need it asap
The reaction 34S( p,n ) 34 Cl has a threshold proton
laboratory energy of 6.45 MeV. Calculate nonrelativistically the
upper limit of the positron energy in the beta decay of 34Ck, given
Answers
The required upper limit of the positron energy in the beta decay of 34Ck is approximately 0.511 MeV.
The given reaction is:
34S(p,n)34Cl.
The threshold proton laboratory energy = 6.45 MeV. We are supposed to calculate non-relativistically the upper limit of the positron energy in the beta decay of 34Ck.
Let us first write down the beta decay reaction of 34Ck: 34Cl(k+) → 34Ar + e+ + v34Cl has a mass number of 34.
Thus, the mass number of 34Ar is 34 - (-1) = 35
Using mass defect formula, mass defect = (mass of the nucleus - mass of individual nucleons)
Therefore, mass defect of 34Ar = (34.974428 - 34*1.008665) u = 0.891 u1 u = 1.660539 x 10-27 kg0.891 u = 1.47918 x 10-27 kg
Total rest mass of the particles = (34.974428 - 34*1.008665 - 2*0) u = 32.958098 u = 5.4933 x 10-26 kg
Total mass of the particles after the decay: 34Cl + e+ + v
Total mass after decay = (33.980270 - 0.000548 + 0) u = 33.979722 u = 5.6593 x 10-26 kg
Using conservation of mass and energy, we can say that total mass before decay ,
= total mass after decay + kinetic energy
K.E. = Total rest mass of the particles before decay - Total rest mass of the particles after decay
= 5.4933 x 10-26 kg - 5.6593 x 10-26 kg = -0.166 x 10-26 kg
K.E. of beta particle = K.E. of neutrino = K.E. of antineutrino (Conservation of momentum in the decay process)
The kinetic energy of the positron is the upper limit of the energy of the positron.
Therefore, the kinetic energy of the positron is = 0.083 x 10-26 kg= 0.083 u0.083 u = 0.138 eV/c² (rest energy of positron)
Therefore, the upper limit of the positron energy in the beta decay of 34Ck = Rest energy of the positron + kinetic energy of the positron= 0.511 MeV + 0.138 eV/c²= 0.511 MeV + (0.138 x 1.6022 x 10-19 J)= 0.511 MeV + 2.2107 x 10-20 J≈ 0.511 MeV (As, 2.2107 x 10-20 J << 0.511 MeV)
Hence, the required upper limit of the positron energy in the beta decay of 34Ck is approximately 0.511 MeV.
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Related Questions
Convert the SI unit:
1000 meters equal to
how many km.
Answers
Answer:
1000m=1km
simple :) . . .
how did the ancients know the planets were different from the stars? choose one: a. they saw that the planets move with respect to the stars over the course of many nights. b. the planets have a larger angular size in our sky than the stars. c. they observed moons orbiting around the planets. d. they noticed that the planets orbit the sun, while the stars do not.
Answers
The correct answer is option d. The ancients realized that stars did not revolve around the Sun like the planets do, and thus arrived at this conclusion.
One of the ways the ancients knew the planets were different from the stars was by observing their motion in the night sky. Unlike stars, which appear stationary in the sky, the planets were observed to move along a regular path relative to the stars. This movement was known as planetary retrograde and could be observed over the course of many nights.
The ancients also noticed that the planets have a larger angular size in our sky than the stars. This made them more easily distinguishable and allowed them to be distinguished from the stars.
Finally, the ancients noticed that some of the planets had moons orbiting them, which none of the stars did. This was a key factor in distinguishing the planets from the stars.
All in all, the ancients knew the planets were different from the stars by observing their movement in the night sky, noticing the angular sizes, and observing the moons orbiting some of the planets. By understanding these phenomena, the ancients were able to catalog the heavenly bodies and give them each a name.
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Types of Waves
A transverse wave has the displacement _____________________________ to the direction of wave propagation. Give an example of this type of wave:
A longitudinal (AKA _____________________________ or __________________________) wave has the displacement _______________________________ to the direction of wave propagation. Give an example of this type of wave:
Answers
transverse : light
longitudinal : sound
transverse : up & down
longitudinal : left & right or side to side
transverse : perpendicular
longitudinal : parallel
transverse : up & down ocean wave
longitudinal : archer pulling back on a bowstring then letting go releasing the string
v = λf : speed of a wave is measured in meters per second (m/s), the wavelength is measured in meters (m), and the frequency is measured in hertz (Hz)
ANSWER:
A transverse wave has the displacement perpendicular (i.e., at right angles) to the direction of wave propagation. An example of a transverse wave is the wave on a string, where the displacement of the string is perpendicular to the direction in which the wave travels.
A longitudinal wave (also known as a compression wave or pressure wave) has the displacement parallel to the direction of wave propagation. An example of a longitudinal wave is sound waves, where the particles of the medium vibrate parallel to the direction of the wave as the wave travels through the medium.
chatgpt
Transverse waves:
The displacement of the wave is perpendicular to the direction of wave propagation.
Example: A wave on a string, where the string moves up and down while the wave moves left and right.
Simple analogy: Imagine shaking a jump rope up and down while holding it horizontally - the wave travels horizontally while the rope moves up and down.
Longitudinal waves:
The displacement of the wave is parallel to the direction of wave propagation.
Example: Sound waves, where air molecules move back and forth in the same direction as the wave.
Simple analogy: Imagine squeezing a slinky in a direction parallel to the slinky - the wave travels in that same direction while the slinky compresses and expands.
Formula used: There is no specific formula for describing the direction of wave displacement, as it depends on the type of wave. However, the speed of a wave can be calculated using the formula v = λf, where v is the speed of the wave, λ (lambda) is the wavelength, and f is the frequency.
Real-world example: Light waves are transverse waves, with the electric and magnetic fields perpendicular to the direction of propagation. This can be seen in polarization filters, which only allow light waves with a certain orientation of electric field to pass through.
Real-world example of longitudinal waves
An example of longitudinal waves in the real world is sound waves, which are pressure waves that propagate through a medium such as air, water, or solids. Sound waves are longitudinal waves because the vibrations of air molecules or particles in a medium are parallel to the direction of the wave's propagation. Examples of sound waves in daily life include the sound of a car engine, a musical instrument, or a person speaking.
ChatGPT atGPT
byjus
A flat sheet of paper is dropped from the top of a building. Assume the force exerted on the paper by the Earth is the same strength as the force from the drag interaction. The paper
a. slows down.
b. speeds up.
c. starts slowing to a stop.
d. moves at a constant speed
Answers
Based on the information given in the question above, the flat sheet of paper would move at a constant speed. Therefore, the correct answer is option D.
In the question above, a flat sheet of paper is dropped from a certain height. Then, the question asked us to assume that the force exerted on the paper by Earth (downward gravitational force) is the same strength as the force from the air drag (upward drag force).
Since both working forces are the same, that means the amount of force applied to the paper is balanced. A balanced force makes the sheet of paper moves at a constant speed toward the ground.
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A baseball player throws a 0.5 kg baseball to a teammate. When the ball reaches a height of 15 m and has a velocity of 40 m/s, what is the total mechanical energy of the ball?
A.83.5 J
B.300 J
C.473.5 J
D.2,940 J
Answers
The total mechanical energy of the ball is 473.5 J. Hence, option (C) is correct.
What is energy?The ability to perform tasks is referred to as energy. Joules (J) is the SI unit for energy . Energy is a scalar quantity.
Given that: A baseball player throws a 0.5 kg baseball to a teammate. When the ball reaches a height of 15 m and has a velocity of 40 m/s.
Hence, the total mechanical energy of the ball is =
Kinetic energy + potential energy
= mv^2/2 + mgh
= 0.5×40^2/2 J + 0.5×9.8×15 J
= 473.5 J.
So, the mechanical energy of the baseball is 473.5 J.
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0.750kg ball is dropped on to a spring. if the ball is traveling at 5.00m/s, how much does the spring compress bringing the ball to a stop? the spring constant is 650.n/m
Answers
The spring compresses by nearly 0.170 meters when the ball comes to a stop.
In the given question, the idea of mechanical energy conservation can be applied to calculate the spring's compression when the ball comes to a stop. The compressed spring stores the original kinetic energy of the ball as potential energy.
Calculating the initial kinetic energy of the ball -
\(KE = 0.5 * m * v^2\)
\(= 0.5 * 0.750 kg * (5.00 m/s)^2\)
= 9.375 J
Calculating the potential energy stored in the spring -
\(PE = 0.5 * k * x^2\)
\(9.375 J = 0.5 * 650 N/m * x^2\)
\(18.75 J = 650 N/m * x^2\)
\(x^2 = 18.75 J / (650 N/m)\)
\(x^2 = 0.0288 m^2\)
\(x = \sqrt(0.0288 m^2)\)
= 0.170 m
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What is a car’s acceleration if it increases its speed from 5 m/s to 20 m/s in 3 s? 10 m/s2 –15 m/s2 15 m/s2 5 m/s2
Answers
Answer:
5 m/s²
Explanation:
Acceleration = change in speed/time taken
20-5=15
15/3= 5 m/s²
Defects of vision and their correction drawing
No Spams ❌❌
Answers
Answer:
Vision Correction
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Explanation:
hope this helps
About Jupiter's winds at different heights, which ones of the following statements is not correct?A. The Galileo Probe conducted wind measurements at different heights on JupiterB. The measurements from the Galileo Probe suggest that winds never change in the vertical direction on JupiterC. Tracking clouds at different heights can provide the information about the vertical structure of winds on JupiterD. Thermal wind equation can help us to explore the vertical structure of winds on Jupiter
Answers
About Jupiter's winds at different heights, the following statements is not correct is option b) The measurements from the Galileo Probe suggest that winds never change in the vertical direction on Jupiter.
The Galileo Probe, which descended into Jupiter's atmosphere in 1995, did conduct wind measurements at different heights on Jupiter (Option A). It provided valuable data on the composition, temperature, and winds of the Jovian atmosphere.
Tracking clouds at different heights can indeed provide information about the vertical structure of winds on Jupiter (Option C). By observing cloud movements and their patterns at various altitudes, scientists can infer the dynamics and circulation of the planet's atmosphere.
The thermal wind equation, which relates the horizontal temperature gradient to the vertical wind shear, is a useful tool for studying the vertical structure of winds on Jupiter (Option D). It helps scientists understand how temperature variations influence the atmospheric circulation and wind patterns.
However, the notion that winds never change in the vertical direction on Jupiter is incorrect. Jupiter's atmosphere is known for its complex and dynamic weather patterns, including powerful jet streams and storms.
The Galileo Probe's measurements and subsequent observations from Earth-based telescopes and other spacecraft have revealed vertical variations in wind speeds and directions, indicating the presence of vertical wind shear and atmospheric disturbances.The correct answer is option b.
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What is the kinetic energy of a 150 kg object that is moving at a speed of 5
m/s?
Answers
Answer:
Kinetic Energy=1/2×m×v^2,Where m=mass,v=velocity. So, kinetic energy of the object=1/2×150×15^2 = 16875 kg m^2 s^-2 .
Explanation:
math lol
Consider a box resting on a horizontal surface. The box has a mass of 2.13 kg and the coefficient of static friction between the box and the surface is 0.151. Determine the force that must be applied down at a 37.8º angle to the horizontal to make the box start moving.
Answers
The force that must be applied down at an angle of 37.8° to the horizontal to make the box start moving is 3.99 N.
What is force?Force is obtained by multiplying the mass of a body by its acceleration.
To calculate the force that must be applied to make the box start moving, we use the formula below.
Formula:
F = mgμ/cos∅......... Equation 1Where:
F = Force applied to the boxm = Mass of the boxg = Acceleration due to gravityμ = Cofficient of static friction∅ = AngleFrom the question,
Given:
m = 2.13 kgg = 9.8 m/sμ = 0.151∅ = 37.8°Substitute these values into equation 1
F = (2.13×9.8×0.151)/(cos37.8°)F = 3.99 NHence, the force that must be applied to the box is 3.99 N.
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Describe how an oscilloscope should be used to measure the frequency of the sound wave from the sonometer
Answers
Answer:
T = reading (cm) time base (s / cm)
f = 1 / T
Explanation:
An oscilloscope is a piece of equipment that allows you to visualize and measure a wave that reaches you, in the case of having a sonometer this transforms the sound wave into an electrical signal to be introduced through one of the voltage channels of the equipment, on the screen we will see the oscillating alternating signal, if it is fixed we can make the reading, if it is moving the time base and the trigger must be adjusted to stop it.
In the oscilloscope we can read the period of the signal, this is the time it takes for the signal to repeat itself with this value, we can calculate the frequency with the formula, for the reading of the period the distance is measured on the labeled screen and multiplied by the time base
T = reading (cm) time base (s / cm)
f = 1 / T
Claim how it would be possible to predict the speed that a 2000 kg car full with riders will reach before it’s ever placed on the track. Cite evidence by using the appropriate formulas and reasoning by solving them in order to calculate the speed of the car at the bottom of the first hill
Answers
We can predict that the car full of riders will reach a speed of 28.0 m/s at the bottom of the first hill based on the principles of conservation of energy.
It is possible to predict the speed that a 2000 kg car full with riders will reach before it's ever placed on the track using the principles of conservation of energy. According to the law of conservation of energy, the total energy in a system remains constant, and it can be converted from one form to another.
To calculate the speed of the car at the bottom of the first hill, we can use the conservation of energy equation, which states that the initial potential energy (PEi) of the car is equal to the final kinetic energy (KEf) of the car.
PEi = KEf
\(mgh = 1/2mv^2\)
Where m is the mass of the car, g is the acceleration due to gravity, h is the height of the hill, and v is the velocity of the car.
Solving for v, we get:
\(v = \sqrt{(2gh)}\)
Using the given values of m = 2000 kg, h = 40 meters, and g = 9.81 m/s², we can calculate the velocity of the car at the bottom of the first hill:
\(v = \sqrt{(2gh)} = \sqrt{(2 \times 9.81 \;m/s^2 \times 40 m)} = 28.0 m/s\)
Therefore, we can predict that the car full of riders will reach a speed of 28.0 m/s at the bottom of the first hill based on the principles of conservation of energy.
In summary, by using the conservation of energy equation, we can predict the speed of the car at the bottom of the first hill based on its mass and the height of the hill. We found that the car full of riders will reach a speed of 28.0 m/s using this method.
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why does changing the volume of something like flattening a ball of aluminum foil into the shape of a bolt change its density
Answers
Changing the volume of something like flattening a ball of aluminum foil into the shape of a boat change its density because has a smaller volume compared to its mass.
As folded piece of aluminum is closer to that of a solid piece of aluminum, therefore It has a smaller volume compared to its mass. As it is folded, atoms of aluminum are forced to be compacted together. Hence, it's density is higher and greater than 1.
Objects react quite differently in water because of their density. Aluminum foil ball has more density because its pennies are crowded into a smaller space than in the foil boat. The foil boat has lesser density because it is spread out and filled with air.
Density is used to measure how heavy something is as compared to its size. If an object has density more than water then it will sink when placed in water and if density is less than water then it will float. Density is that property of a substance that doesn't depend on the amount.
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Currently, the world population is about:
A. 7 billion
B. 450 million
C. 1.2 trillion
D. 700 million
Answers
2. CaCl2 (s) + 2H20 ---> Ca(OH)2 (aq) + 2HCl (g) + heat
Is it an endothermic reaction?
Answers
Answer:
no
Explanation:
Calcium chloride is a chemical compound made up of calcium ions and chlorine ions. ... Mixing calcium chloride with water is an exothermic reaction, which means that the combination of the two substances releases heat. Thus, when you add calcium chloride to water, the solution heats.
You wish to date a hip bone fragment you found at a cave site.
You find a ratio of 1 14C atoms for every 31 14N atoms. How many
half- lives have elapsed?
Answers
To determine the number of half-lives that have elapsed, we need to compare the ratio of 14C to 14N atoms found in the hip bone fragment.
The ratio of 1 14C atom for every 31 14N atoms suggests that the hip bone fragment contains a smaller amount of 14C compared to the expected ratio found in a living organism. Since 14C undergoes radioactive decay with a half-life of approximately 5730 years, we can calculate the number of half-lives that have elapsed by observing how many times the ratio needs to double to reach the expected ratio.
In this case, if the expected ratio is 1:1, then the observed ratio of 1:31 would require five doublings to reach 1:1. Therefore, approximately five half-lives have elapsed since the death of the organism from which the hip bone fragment originated.
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Two freckles are 0. 00325m apart when looking at them through a camera lens eye dimeter=0. 433
Answers
The maximum distance at which the two freckles could be resolved is 0.00822 m.
The maximum distance at which two freckles can be resolved is given by the Rayleigh criterion, which states that two objects are just resolved when the first diffraction minimum of one image coincides with the central maximum of the other. The equation for this is:
\(L = (1.22λD)/d\)
Where L is the maximum distance, λ is the wavelength of light, D is the diameter of the lens, and d is the distance between the two freckles.
Plugging in the given values:
\(L = (1.22)(525 x 10^-9 m)(0.0433 m)/(0.00325 m)\)
\(L = 8.22 x 10^-6 m\)
\(L = 0.00822 m\)
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Newton's Second Law says that the force applied to an object is equal to the mass of the object times its acceleration. In other words, F=ma. Use a rearranged version, a=F/m in order to calculate the acceleration of a 5 kg skateboard when you give it a push of 20 N. PLEASE HELP FAST!!
Answers
Here the force is 20 N and mass is 5 kg
acc= Force/mass
acc=20/5= 4m/s²
Mice eat insects and get eaten by owls. In which case would a population of mice increase?
drought keeps grass from growing.
More mice die than are born.
The owl population increases.
The populations of insects increases.
Answers
A measure of the pull of gravity on an object.
Group of answer choices
Mass
Height
Weight
Gravitational Potential Energy
Answers
Answer:
weight.................
A wave traveling at 56 m/s has a wavelength of 8 meters. Determine the frequency (in Hz) of this wave. You must include the equation you used
can someone please help me on this question, thank you!
Answers
At a particular temperature, the speed of sound is 330 m/s and its frequency is 990 Hz. Choose the correct wavelength of this sound wave.
m
Answers
Answer:
1/3 M
I hope this helps :) sorry its late
Answer:
1/3 m
Explanation:
What is the angular momentum of a hydrogen atom in a 4p state? Give your answer as a multiple of ℏ. Express your answer as a multiple of ℏ using three significant figures. L = nothing ℏ Request Answer Part B What is the angular momentum of a hydrogen atom in a 5f state? Give you answer as a multiple of ℏ.
Answers
The angular momentum of hydrogen atom in a 4p state is √2 ℏ.
The angular momentum of an atom is given by,
L = ℏ [√l(1 + l)]
where ℏ is the reduced Plank's constant and l is the orbital quantum number.
1) In 4p state, the value of l is 1.
Therefore, the angular momentum of hydrogen atom in a 4p state,
L = ℏ [√1(1 + 1)]
L = √2 ℏ
2) In 5f state, the value of l is 3.
Therefore, the angular momentum of hydrogen atom in a 5f state,
L = ℏ [√3(1 + 3)]
L = 2√3 ℏ
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A body weights 50 N in air and 45 N when wholly immersed in water calculate (i) the loss in weight of the body in water (ii) the upthrust on the body. (iii) volume of the body.
Answers
Answer:
\(difference \: in \: weight = 150n - 100n = 50n\)
Now,buyantant force
\(difference \: in \: weight \: = volume(body) \times density \: of \: water \: \times g\)
so;
\(50 = {v}^{b} \times 1 \times {10}^{3} \times 9.8m {s}^{2}\)
\( {v}^{b} = \frac{50}{1000 } \times 9.8\)
\( = \frac{50}{9800} \)
\( = 0.0051\)
Now,
\(mass \: in \: air \: = 150n = \frac{150}{9.8kg} \)
\(density = \frac{weght}{volume} \)
\( = \frac{150}{0.0051} \times 9.8 \\ x = 3000\)
And now,
\(specific \: density \: = \frac{density of \: the \: body}{density \: of \: water} \)
\( = \frac{3000}{1000} \)
\( = 3\)
Hence that,specific density of a given body is 3
please mark me as brainliest, please
2. Speed limits on curves help to reduce the effect of ........force on a vehicle
A. enertia
b. centrifugal
c. gravity
Answers
Answer:
enertia
Explanation:
enertia
The correct answer is (B) Centrifugal Force
The centrifugal force on a vehicle on the curves is outwards or can say away from the curve and pulls the out of the track.
the centrifugal force is given by \(F=\frac{mv^{2} }{r}\), which is directly proportional to speed v.
Speed limits on the curves help in reducing the centrifugal force by reducing the speed.
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collision actually have taken place as
60. In reviewing her lab book, a physics student finds the
following description of a collision: "A 4-kg air-hockey
puck with an initial speed of 6 m/s to the right collided
head-on with a 1-kg puck moving to the left at the same
speed. After the collision, both pucks traveled to the
right, the 4-kg puck at 2 m/s and the 1-kg puck at 10
m/s." Is momentum conserved in this description? Is
kinetic energy conserved in this description? Could this
collision actually have taken place as described?
Answers
The momentum is conserved in the case of this particular collision.
What is the conservation of linear momentum?The conservation of linear momentum is a fundamental principle in physics which states that in the absence of any external forces, the total momentum of a system of objects remains constant. In other words, if a system of objects interacts with each other, the total momentum before the interaction is equal to the total momentum after the interaction.
Mathematically, the principle of conservation of linear momentum can be expressed as:
Σp_before = Σp_after
We know that;
Momentum before collision = ( 4 * 6) - ( 1 * 6) = 24 - 6 = 18 Kg m/s
Momentum after collision = ( 4 * 2) + (1 * 10) = 8 + 10 = 18 Kgm/s
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what is the energy of s microwave photon with a wavelength of 1.293mm (0.001293 m)?
Answers
The energy of a microwave photon with a wavelength of 1.293 mm (0.001293 m) is 1.530 x 10⁻²⁴ J. The energy of a microwave photon with a wavelength of 1.293 mm (0.001293 m) can be calculated using the equation: E= hc/λ .
Where :E = Energy , h = Planck's constant = 6.626 x 10⁻³⁴ J s (joule-seconds, )c = speed of light = 3 x 10⁸ m/s (meters per second), λ = wavelength= 1.293 mm (0.001293 m)
The steps to solve the problem are as follows:
1. Convert the wavelength from mm to m0.001293 m = 1.293 x 10⁻³ m
2. Plug the values into the equation: E = (6.626 x 10⁻³⁴ J s) x (3 x 10⁸ m/s) / (1.293 x 10⁻³ m)
3. Solve for E using a calculator E = 1.530 x 10⁻²⁴ J
Therefore, the energy of a microwave photon with a wavelength of 1.293 mm (0.001293 m) is 1.530 x 10⁻²⁴ J.
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can someone help please and thank you:)
Answers
Answer:
infrared will do but I'm not sure this question is hard if I may say and we cannot take green because it is the colour that the concept must have
A force of 16 N to the west is applied to each object below. Which object will undergo the greatest change in momentum
Answers
A force of 16 N to the west is applied to each object below , the object with greater mass and velocity have greater momentum. So, A 20 Kg object that is moving east at 10m/s.
What is force?
Force is an external agent acting on a body, to change it from the state of rest or motion. There are various kinds of forces such as frictional force, magnetic force, nuclear force etc.
In physics, force is the product of mass and acceleration of the body. Greater mass results greater force needed to be applied on the object to make it move or stop.
Momentum is the product of mass and velocity. Thus, as mass or velocity or both increases, momentum of the object increases. Hence the larger object moving faster will gain greater momentum.
Here, option C is the correct answer.
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