The missing number is 225 and the decay is the beta decay in the given reaction.
What is Beta decay?In nuclear physics, beta decay can be described as a type of radioactive decay in which a beta particle is emitted from an atomic nucleus, transforming the original nuclide. Beta decay of a neutron transforms a nuclide into a proton by the emission of an electron accompanied by an antineutrino.
The two types of beta decay are known. In beta minus (β⁻) decay, a neutron is transformed to a proton, and the process forms an electron and an electron antineutrino; while in beta plus (β⁺) decay, a proton is transformed to a neutron and the process forms a positron and an electron neutrino and β+ decay is called positron emission
\(^{225}Ra_{88} \longrightarrow ^0e_{-1} + ^{225}Ra_{87}\)
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a baseball of mass m and velocity v hits a concrete wall and rebounds with a velocity of -0.5v. what is the impulse delivered to the baseball by the concrete wall?
The impulse delivered to the baseball by the concrete wall is -1.5mv. This negative sign indicates that the impulse is in the opposite direction to the initial velocity of the baseball.
When a baseball hits a concrete wall, it experiences a change in velocity due to the impulse delivered by the wall. Impulse is the product of force and time, and in this case, the force is exerted by the wall on the baseball during the collision.
We can use the law of conservation of momentum to find the impulse delivered to the baseball. Initially, the momentum of the baseball is given by p1 = mv, where m is the mass of the baseball and v is its velocity. After rebounding from the wall, the momentum of the baseball is p2 = m(-0.5v) = -0.5mv.
The change in momentum of the baseball is given by Δp = p2 - p1 = -1.5mv. Therefore, the impulse delivered to the baseball by the wall is equal to the change in momentum, i.e., J = Δp = -1.5mv.
In conclusion, the impulse delivered to the baseball by the concrete wall is -1.5mv. This negative sign indicates that the impulse is in the opposite direction to the initial velocity of the baseball.
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how long does it take a man to travel 6 km if his speed is 3km/h?
why did my answer get deleted??
oh yeah i put a link on there- oopsies.
I wont this time!
I got 30!
1) Identify a source of interest to you. Provide the bibliographic information for the reader.
2) Summarize the source in at least two well developed paragraphs. Identify the main point of the article as well as the evidence advanced in support of it.
3) Significance. Identify the significance of the source—why is it important?—what practical or theoretical consequences might follow from the main point?—what limitations, objections, or weaknesses might be present that could serve to undermine the significance of the source?
4) Explain what you learned about philosophy as a whole; would you recommend that our class address the themes covered in the source? Why or why not?
5) Recommendation: One a scale of 1-5, with five being the highest, rank the quality and importance of this article. Be sure to explain your ranking.
https://aeon.co/essays/natural-laws-cant-be-broken-but-can-they-be-defined
The significance of a source in research is crucial as it determines the reliability and validity of the information presented. A credible source is important because it ensures that the information presented is accurate and trustworthy.
Using sources that are not credible or reliable can lead to the spread of misinformation, which can have practical consequences such as wrong decisions and actions based on incorrect information. Theoretical consequences could include flawed research or faulty arguments. It is important to consider the limitations, objections, or weaknesses of a source, as these can undermine its significance. This includes evaluating factors such as bias, sample size, and methodology used in the research.
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--The complete Question is, Identify the significance of the source—why is it important?—what practical or theoretical consequences might follow from the main point?—what limitations, objections, or weaknesses might be present that could serve to undermine the significance of the source?--
CAN SOMEONE HELP ME PLEASE AND SHOW WORK
Answer:
.3,.29
Explanation:
all you gotta is divide the distance traveled by the velocity which is simply 6.5/22
the answer comes out as .295454...
RE (8
10 ms
1. What is the length of the liquid column in a barometer tube that would support an atmospheric pressure of
10,200 Nm2 if the density of the liquid is 2,600 kgm
A spring that obeys Hooke's Law has an unstretched length of 10 cm. A load of 20 N is hung from the spring. The new length of the spring is 36 cm. What is the spring constant k of the spring? (a) 0.56 N/cm (b) 0.77 N/cm 8/12/2022 Physics (c) 1.3 N/cm (d) 1.8 N/cm (8) marks
A spring that obeys Hooke's Law has an unstretched length of 10 cm. A load of 20 N is hung from the spring. The new length of the spring is 36 cm, then the spring constant k of the spring would be 0.77 N/ cm.
What is the spring constant?The spring constant is used to define the stiffness of the spring, the greater the value of the spring constant stiffer the spring and it is more difficult to stretch the spring.
Relation between force and the spring constant,
F = - Kx
F= 20 N and
x = 36 -10
= 26 cm
K = F/x
=20/26 N/ cm
=0.77 N / cm
Thus, the spring constant for the spring is 0.77 N/ cm, therefore the correct answer is option B.
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Which of the following is measured by the Schwarzschild Radius?
AO The radius of the singularity for a black hole
B. the radius of the event horizon tor a hack hole
C. The radius of the degenerate electron sphere in a white dwart.
DO The radius of the synchrotron beam for a neutron star.
The radius of the event horizon for a black hole is measured by the Schwarzschild Radius.
Hence, the correct option is B.
The Schwarzschild Radius is a characteristic length scale associated with a non-rotating, spherically symmetric black hole.
It represents the radius of the event horizon, which is the boundary beyond which nothing, including light, can escape the gravitational pull of the black hole.
It is denoted by the symbol "rs" and is calculated based on the mass of the black hole. The Schwarzschild Radius determines the size of the event horizon and plays a crucial role in defining the properties of a black hole.
Therefore, The radius of the event horizon for a black hole is measured by the Schwarzschild Radius
Hence, the correct option is B.
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an object rotates with a frequency of 300 Hz. How many revolutions will it make in 15?
The object will complete 4,500 revolutions in 15 seconds, assuming it rotates at a constant frequency of 300 Hz.
The frequency of rotation is given as 300 Hz, which means the object completes 300 revolutions in one second. To calculate the total number of revolutions in 15 seconds, we can multiply the frequency by the time in seconds, giving us 300 x 15 = 4,500 revolutions.
Therefore, the object will complete 4,500 revolutions in 15 seconds if it maintains a constant frequency of 300 Hz.
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User
The magnetic field surrounding a current-carrying wire points radially away from the wire.True or False?First give main ans in the form of 'The given statement ''write whole statememt)''is true of false because (give reason) and then explanation in exact 110 words total
and explanation in exact 110 words total
ChatGPT
The given statement "The magnetic field surrounding a current-carrying wire points radially away from the wire" is false because the magnetic field surrounding a current-carrying wire forms concentric circles around the wire.
Explanation:
Which best explains why trees are considered a renewable resource? O They are useful to humans. O They can be replanted. 0 They provide a source of food. They are used to produce heat.
Answer:
They can be replanted.
Explanation:
Renewable sources can be found again and again, similar to how you can plant a tree again to receive food sources and heat production, which in turn is useful to humans.
When The trees are considered a renewable resource because They can be replanted. The correct option is 'B'.
What is a Renewable Resource?
When Renewable sources can be found, again and again, similar to how you can plant a tree again to receive food sources and also heat production, they are in turn useful to humans.
When the renewable resources are resources, generally naturally happening, they can replenish to the rate that they can return the used volume and also be swallowed.
A renewable resource will either produce itself naturally through automatic approaches to that resource or through human interaction and guidance.
Therefore, The correct option is 'B'.
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What is the relation between the specific heat capacity of a substance with change
in temperature.
Answer: The heat capacity and the specific heat are related by C=cm or c=C/m. The mass m, specific heat c, change in temperature ΔT, and heat added (or subtracted) Q are related by the equation: Q=mcΔT. Values of specific heat are dependent on the properties and phase of a given substance.
Explanation:
an electron traveling north enters a region where the electric field is uniform and points north. the electron:
When an electron traveling north reaches an area with a consistent electric field facing north, the electron's speed and direction of motion are altered.
What is an electron?A negatively charged subatomic particle known as an electron can either be free or attached to an atom. In the electron cloud, which is located outside of the atomic nucleus, exist electrons.
An electric field that is oriented northward will exert a force on an electron moving northward through it. The electron will accelerate in the field's direction as a result of this force. The strength of the electric field and the charge of the electron will determine how much the acceleration is.
The electron will continue to receive a constant force and move in a straight line with a constant acceleration in a uniform electric field since the electric field's direction is constant. As the electron passes through the electric field, both its velocity and kinetic energy will increase.
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a runner taking part in the 200 m dash must run around the end of a track that has a circular arc with a radius of curvature of 30 m. if he completes the 200 m dash in 23.2 s and runs at constant speed throughout the race, what is the magnitude of his centripetal acceleration as he runs the curved portion of the track?
2.47 m/s² is the magnitude of his centripetal acceleration as he runs the curved portion of the track.
What is centripetal acceleration ?The feature of an object's motion when it travels across a circular path is known as centripetal acceleration. Centripetal acceleration refers to the motion of any item in a circular with an accelerating vector that points in the direction of the center of the circle.
Briefing:a = v²/r
v is the velocity of runner
v = 200/23.2
v = 8.62 m/s
Centripetal acceleration,
a = (8.62)²/30
a = 2.47 m/s².
The centripetal acceleration of the runner is 2.47 m/s². Hence, this is the required solution.
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Suppose 435 mL of Ne gas at 21 °C and 1. 09 atm, and 456 mL of SF6 at 25 °C and 0. 89 atm are put into a 325 mL flask at 30. 2 °C (a) What will be the total pressure in the flask? (b) What is the mole fraction of for each of the gases in the flask?
(a) To determine the total pressure in the flask, we need to consider the partial pressures of each gas present and add them together.
Using the ideal gas law, we can calculate the partial pressure of each gas:
PV = nRT
For Ne gas:
P₁V₁ = n₁RT
P₁ = (n₁/V₁)RT
For SF6 gas:
P₂V₂ = n₂RT
P₂ = (n₂/V₂)RT
To find the total pressure, we add the partial pressures:
P_total = P₁ + P₂
(b) The mole fraction (χ) of each gas can be calculated using the formula:
χ = moles of gas / total moles of gas
To find the moles of each gas, we use the ideal gas law rearranged:
n = PV / RT
Now, let's calculate the values.
Given:
Volume of Ne gas (V₁) = 435 mL = 0.435 L
Temperature of Ne gas (T₁) = 21 °C = 294 K
Pressure of Ne gas (P₁) = 1.09 atm
Volume of SF6 gas (V₂) = 456 mL = 0.456 L
Temperature of SF6 gas (T₂) = 25 °C = 298 K
Pressure of SF6 gas (P₂) = 0.89 atm
Volume of flask (V_total) = 325 mL = 0.325 L
Temperature of flask (T_total) = 30.2 °C = 303.2 K
Gas constant (R) = 0.0821 L·atm/(K·mol)
(a) To calculate the total pressure:
P₁ = (n₁/V₁)RT₁
P₁ = (PV₁/RT₁)
P₂ = (n₂/V₂)RT₂
P₂ = (PV₂/RT₂)
P_total = P₁ + P₂
(b) To calculate the mole fraction:
n₁ = P₁V_total / RT_total
n₂ = P₂V_total / RT_total
χ₁ = n₁ / (n₁ + n₂)
χ₂ = n₂ / (n₁ + n₂)
By plugging in the given values and performing the calculations, we can find the total pressure in the flask and the mole fraction of each gas.
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which is a harmful role of bacteria of bacteria?
Answer:
Harmful bacteria are called pathogenic
Explanation:
Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.
Strong x-ray beams can be produced when
A) cathode rays strike a metal anode.
B) gamma rays move through a magnetic field.
C) alpha rays pass through a thin metal foil.
D) beta rays are absorbed by bones
Strong x-ray beams can be produced when cathode rays strike a metal anode.
This process is known as the production of bremsstrahlung radiation. When high-speed electrons, also called cathode rays, are accelerated and then collide with a metal target, they are abruptly decelerated, and the kinetic energy lost is converted into X-ray photons.
The resulting X-ray beam produced can be strong and intense, and its properties depend on the energy of the incident electrons and the material of the target.
Gamma rays moving through a magnetic field, alpha rays passing through a thin metal foil, or beta rays being absorbed by bones do not directly produce strong X-ray beams.
In summary, the correct answer is A) cathode rays striking a metal anode can produce strong X-ray beams.
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a piece of space debris that you pick up from the ground is called
Answer:
meteorite it's on the space when planets are desroy if it made from a rock
Your boss at the Cut-Rate Cuckoo Clock Company asks you whatwould happen to the frequency of the angular SHM of the balancewheel if it had the same density and the same coil spring (thus thesame torsion constant), but all the balance wheel dimensions weremade one-third as great to save material.
a)By what factor would the frequency change?
b)Would the frequency increase or decrease by the factor foundin part (a)?
c)By what factor would the torsion constant need to be changedto make the smaller balance wheel oscillate at the originalfrequency?
d)Would the torsion constant need to be increased or decreasedby the factor found in part (c)?
Answer:
a) the factor between the frequencies is f ’/ f₀ = 9
b) the frequency increases f ’= 9 f₀
c) So that the frequency is equal to the initial one k ’= k₀ / 81
d) the torque constant must decrease
Explanation:
This is a simple harmonic motion, like angular velocity
w = \(\sqrt{\frac{k}{I} }\)
where k is the torsion constant and I the moment of inertia of the flywheel.
Angular velocity and frequency are related
w = 2π f
we substitute
\(f= \frac{1}{2\pi } \sqrt{\frac{k}{I} }\) (1)
We will use the subscript o for the system without change
f = \(\frac{1}{2\pi }\) \(\sqrt{\frac{k}{I_{o} } }\)
In the problem they indicate that the torsion constant remains constant, therefore we must analyze the moment of inertia, in general the flywheels are circular discs,
I = ½ M R²
Let's find the change when reducing the radius r ’= r / 3
Let's use the density
ρ = m ’/ V’
m ’= ρ V’
disk volume is
V = π r² e
suppose that the thickness is small and does not change, substitute
m ’= ρ π\((\frac{r}{3}) ^{2}\) e = 1/9 m
Moment of inertia
I ’= ½ m’ r’²
I ’=\(\frac{1}{2}\) \(\frac{1}{9}\) m (\frac{r}{3}) ^{2} = 1/81 (½ m r²)
I ’= 1/81 Io
we substitute in equation 1
f ’= \(\frac{1}{2\pi }\) \sqrt{\frac{k}{I} }
f ’= \frac{1}{2\pi } \sqrt{\frac{81k}{Io} }
f ’= 9 f₀
Let's analyze the questions
a) the factor between the frequencies is
f ’/ f₀ = 9
b) the frequency increases
f ’= 9 f₀
c) So that the frequency is equal to the initial one
k ’= k₀ / 81
d) the torque constant must decrease
12. Which of the following is accurate when discussing specific heat?
O A. Specific heat values for solids will never vary for different ranges of temperature.
B. Specific heat values for liquids will never vary for different ranges of temperature.
C. The specific heat of a gas can be measured at constant volume only.
D. The specific heat of a gas can be measured at constant pressure.
D. The specific heat of a gas can be measured at constant pressure.
How to determine the accurate statement about specific heatBy definition, the specific heat capacity of a substance is the heat capacity of a sample of the substance divided by its mass, also known as massic heat capacity.
Water has a high specific heat, which means that it takes more energy to raise the temperature of water than other substances.
For gaseous substances, their specific heats can be measured at constant pressure.
Using the above as a guide, we have the following:
The accurate statement about specific heat is (d)
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I need help! PLZZZZZZ
Solar flares produce lethal levels of radiation. What type of warning will astronauts receive before these high-energy particles are hurled at them?
Answer:
Even inside their ships, astronauts are exposed to a slow drizzle of cosmic rays coming right through the hull. The particles penetrate flesh, damaging tissue at the microscopic level. One possible side-effect is broken DNA, which can, over the course of time, cause cancer, cataracts and other maladies.
a water supply pipe of diameter 2.50 cm carries water from the water main to a sprinkler that is at the top of a small hill. the sprinkler nozzle is 0.50 cm in diameter and the water exits the sprinkler nozzle with a speed of 10.0 ms-1 . if the sprinkler is 8.00 m above the supply pipe, find:
The volume of the sprinkler for the given water supply is V1 = 0.32m/s, by using Bernoulli's equation.
What is Bernoulli's equation?According to Bernoulli's principle of fluid dynamics, a fluid's speed increases at the same time as its static pressure or potential energy decreases. The Bernoulli equation is regarded as the definition of energy conservation for flowing fluids. This is thought to be the qualitative behaviour that reduces pressure in high-velocity zones. Also, referred to as the Bernoulli effect.
Calculations:
Using continuity equation, Bernoulli's equation.
A1×V1 = A2×V2
Where,
A1 = area of the supply pipe
V1 = volume of supply pipe
A2 = area of sprinkler
V2 = volume of sprinkler
Given,
Diameter of supply pipe = 2.5cm therefore radius = 1.25cm.
Diameter of sprinkler = 0.5cm therefore radius = 0.25cm.
V1 = (A2×V2) /A1
V1 = (π \(r_{2}\)²× V2) / (π \(r_{1}\)²)
V1 = {π (0.25) ² × 8} / { π (1.25) ²}
V1 = 0.32m/s.
Hence, the volume of the sprinkler for the given water supply is V1 = 0.32m/s, by using Bernoulli's equation.
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Which of the following is a characteristic of a base?
A. pH greater than 7
B. pH between 4 and 13
C. pH between 4 and 9
D. pH less than 7
Answer:
A. pH greater than 7
Explanation:
Because a base has a pH scale of 8 to 14
4. Explain how energy is transformed in a spring.
Answer:
As spring falls in a vertical plane, the change in gravitational potential energy is transformed to elastic potential energy.
Explanation:
To calculate the spring constant, Hooke's law was used, as well as potential energy to calculate the gravitational and elastic potential energy.
A hiker tries to prepare a hard-boiled egg on the high slopes of Mount Everest. The base camp is located 5,300 meters above sea level. The hiker observes that the water begins to boil at 82⁰C, much lower than the 100⁰C needed to cook the raw egg. He hopes that just leaving the egg in the boiling water longer will let the egg cook. Will he have hard-boiled eggs for breakfast?
Answer: :’)
Explanation:
Gravity affects orbits in outer space.
True or False????
calculate the height (in m) of a cliff if it takes 2.32 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.19 m/s. 7.37 correct: your answer is correct. seenkey 7.37 m (b) how long (in s) would it take to reach the ground if it is thrown straight down with the same speed? 0.649 correct: your answer is correct. seenkey 0.649 s
To calculate the height of the cliff and the time it takes for the rock to reach the ground when thrown straight down, we can use the equations of motion.
(a) Height of the cliff:
When the rock is thrown straight up, it reaches its highest point before falling back down. The time it takes for the rock to reach its highest point is equal to the time it takes for the rock to fall back down to the ground.
Using the equation:
s = ut + (1/2)at^2
Where:
s is the distance traveled (height of the cliff),
u is the initial velocity (8.19 m/s),
t is the time (2.32 s),
a is the acceleration due to gravity (-9.8 m/s^2, taking downward direction as negative).
Rearranging the equation:
s = ut + (1/2)at^2
s = (8.19)(2.32) + (1/2)(-9.8)(2.32)^2
s = 19.004 - 25.798
s = -6.794 m
Since the height of a cliff cannot be negative, we take the absolute value of the result:
Height of the cliff = |s| = 6.794 m
So, the height of the cliff is approximately 6.794 meters.
(b) Time to reach the ground when thrown straight down:
When the rock is thrown straight down with the same speed, the initial velocity (u) is still 8.19 m/s, but the acceleration due to gravity (a) remains -9.8 m/s^2.
Using the equation:
s = ut + (1/2)at^2
Where:
s is the distance traveled (height of the cliff, which is now negative),
u is the initial velocity (8.19 m/s),
t is the time we want to find,
a is the acceleration due to gravity (-9.8 m/s^2, taking downward direction as negative).
Substituting the known values:
-6.794 = (8.19)t + (1/2)(-9.8)t^2
Rearranging the equation:
-6.794 = 8.19t - 4.9t^2
Rearranging further:
4.9t^2 - 8.19t - 6.794 = 0
Solving this quadratic equation, we find two possible values for t: 0.828 seconds and 1.303 seconds. Since we are considering the time it takes to reach the ground, the valid solution is t = 0.828 seconds.
Therefore, when the rock is thrown straight down, it takes approximately 0.828 seconds to reach the ground.
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Debby and Ben took different routes to travel from Point A to Point E. Debby took the
route along A, B, C, D, and E. Ben took the route along A, G, F, and E. Debby and Ben
both took 4 hours to complete their walk. Their routes are shown.
Route in miles
D2 E
End
B2C
li
F
2
LL
3
10
Start
G
A
Which statement is true about Debby and Ben's average speed?
Debby's average speed was twice Ben's average speed,
Ben and Debby's average speed was the same,
Debby's average speed was three times Ben's average speed,
Ben's average speed was twice Debby's average speed.
List 3 main types weathering
Answer:
3 types of weathering are, physical, chemical and biological weathering.
Explanation:
Hope this helps and have a wonderful day!!!
The ____ of emitted light depends directly on the energy between the two orbits and this determines the color of the light
The frequency of emitted light is directly proportional to the energy between the two orbits and this determines the color of the light.
What is light?Light can be defined as a form of electromagnetic waves that does not require any medium for its propagation. This ultimately implies that, light is a form of wave that is generally referred to as a visual signal because it can be seen with the eyes.
According to the model of light wave, the frequency of emitted light is directly proportional to the energy between the two orbits and this determines the color of the light.
In conlcusion, the frequency of emitted light is highly dependent on the energy between the two (2) orbits.
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What do most ancient ruins have to do with Astronomy/Space?
They accurately show star positions
They demonstrate the number of galaxies in the Universe
The are usually aligned with the motion of the Sun
The are usually aligned with the motion of the Sun.
option C.
What do most ancient ruins have to do with Astronomy/Space?Many ancient ruins are aligned with astronomical phenomena and the motion of celestial bodies. This indicates that ancient cultures had a strong interest in and understanding of astronomy and its connection to the natural world.
For example, the ancient Egyptian pyramids at Giza are aligned with the cardinal directions and certain stars, such as the star Sirius. The Mayan city of Chichen Itza in Mexico has a famous pyramid known as El Castillo, which has specific alignments with the sun during the equinoxes and solstices. Stonehenge in England is another famous example, with the stones aligned to the movements of the sun, moon, and stars.
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Can an object with acceleration of zero be in motion?
Answer:
NO
Explanation:
if it has no acceleration then it's not moving
Answer:
Yes when the velocity is constant then the acceleration is said to be zero. Thus an object with 0 acceleration can be in motion.
Let me give you an example to make you more clear
Example:
When a car is traveling at a constant 90 km/h in a straight line has nonzero velocity and zero acceleration.