex]{FeX_6]^{2-}[/tex]
Here, [tex]X[/tex] is the halogen.
What is unpaired electron?Unpaired electron is the electron, that occupies the a place in orbital without the pair of electron.
In the given complex ion +3 oxidation state [tex]F[/tex] (iron) represents in,
[tex]_{26}F^{3+}=1s^2, 2s^2 2p^6, 3s^23p^63d^6,4s^2\\[/tex]
[tex]F^{3+}=1s^2, 2s^2 2p^6, 3s^23p^63d^6[/tex]
As the unpaired electron in 3d sub shell is 3.
Hence the number of unpaired electron in 3d sub shell of octahedral coordination complex [tex][FeX_6]^{2-}[/tex] is 3.
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Final answer:
The [FeX₆]³− octahedral complex, with iron in a d5 configuration and halides as weak field ligands, will have five unpaired electrons due to the high-spin configuration created by the ligands.
Explanation:
To determine the number of unpaired electrons in the octahedral coordination complex [FeX₆]³−, where X represents any halide, we will apply crystal field theory (CFT). First, we note that iron in this complex exists in a +3 oxidation state, which gives it a d5 electron configuration since the neutral iron atom has 8 valence electrons (3d6 4s2).
For any halide as a weak field ligand in an octahedral complex, the crystal field splitting is not sufficient to overcome the electron pairing energy. This results in a high-spin complex for iron (III), where all the d-orbitals initially receive one electron each before any pairing occurs.
Thus, the [FeX₆]³− complex will have five unpaired electrons, one in each of the 3d orbitals, as halides create a high-spin configuration for a d5 metal ion like iron (III).
A charged particle is projected with its initial velocity parallel to a uniform magnetic field. what is the resulting path? 1. parabolic arc. 2. circular arc. 3. straight line parallel to the field. 4. straight line perpendicular to the field. 5. spiral.
If a charged particle is projected with its initial velocity parallel to a uniform magnetic field, then the resulting path would be a straight line parallel to the field, therefore the correct answer is option 3.
What is a magnetic field?A magnetic field could be understood as an area around a magnet, magnetic material, or an electric charge in which magnetic force is exerted .
As given in the problem if a charged particle is projected with its initial velocity parallel to a uniform magnetic field then we have to find out what would be the resulting path of the particle .
Thus , the right response is option 3, as the path of a charged particle projected with its starting velocity parallel to a uniform magnetic field would be a straight line parallel to the field .
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A block oscillating on a spring has a maximum speed of 20 cm/s. part a what will the block's maximum speed be if its total energy is doubled?
Final answer:
When the total energy of a system consisting of a block and a spring is doubled, the new maximum speed of the block will be sqrt(2) times its original maximum speed. If the original speed was 20 cm/s, the new max speed will be about 28.28 cm/s.
Explanation:
The maximum speed of a block oscillating on a spring is determined by its total mechanical energy, which is the sum of its kinetic and potential energy. In a frictionless system, when the kinetic energy is maximum, the potential energy is zero, and vice versa. When the total energy of the system is doubled, both the kinetic and potential energy will double when the block is at their maximum values. Since the maximum speed (v_max) is directly related to the maximum kinetic energy (which is 1/2 m v_max^2, where m is the mass of the block), if the total energy doubles and mass remains the same, the new maximum speed will be the square root of 2 times the original maximum speed. Hence, if the original maximum speed is 20 cm/s, the new maximum speed will be 20 cm/s * sqrt(2), approximately equal to 28.28 cm/s.
Given the initial maximum speed of 20 cm/s, the new maximum speed will be approximately 28.3 cm/s.
To determine the block's maximum speed when its total energy is doubled, we need to understand how the energy in a spring-mass system is related to its speed.
In a spring-mass system, the total mechanical energy (E) is the sum of its potential energy (U) and kinetic energy (K). The equation for kinetic energy (K) at maximum speed (V(max)) is given by:
K = ½mV(max)²where
m is the mass of the block.Since the problem states that the initial maximum speed (V(max)) is 20 cm/s (or 0.2 m/s), we need to find the new maximum speed when the total energy is doubled.
Knowing that the total energy is proportional to the square of the maximum speed, we can set up the following relationship:
E_new = 2E_originalConsidering the kinetic energy component:
½mV(max_new)² = 2(½mV(max)²)Canceling out the common factors, we get:
V(max_new)² = 2V(max)²V(max_new) = sqrt(2) * V(max)Given the initial maximum speed (V(max)) is 20 cm/s:
V(max_new) = sqrt(2) * 20 cm/s ≈ 1.414 * 20 cm/s V(max_new) ≈ 28.3 cm/sThus, the block's maximum speed will be approximately 28.3 cm/s if its total energy is doubled.
What is the relationship between radiopharmaceuticals, tracers, and radionuclides?
Answer:
They are all radioactive
Explanation:
Radiopharmaceuticals, or medicinal radiocompounds, are a group of pharmaceuticals that contain radioactive isotopes. Radiopharmaceuticals are used as diagnostic and therapeutic agents.
A radioactive tracer, is a chemical compound in which one or more atoms have been replaced by a radionuclide so that as a result of of its radioactive decay the nuclide can be used to explore the mechanism of chemical reactions by carefully tracing the path that the radioisotope follows from reactants to products.
Radionuclides are species of atoms that emit radiation by undergoing radioactive decay leading to the emission of alpha particles (α), beta particles (β), or gamma rays (γ).
From the foregoing, radiopharmaceuticals, tracers, and radionuclides are all radioactive materials. Hence the answer.
At what rate must electrons in a wire vibrate to emit microwaves with a wavelength of 1.00 mm
Answer:
f = 3×10¹¹ Hz
Explanation:
Relation ship between frequency and wavelength
"The wave speed (v) is defined as the distance traveled by a wave per unit time. If considered that the wave travels a distance of one wavelength in one period,
ν=λ/T
As we know that T = 1/f, hence we can express the above equation as,
V = f λ
The wave speed is equal to the product of its frequency and wavelength, and this implies the relationship between frequency and wavelength."
The relation between frequency and wavelength is
λ×f = c
c = speed of light = 3×10⁸ m/s
λ = 1.00 mm = 10⁻³ m
f=c/λ
f=(3×10⁸ m/s)/ 10⁻³ m
f = 3×10¹¹ Hz
If the potential across two parallel plates, separated by 3 cm, is 12 volts, what is the electric field strength in volts per meter? E = _____ volts/m
Answer:
E = 400 V/m
Explanation:
It is given that, for a parallel plates :
Potential difference, V = 12 volts
Separation between the plates, d = 3 cm = 0.03 m
The relation between the electric field and the electric potential is given as :
[tex]E=\dfrac{V}{d}[/tex]
[tex]E=\dfrac{12\ V}{0.03\ m}[/tex]
E = 400 volts/m
So, the strength of the electric field is 400 V/m.
What is the electric potential energy of a charge that experiences a force of 3.6 x 10^-4N when it is 9.8 x 10^-5 from the source of the electric field
What is the wavelength corresponding to the most intense light emitted by a giant star of surface temperature 4400 k?
Final answer:
The wavelength corresponding to the most intense light emitted by a giant star with a surface temperature of 4400 K is approximately 681.8 nm.
Explanation:
According to Wien's law, the wavelength at which the most intense light is emitted by a giant star can be determined using the formula:
wavelength = 3 x 10^6 / temperature
In this case, the surface temperature of the giant star is 4400 K. Plugging in this value into the formula, we get:
wavelength = 3 x 10^6 / 4400 = 681.8 nm
Therefore, the wavelength corresponding to the most intense light emitted by the giant star is approximately 681.8 nm.
Microwave ovens emit microwave energy with a wavelength of 13.0 cm. what is the energy of exactly one photon of this microwave radiation?
The energy of exactly one photon of this microwave radiation is 1.53 × 10⁻²⁴Joule
Further explanationThe term of package of electromagnetic wave radiation energy was first introduced by Max Planck. He termed it with photons with the magnitude is:
[tex]\large {\boxed {E = h \times f}}[/tex]
E = Energi of A Photon ( Joule )
h = Planck's Constant ( 6.63 × 10⁻³⁴ Js )
f = Frequency of Eletromagnetic Wave ( Hz )
The photoelectric effect is an effect in which electrons are released from the metal surface when illuminated by electromagnetic waves with large enough of radiation energy.
[tex]\large {\boxed {E = \frac{1}{2}mv^2 + \Phi}}[/tex]
[tex]\large {\boxed {E = qV + \Phi}}[/tex]
E = Energi of A Photon ( Joule )
m = Mass of an Electron ( kg )
v = Electron Release Speed ( m/s )
Ф = Work Function of Metal ( Joule )
q = Charge of an Electron ( Coulomb )
V = Stopping Potential ( Volt )
Let us now tackle the problem!
Given:
λ = 13.0 cm = 13.0 × 10⁻² m
Unknown:
E = ?
Solution:
[tex]E = h f[/tex]
[tex]E = h \frac{c}{\lambda}[/tex]
[tex]E = 6.63 \times 10^{-34} \frac{3 \times 10^8}{13.0 \times 10^{-2}}[/tex]
[tex]\large {\boxed {E = 1.53 \times 10^{-24} ~ Joule } }[/tex]
Learn morePhotoelectric Effect : https://brainly.com/question/1408276Statements about the Photoelectric Effect : https://brainly.com/question/9260704Rutherford model and Photoelecric Effect : https://brainly.com/question/1458544Photoelectric Threshold Wavelength : https://brainly.com/question/10015690Answer detailsGrade: High School
Subject: Physics
Chapter: Quantum Physics
Keywords: Quantum , Photoelectric , Effect , Threshold , Frequency , Electronvolt
2) calculate the wavelength, in nanometers, of infrared radiation that has a frequency of 9.76 x 1013 hz.
The wavelength of infrared radiation with a frequency of 9.76 x 10^13 Hz is calculated to be 3070 nanometers by using the relationship between wavelength, frequency, and the speed of light.
The question asks us to calculate the wavelength of infrared radiation with a given frequency of 9.76 x 1013 hertz (Hz). To find the wavelength, we will use the formula that relates wavelength (λ), frequency (ƒ), and the speed of light (c):
λν = c
Where λ is the wavelength, ν is the frequency, and c is the speed of light (c = 3 x 108 meters per second). Solving for λ, we get:
λ = c / ν
Now we can plug in the given values:
λ = (3 x 108 m/s) / (9.76 x 1013 Hz)
λ = 3.07 x 10-6 meters
Since the question asks for the wavelength in nanometers, we convert meters to nanometers by multiplying by 109:
λ = 3.07 x 10-6 meters x 109 nm/meter
λ = 3070 nm
Therefore, the wavelength of the infrared radiation is 3070 nanometers.
If a magnet is broken into two pieces what happens to the magnetic poles?
Answer:
B.) Each piece will still have a north pole and a south pole
Explanation:
I just did it
When a bar magnet is cut into two pieces, each half becomes a smaller magnet with its own north and south pole. Magnetic domains within the magnet ensure that these poles always exist in pairs, a fundamental characteristic of magnets called magnetic dipoles, and cannot be isolated. Even at the smallest scale, no magnet exists with only a single pole.
Explanation:If you cut a bar magnet into two pieces, you will not end up with one piece having two north poles and another piece having two south poles. Instead, each piece will have its own north and south pole, making each piece a smaller, complete magnet. This property is consistent even down to the smallest particles with magnetic properties.
All magnets have a north and a south pole, and they always occur in pairs—this is why they are called magnetic dipoles ('di' meaning two). The presence of both poles in any fragment of a magnet implies that if you were to continue cutting the magnet, no matter how small, you would still get pieces with both a north and a south pole. No matter the size, from subatomic particles to stars, a magnet cannot have a single isolated pole.
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What is the highest point on this map?
A. 30 meters
B. 35 meters
C. 52 meters
D. 60 meters
where should the property "little voltage loss across long distances" be placed in a Venn Diagram?
A) direct current
B) alternating current
C) both alternating and direct current
D) neither alternating nor direct current
The answer is B i know this because i just did it on usatestprep
When a baseball player catches a baseball, the glove "gives" or moves backward. How does this movement affect the change in momentum of the baseball?
A The change in momentum increases because the impact time increases.
B The change in momentum stays the same because the ball still comes to a stop.
Answer:
The change in momentum increases because the impact time increases.
Explanation:
When a baseball player catches a baseball, the glove "gives" or moves backward. Momentum of a body is equal to the product of mass and velocity. Also, the change of momentum of an object when it is acted by a force is called impulse. It is represented by J. Mathematically, it can be written as :
[tex]J=F.\Delta t=m\Delta v[/tex]
F is applied force
[tex]\Delta t[/tex] is the time taken by an object to change its momentum
The momentum depends on the force and the time of impact. In this case, as the a baseball player catches a baseball, the gloves move in backward direction. By doing so, the ball comes to rest in larger time.
So, the change in momentum increases because the impact time increases.
Why does the amount of water that flows in a river change during the year?
An ice skater starts a spin with her arms stretched out to the sides. she balances on the tip of one skate to turn without friction. she then pulls her arms in so that her moment of inertia decreases by a factor of two. in the process of her doing so, what happens to her kinetic energy?
I₁ = initial moment of inertia before pulling in the arms
I₂ = final moment of inertia after pulling in the arms = I₁ /2
w₁ = initial angular velocity before pulling in the arms
w₂ = final angular velocity after pulling in the arms
using conservation of angular momentum
I₁ w₁ = I₂ w₂
I₁ w₁ = (I₁/2 ) w₂
w₂ = 2 w₁
KE₁ = initial rotational kinetic energy before pulling in the arms = (0.5) I₁ w²₁
KE₂ = final rotational kinetic energy after pulling in the arms = (0.5) I₂ w²₂
Ratio of final rotational kinetic energy to initial rotational kinetic energy is given as
KE₂ /KE₁ = (0.5) I₂ w²₂/((0.5) I₁ w²₁ )
KE₂ /KE₁ = ((I₁/2 ) (2 w₁)²)/(I₁ w²₁)
KE₂ /KE₁ = 2
KE₂ = 2 KE₁
hence the kinetic energy becomes twice