Through what potential difference ΔV must electrons be accelerated (from rest) so that they will have the same wavelength as an x-ray of wavelength 0.150 nm ? Use 6.63×10−34 J⋅s for Planck's constant, 9.11×10−31 kg for the mass of an electron, and 1.60×10−19 C for the charge on an electron. Express your answer using three significant figures.

Answer: Statements A, C, and E are true

Explanation:  Half life is the time required for one half of a radioactive substance to decay into its daughter material. Since the half life of the radioactive material is 2 hours, it means that in 2 hours the material will have decayed by 50% and after 4 hours, the material will have decayed by 75%

Answer:

[tex]1.95\cdot 10^{-10}m[/tex]

Explanation:

First of all, we need to calculate the energy of the x-ray photon emitted during the transition from K-shell to L-shell, and this energy is equal to the difference in energy between the two levels:

[tex]E=E_K-E_L=8500 eV-2125 eV=6375 eV[/tex]

Converting into Joules,

[tex]E=6375 eV \cdot (1.6\cdot 10^{-19} J/eV)=1.02\cdot 10^{-15} J[/tex]

Now we know that the energy of the photon is related to its wavelength by:

[tex]E=\frac{hc}{\lambda}[/tex]

where

h is the Planck constant

c is the speed of light

[tex]\lambda[/tex] is the wavelength

Re-arranging the equation for [tex]\lambda[/tex], we find

[tex]\lambda=\frac{hc}{E}=\frac{(6.63\cdot 10^{-34}Js)(3\cdot 10^8 m/s)}{1.02\cdot 10^{-15} J}=1.95\cdot 10^{-10}m[/tex]

Answer:

The average kinetic energy of gas molecules increases with increasing temperature

There are gas molecules that move faster than the average

The average speed of gas molecules decreases with decreasing temperature

All the gas molecules in a sample cannot have the same kinetic energy

Explanation:

The average kinetic energy of the particles in an ideal monoatomic gas is given by:

[tex]E_k = \frac{3}{2}kT[/tex] (1)

where

k is the Boltzmann constant

T is the absolute temperature of the gas

While the rms speed of the particles in a gas is given by

[tex]v_{rms}= \sqrt{\frac{3RT}{M}}[/tex] (2)

where

R is the gas constant

T is the absolute temperature

M is the molar mass

Let's now analyze each statement:

- The average kinetic energy of gas molecules increases with increasing temperature  --> TRUE. If we look at eq.(1), we see that the average kinetic energy is directly proportional to the temperature.

- There are gas molecules that move faster than the average --> TRUE. The distribution of the speed of the particles in a gas is spread around the rms speed, but of course not all the particles are moving at that speed: some particles are moving faster, while some are moving slower.

- The temperature of a gas sample is independent of the average kinetic energy --> FALSE. As we see from eq.(1), the two quantities are related to each other.

- The average speed of gas molecules decreases with decreasing temperature --> TRUE. As we see from eq.(2), the average speed is proportional to the square root of the temperature: so, when the temperature decreases, the average speed decreases as well.

- All the gas molecules in a sample cannot have the same kinetic energy --> TRUE. In fact, each particle will have a different kinetic energy, depending on its speed (different speed means also different kinetic energy).

The Kinetic Molecular Theory denotes that with an increase in temperature, the average kinetic energy and speed of gas molecules also increase. Gas molecules can move faster or slower than the average speed, hence all molecules will not have the same kinetic energy. The temperature of a gas is not independent of the average kinetic energy.

The Kinetic Molecular Theory of gases explains some key aspects of molecular motion within gases. The theory denotes that molecules are constantly in motion and the average speed of these molecules is determined by their absolute temperatures. As the temperature increases, so too does the average kinetic energy of the molecules, which in turn increases their speed.

Not all molecules in a gas sample will have the same kinetic energy; some will move faster than the average speed and others slower, lending to what we refer to as the average kinetic energy and average speed. The typical or root mean square (rms) speed of a particle with average kinetic energy can be expressed using the equation: vrms=√3RT/M, where R is the ideal gas constant, T is the absolute temperature, and M is the molar mass.

Moving on towards the state comparisons, the following statements are true: The average kinetic energy of gas molecules increases with increasing temperature; gas molecules can indeed move faster than the average speed; with a decrease in temperature, the average speed of the gas molecules decreases; all the gas molecules in a sample do not possess the same kinetic energy. The statement that classifies temperature of a gas sample as independent of the average kinetic energy is false.

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Technician-A is correct.  His statement: "In a parallel circuit, the more branches that are added, the more current flow increases." is technically true.

Technician-B is incorrect.  His statement: "A series-parallel circuit is made of parallel branches only." is technically false.

The more branches a parallel circuit has the more current flow in the circuit therefore ; Technician A is correct while Technician B is wrong

In a parallel circuit the increase in branches will lead a corresponding increase in the amount of current flow through the circuit because the Total amount of current flowing through a parallel circuit is a summation of the individual currents flowing through the branches

i.e.  [tex]I_{T} = I_{1} + I_{2} + I_{3}[/tex]

But A series-parallel circuit is made up of both parallel and series branches as the name implies therefore Technician B is wrong

Hence we can conclude that the more branches a parallel circuit has the more current flow in the circuit hence Technician A is correct.

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Answer:

At point 4

Explanation:

Subduction is a geologic process which occurs at convergent plate margins.

Subduction occurs when a denser lithospheric plate goes beneath the lighter one. Generally, the lithosphere is made up of the crust and part of the mantle. The two moves slowly on the weak and plastic asthenosphere.

In a convergent plate margin, two plates comes together. When two plates comes together, it is either we have collision or subduction. When subduction occurs, denser plates goes beneath the less dense ones.

The average density of the continental crust is 2.9g/cm³ while that of the oceanic crust is 3.3g/cm³. The oceanic crust geos beneath the continental crust because it is denser. This is subduction.

Answer:

the answer is 4

Explanation:

According to Hubble  galaxies are classified into elliptical, spiral and irregular.

It should be noted this classification is based only on the visual appearance of the galaxy, and does not take into account other aspects, such as the rate of star formation or the activity of the galactic nucleus.  

The classification is as follows:  

1. Elliptical galaxies: Their main characteristic is that the concentration of stars decreases from the nucleus, which is small and very bright, towards its edges. In addition, they contain a large population of old stars, usually little gas and dust, and some newly formed stars.  

2. Spiral galaxies: They have the shape of flattened disks containing some old stars and also a large population of young stars, enough gas and dust, and molecular clouds that are the birthplace of the stars.  

3. Irregular Galaxies:  Galaxies that do not have well-defined structure and symmetry.  

In this context, galaxy M82 does not match with the first two types of galaxies, because it has not a defined shape.

Therefore, M82 is an  irregular galaxy.

Answer:

The protons will shift towards the negatively charged rod and the electrons will shift away

Explanation:

When negatively charged rod is brought near it , in sphere protons ( positively charge ) get attracted on the surface and electron get away (negatively charge) due to induction

Charging by induction is a process by which a neutral body can be charged electrostatically in the presence of a negatively or positively charged body.

Whenever a charged body is placed over a neutral conducting material that conducting material will induce an opposite charge to the charged body because of induction . Example : if charged body have positive charge than conducting material  will induce a negative charge on it

hence , when negatively charged rod is brought near it , in sphere protons ( positively charge ) get attracted on the surface and electron get away (negatively charge) due to induction

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Answer:

Jupiter

Largest Planet: Jupiter. The largest planet in our solar system by far is Jupiter, which beats out all the other planets in both mass and volume. Jupiter's mass is more than 300 times that of Earth, and its diameter, at 140,000 km, is about 11 times Earth's diameter.

Explanation:

The total rotational kinetic energy of this system is : ( C ) none of these

Ker =  Iw²

Given that the two disks have the same rotational inertia and the same angular speed but opposite angular velocities

w and -w

Total rotational kinetic energy ( Kr )

K.Er = K₁ + K₂

     = [tex]\frac{1}{2} * Iw^2 + \frac{1}{2} * I (-w)^2[/tex]

     = [tex]Iw^2[/tex]

Hence the total rotational kinetic energy of the system is : Iw²

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The total rotational kinetic energy of the system of two disks spinning with the same angular speed but in opposite directions is Kr = Iω², since the kinetic energy for both disks will be the same positive value when squared.

Given that both disks have the same rotational inertia (I) and angular speed (ω), we can calculate the total kinetic energy using the formula for rotational kinetic energy K = ½Iω² for each disk individually and then combine the results.

For the first disk with angular velocity ω:
K1 = ½Iω²

For the second disk with angular velocity -ω:
K2 = ½I(-ω)²
Since squaring a negative number yields a positive result, the kinetic energy for both disks will be positive and the same value.

Therefore, the total rotational kinetic energy is:
Kr = K1 + K2 = ½Iω² + ½Iω² = Iω²

Answer:

C

Explanation: when an object gets in front of a light, it temporarily breaks the beaks the beam from the light source to the user. the same occurs when a planet gets in front of a star. i don't feel like explaining the doppler effect but this is basically it.

hope this helped

Answer:

The electrical force is 9N

Explanation:

For point loads,  charged bodies very small compared to the distance r that separates them,  Coulomb discovered that the electric force is proportional to [tex]\frac{1}{r^{2}}[/tex]. So, if the distance is doubled, the force will decrease a [tex]\frac{1}{4}[/tex] of its initial value.

[tex]F=\frac{36N}{4}=9N[/tex]

When the distance between two charged objects is doubled, the electrostatic force between them becomes one-fourth of the original force. Thus, if the original force is 36 N, the new force would be 9 N.

The force between two charges is governed by Coulomb's Law, which states that the electrostatic force (F) between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance (r) between them. The law is mathematically expressed as F = k * (|q1*q2|) / r², where k is Coulomb's constant. If the distance between two charges is doubled, since the force is inversely proportional to the square of the distance, the new force will be one-fourth of the original force.

Thus, if the initial force is 36 N and the distance is doubled, the new force is calculated as:

Initial force: 36 N

New distance: 2r

New force (F') = F / (22) = 36 N / 4 = 9 N

Therefore, the new electrostatic force between the two objects when the distance is doubled would be 9 N.

Answer:

The answer is ionic bond

Explanation:

Answer:

formed in the middle of a plate

formed where mantle erupts through crust

Explanation:

The Hawaiian Islands are Volcanoes that formed right in the middle of the Pacific plate which is moving North-westward.

Lithospheric plates lies on the weak and plastic asthenosphere. Such is the Pacific plate too. The weak asthenosphere can erupt on the surface if it gets access through faulting or other geologic conduits. When these mantle magma reaches the surface, they form hotpots on the crust.

The Hawaiian island is a series of these hotspot as it forms when mantle materials upwells to the surface. The hotspot from which the magma is sourced is relatively fixed. The moving plate is what leads to the eruption of the magma at several other parts in the crust.

The circular but relatively flat portion of the galaxy is the Disk

A galaxy that resembles a circle is known as a ring galaxy. Art Hoag's 1950 discovery of Hoag's Object is an illustration of a ring galaxy. Many big, relatively young blue stars that are quite brilliant can be found in the ring.

Galactic disks are thin, essentially circular collections of stars, gas, and dust; this matter revolves around a common core in almost circular orbits. As a result of this rotation, many disks have lovely spiral patterns, and some have distinct bars crossing their centres.

Nearly all of our galaxy's gas, dust, hot young stars, and star-forming regions are present there. When viewed from above, the disk reveals spiral arms that contain the majority of the ISM's cool, dense regions.

Therefore, Our galaxy's disk is incredibly narrow, only around 100 times wider than its own height.

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Vector A has the greater x-component, while vector B has the greater y-component.

The x-component of a vector can be calculated by multiplying its magnitude by the cosine of the angle it makes with the x-axis. For vector A, the x-component is 50 units (since it lies entirely on the x-axis). For vector B, the x-component equals 120 units * cos(70 degrees) = 40.96 units. So, vector A has the greater x-component.

The y-component of a vector can be calculated by multiplying its magnitude by the sine of the angle it makes with the x-axis. For vector A, the y-component is 0 (since it lies completely on the x-axis). For vector B, the y-component equals 120 units * sin(70 degrees) = 112.90 units. So, vector B has the greater y-component.

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Answer:

It is most likely the word elliptical.

Explanation:

Usually the term elliptical refers to the oval-like shape of a substance or path of an object.  The question states, "Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals."  Because the planets orbit around the sun in an oval-like path, those orbits can be described as elliptical.  Scientists also normally use this word to describe the same thing; Therefore, your answer is elliptical.

Planets in our solar system do not revolve around the sun in perfect circles. They revolve in the elliptical orbits.

The solar system consists of the planet's satellites, as well as numerous comets, asteroids, and meteoroids, as well as the interplanetary medium.

Planets in our solar system do not revolve around the sun in perfect circles. They revolve in the elliptical orbits.

Hence, option D is correct.

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physical:1.Hydrogen is a colorless,tasteless and odourless gas.2.Hydrogen is the least dense of all elements.

chemical:1.hydrogen is very combustible in the presence of oxygen.2.hydrogen is very reactive with most elements.

Answer: Hydrogen is a colorless, tasteless, and odorless gas : Physical property

Hydrogen is very combustible in the presence of oxygen: Chemical property

Hydrogen is very reactive with most elements :  Chemical property

Hydrogen is the least dense of all elements:  Physical property

Explanation:

Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.

Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.

Hydrogen is a colorless, tasteless, and odorless gas  is a physical property.

Hydrogen is very combustible in the presence of oxygen is a chemical property.

Hydrogen is very reactive with most elements is a chemical property.

Hydrogen is the least dense of all elements is a physical property.

Answer:

Nothing

Explanation:

The radius of the orbit of the Earth does not depend on the radius of the sun.

In fact, the gravitational attraction between the Earth and the Sun provides the centripetal force that keeps the Earth in orbit:

[tex]G\frac{Mm}{r^2} = m\frac{v^2}{r}[/tex]

where

G is the gravitational constant

M is the mass of the sun

m is the mass of the Earth

r is the radius of the orbit of the Earth

v is the orbital speed of the earth

Re-arranging the equation for r:

[tex]r=\frac{GM}{v^2}[/tex]

Also,

[tex]v=\omega r[/tex]

where [tex]\omega[/tex] is the angular velocity of the Earth's orbit. So we can rewrite the equation as

[tex]r=\frac{GM}{\omega^2 r^2}\\r^3 = \frac{GM}{\omega^2}[/tex]

As we see, the radius of the orbit of the Earth, r, does not depend on the mass of the Sun, so if the sun shrank in size, the orbit remains the same.

Final answer:

The Earth's orbit would remain unchanged if the Sun's size decreased but its mass remained the same since gravitational force depends on mass, not size. The orbital period would also be unchanged if the Sun turned into a black hole with the same mass. However, if the Sun shrank to a certain point, it would become a black hole.

Explanation:

If the Sun shrank in size while its mass remained the same, the Earth's orbit would not change. This is because the gravitational force between two objects depends on their masses and the distance between them, not their sizes. According to Newton's law of universal gravitation, the force is directly proportional to the product of the masses and inversely proportional to the square of the distance between their centers. Therefore, as long as the mass of the Sun and the distance between the Earth and the Sun remains constant, the gravitational force and thus the orbit would remain unaffected.

If the Sun were to collapse into a black hole of the same mass, the Earth's orbital period would remain the same. That's because the Earth's orbit depends on the mass of the Sun, as described by Kepler's third law, which relates the period of an orbit to the distance from the focus (in this case, the Sun or black hole) and the mass of the object being orbited.

However, if the Sun collapsed beyond a particular point, general relativity tells us that the curvature of spacetime would get larger. If it shrank to a diameter of about 6 kilometers, it would become a black hole, and only light beams sent out perpendicular to the surface would escape. Even a slight further shrinkage would trap all light, rendering the Sun a black hole.

Answer:2,600 m/s

Explanation:13/ 0.005=2,600.

ANSWER:

The velocity of the wavelength is [tex]2600 \mathrm{m} / \mathrm{s}[/tex]

Explanation:

Given:

The wavelength of the wave= 13 meters

Time period of the wave=0.005seconds

To find:

velocity of the wave=?

Solution:

The velocity of the wave is defined as the product of frequency and wavelength.

Mathematically,

[tex]v=f \lambda[/tex]

Where f is the frequency and λis the wavelength of the wave.

Finding the frequency using time period,

[tex]f=\frac{1}{T}[/tex]

Substituting the  value of time period we have,

[tex]f=\frac{1}{0.005}[/tex]

[tex]f=200 \mathrm{Hz}[/tex]

Now,

[tex]v=f \lambda[/tex]

[tex]v=200 \times 13[/tex]

[tex]v=2600 \mathrm{m} / \mathrm{s}[/tex]

Result:

The velocity of the wave with wavelength 13 meters and time period 0.005seconds is [tex]2600 \mathrm{m} / \mathrm{s}[/tex].

The photoelectric effect consists of the emission of electrons (electric current) that occurs when light falls on a metal surface under certain conditions.

If the light is a stream of photons and each of them has energy, this energy is able to pull an electron out of the crystalline lattice of the metal and communicate, in addition, a kinetic energy.

This is what Einstein proposed:  

Light behaves like a stream of particles called photons with an energy

[tex]E=h.f[/tex]  (1)

So, the energy [tex]E[/tex] of the incident photon must be equal to the sum of the Work function [tex]\Phi[/tex] of the metal and the kinetic energy [tex]K[/tex] of the photoelectron:

[tex]E=\Phi+K[/tex]  (2)

Where [tex]\Phi[/tex] is the minimum amount of energy required to induce the photoemission of electrons from the surface of a metal, and its value depends on the metal.

In the case of Copper [tex]\Phi=4.7eV[/tex]

Now, applying equation (2) in this problem:

[tex]E=4.7eV+1.10eV[/tex]  (3)

[tex]E=5.8eV[/tex]  (4)

Now, substituting (1) in (4):

[tex]h.f=5.8eV[/tex]  (5)

Where:

[tex]h=4.136(10)^{-15}eV.s[/tex] is the Planck constant  

[tex]f[/tex] is the frequency  

Now, the frequency has an inverse relation with the wavelength [tex]\lambda[/tex]:  

[tex]f=\frac{c}{\lambda}[/tex] (6)  

Where [tex]c=3(10)^{8}m/s[/tex] is the speed of light in vacuum  

Substituting (6) in (5):

[tex]\frac{hc}{\lambda}=5.8eV[/tex]   (7)

Then finding [tex]\lambda[/tex]:  

[tex]\lambda=\frac{hc}{5.8eV } [/tex]   (8)

[tex]\lambda=\frac{(4.136(10)^{-15} eV.s)(3(10)^{8}m/s)}{5.8eV }[/tex]    

We finally obtain the wavelength:

[tex]\lambda=213^{-9}m=213nm[/tex]    

Answer:

B they are all radio waves with frequencies lower than visible light

Explanation:

The electromagnetic spectrum classifies all the electromagnetic waves according to their frequency. In order from highest to lowest frequency, we have:

Gamma rays

X-rays

Ultraviolet

Visible light

Infrared

Microwaves

Radio waves

In particular, radio waves are the electromagnetic waves with lowest frequency (and longest wavelength), usually less than 300 GHz ([tex]300\cdot 10^9 Hz[/tex]).

Microwaves radar, radio waves and television waves are all examples of radio waves, which have frequencies lower than visible light. Radio waves are generally used for long-range communications, because given their long wavelength they are able to "bypass" huge obstacles like mountains or building, without being absorbed.

Answer:

B they are all radio waves with frequencies lower than visible light

Explanation:

Answer:

Multiple choice answer would be "None"

Explanation:

White dwarfs are radiating stored heat from earlier reactions.  

Technically, it would be the last fusion stage the star went through  

BEFORE it became a white dwarf, but that's nit-picking.

The energy source of a white dwarf is not a nuclear reaction in the traditional sense, but rather it is supported by a process called electron degeneracy pressure.

A white dwarf is the remnant of a low to medium-mass star (up to about 1.4 times the mass of the Sun) after it has exhausted its nuclear fuel. The core of the star collapses under gravity, and the electrons in the core become packed extremely closely together due to the Pauli exclusion principle, which states that no two electrons can occupy the same quantum state simultaneously.

This electron degeneracy pressure provides the counterforce to gravity, preventing further collapse. No nuclear reactions are occurring in a white dwarf as it no longer has the high temperatures and pressures required for nuclear fusion. Instead, it is a stellar remnant that is gradually cooling over time.

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See the attached picture:

Answer:

Explanation:

There are 12 gtts in 1 mL, and 60 minutes in 1 hr.

250 mL/hr * (12 gtts / mL) * (1 hr / 60 min) = 50 gtts/min

167 mL/hr * (12 gtts / mL) * (1 hr / 60 min) = 33.4 gtts/min

125 mL/hr * (12 gtts / mL) * (1 hr / 60 min) = 25 gtts/min

75 mL/hr * (12 gtts / mL) * (1 hr / 60 min) = 15 gtts/min

1000 mL/hr * (12 gtts / mL) * (1 hr / 60 min) = 200 gtts/min

500 mL/hr * (12 gtts / mL) * (1 hr / 60 min) = 100 gtts/min

(a) 34.6 Hz

The fundamental frequency of a pipe closed at one end is given by

[tex]f_1 = \frac{v}{4 L}[/tex]

where

v = 343 m/s is the speed of the sound in air

L is the length of the pipe

In this problem,

L = 248 cm = 2.48 m

So, the fundamental frequency is

[tex]f_1 = \frac{343 m/s}{4 (2.48 m)}=34.6 Hz[/tex]

(b) 103.8 Hz

In a open-closed pipe, only odd harmonics are produced; therefore, the frequency of the first overtone (second harmonic) is given by:

[tex]f_2 = 3 f_1[/tex]

where

[tex]f_1 = 34.6 Hz[/tex] is the fundamental frequency.

Substituting into the equation,

[tex]f_2 = 3 (34.6 Hz)=103.8 Hz[/tex]

(c) 173 Hz

The frequency of the second overtone (third harmonic) is given by:

[tex]f_3 = 5 f_1[/tex]

where

[tex]f_1 = 34.6 Hz[/tex] is the fundamental frequency.

Substituting into the equation,

[tex]f_3 = 5 (34.6 Hz)=173 Hz[/tex]

(d) 242.2 Hz

The frequency of the third overtone (fourth harmonic) is given by:

[tex]f_4 = 7 f_1[/tex]

where

[tex]f_1 = 34.6 Hz[/tex] is the fundamental frequency.

Substituting into the equation,

[tex]f_4 = 7 (34.6 Hz)=242.2 Hz[/tex]

(e) 69.2 Hz

The fundamental frequency of a pipe open at both ends is given by

[tex]f_1 = \frac{v}{2 L}[/tex]

where

v = 343 m/s is the speed of the sound in air

L is the length of the pipe

In this problem,

L = 248 cm = 2.48 m

So, the fundamental frequency is

[tex]f_1 = \frac{343 m/s}{2 (2.48 m)}=69.2 Hz[/tex]

(f) 138.4 Hz

In a open-open pipe, both odd and even harmonics are produced; therefore, the frequency of the first overtone (second harmonic) is given by:

[tex]f_2 = 2 f_1[/tex]

where

[tex]f_1 = 69.2 Hz[/tex] is the fundamental frequency.

Substituting into the equation,

[tex]f_2 = 2 (69.2 Hz)=138.4 Hz[/tex]

(g) 207.6 Hz

The frequency of the second overtone (third harmonic) in an open-open pipe is given by:

[tex]f_3 = 3 f_1[/tex]

where

[tex]f_1 = 69.2 Hz[/tex] is the fundamental frequency.

Substituting into the equation,

[tex]f_3 = 3 (69.2 Hz)=207.6 Hz[/tex]

(h) 276.8 Hz

The frequency of the third overtone (fourth harmonic) in an open-open pipe is given by:

[tex]f_4 = 4 f_1[/tex]

where

[tex]f_1 = 69.2 Hz[/tex] is the fundamental frequency.

Substituting into the equation,

[tex]f_4 = 4 (69.2 Hz)=276.8 Hz[/tex]

The energy [tex]E[/tex] of a photon is given by the following formula:

[tex]E=h.f[/tex] (1)

Where:

[tex]h=4.136(10)^{-15}eV.s[/tex] is the Planck constant

[tex]f[/tex] is the frequency

Now, the frequency has an inverse relation with the wavelength [tex]\lambda[/tex]:

[tex]f=\frac{c}{\lambda}[/tex] (2)

Where [tex]c=3(10)^{8}m/s[/tex] is the speed of light in vacuum

Substituting (2) in (1):

[tex]E=\frac{hc}{\lambda}[/tex] (3)

Knowing this, let's begin with the answers:

For [tex]\lambda=50cm=0.5m[/tex]

[tex]E=\frac{(4.136(10)^{-15} eV.s)(3(10)^{8}m/s)}{0.5m}[/tex]  

[tex]E=\frac{1.24(10)^{-6}eV.m }{0.5m}[/tex]  

[tex]E=2.48(10)^{-6}eV[/tex]  

For [tex]\lambda=500nm=500(10)^{-9}m[/tex]

[tex]E=\frac{(4.136(10)^{-15} eV.s)(3(10)^{8}m/s)}{500(10)^{-9}m}[/tex]  

[tex]E=\frac{1.24(10)^{-6}eV.m }{500(10)^{-9}m}[/tex]  

[tex]E=2.48 eV[/tex]  

For [tex]\lambda=0.5nm=0.5(10)^{-9}m[/tex]

[tex]E=\frac{(4.136(10)^{-15} eV.s)(3(10)^{8}m/s)}{0.5(10)^{-9}m}[/tex]  

[tex]E=\frac{1.24(10)^{-6}eV.m }{0.5(10)^{-9}m}[/tex]  

[tex]E=2480 eV[/tex]  

As we can see, as the wavelength decreases, the energy increases.

Answer:

The answer to your question is Alpha particles.

Explanation: An electron released by a radioactive nucleus that causes a neutron to change into a proton is called a beta particle.

Final answer:

The question refers to alpha particles, which consist of two protons and two neutrons and are symbolized by He or the Greek letter α. Alpha particles carry a positive charge and result in the atomic number decreasing by two and the mass number by four following emission.

Explanation:

The positively-charged particles emitted by radioactive materials that consist of two protons and two neutrons are known as alpha particles. These particles are the equivalent of a helium nucleus and carry a positive charge due to the protons. The atomic symbol for an alpha particle is either He or the Greek letter α, and this type of radioactive emission results in the reduction of the atomic number by two and the mass number by four. For example, when uranium-238 undergoes alpha decay, it emits an alpha particle and transforms into thorium-234.

In contrast, beta particles are electrons with a 1- charge and are represented as e or β. The emission of a beta particle results in the conversion of a neutron to a proton within the nucleus, increasing the atomic number by one without changing the mass number. Gamma rays, on the other hand, are high-energy electromagnetic radiation with no mass and hence are not particles. Lastly, positron particles are positively charged electrons (anti-electrons) and have negligible mass.

Answer:

A 1.0 min

Explanation:

The half-life of a radioisotope is defined as the time it takes for the mass of the isotope to halve compared to the initial value.

From the graph in the problem, we see that the initial mass of the isotope at time t=0 is

[tex]m_0 = 50.0 g[/tex]

The half-life of the isotope is the time it takes for half the mass of the sample to decay, so it is the time t at which the mass will be halved:

[tex]m'=\frac{50.0 g}{2}=25.0 g[/tex]

We see that this occurs at t = 1.0 min, so the half-life of the isotope is exactly 1.0 min.

Answer:a

Explanation:test

Answer:inner core?

Explanation:

Answer: your answer would be inner core hope it helps

Explanation:

tell me i am wrong?

Explanation:

that don't look bright