The atomic number of a nucleus decreases during which nuclear reactions?
A. Nuclear fission and alpha decay
B. Nuclear fusion and beta decay (positron emission)
C. Nuclear fission and beta decay (electron emission)
D. Nuclear fusion and alpha decay
Answers
The atomic number of a nucleus decreases during:
A. Nuclear fission and alpha decay
What happens in alpha decay?Alpha decay is an atomic rot process where a shaky core changes to one more component by shooting out a molecule made out of 2 protons and 2 neutrons. This catapulted molecule is known as an alpha molecule and is just a helium core.
It changes or 'rots' into an alternate nuclear core, with a mass number that is decreased by four and a nuclear number that is diminished by two.
Thus, option A is correct.
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Related Questions
What is Newton's third law of motion?
Answers
Answer:
His third law states that for every action (force) in nature there is an equal and opposite reaction. If object A exerts a force on object B, object B also exerts an equal and opposite force on object A. In other words, forces result from interactions
Explanation:Newton’s Third Law: Action & Reaction
Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
His third law states that for every action (force) in nature there is an equal and opposite reaction. If object A exerts a force on object B, object B also exerts an equal and opposite force on object A. In other words, forces result from interactions.
Examples of action and reaction involving aerodynamics:
The motion of lift from an airfoil, the air is deflected downward by the airfoil’s action, and in reaction, the wing is pushed upward. The motion of a spinning ball, the air is deflected to one side, and the ball reacts by moving in the opposite The motion of a jet engine produces thrust and hot exhaust gases flow out the back of the engine, and a thrusting force is produced in the opposite direction----------------
HOPE THIS HELPS <3
Newton's Third law of motion states :
" Every action has an equal and opposite reaction "
i.e If a force is applied by an object A on another object B then that object B also exerts a foce on object A, that is of same magnitude and opposite direction to the force applied by object A.
Ex - A book on a table exerts gravitational force on the table and table exerts back a normal force on the book.
A. It Implies That M Is Finitely Generated. B. It Implies That M Has Nonzero Elements Of Nonzero Order. C. When Every Non-Null Element Has Null . D. In The Case That The Ring R Is A Body. E. None Of The Above Alternatives Gives A
Which of the following alternatives give a true statement. Justify your answer.
A modulus M over a ring R has a finite basis:
a. It implies that M is finitely generated.
b. It implies that M has nonzero elements of nonzero order.
C. When every non-null element has null .
d. in the case that the ring R is a body.
e. None of the above alternatives gives a true statement.
Which of the following statements are true?
a. If a subset of a module generates that whole module, then the subset cannot be
empty.
b. Every submodule S of a module M verifies the inequality C. Two different subsets of M have to generate two different submodules of M.
d. If S generates a submodule N of the module M, then contains S.
e. Neither statement is true.
Answers
The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.
When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.
According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.
According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.
According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.
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Classify these relationships between the properties of waves as directly proportional or inversely proportional.
(a) wavelength and energy
(b) frequency and wavelength
(c) energy and frequency
Answers
Directly proportional is: energy and frequency; Inversely proportional: wavelength and energy and frequency and wavelength.
What are the relationships between the properties of waves?(a) The wavelength and energy are inversely proportional to each other. This implies that as the wavelength of a wave increases, its energy decreases, and as the wavelength decreases, energy increases.
(b) The frequency and wavelength are inversely proportional to each other. This implies that as frequency of a wave increases, its wavelength decreases, and as frequency decreases, wavelength increases.
(c) Energy and frequency are directly proportional to each other. This implies that as frequency of a wave increases, its energy also increases, and as frequency decreases, energy decreases.
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what is the geologic time scale and how is it used
Answers
Answer:
It is a type of map used to map out the geographical change over time. I believe
Explanation:
An electric kettle with shinny outer surface is more efficient than one with a dull outer surface. Give a reason for this
Answers
The shinny outer surface of an electric kettle reflects heat, which reduces energy loss. This helps to make the kettle more efficient, as it takes less energy to heat the water to the desired temperature.
What is the energy ?
Energy is the capacity for doing work. It is a fundamental concept in physics, and is defined as the ability to do work or transfer heat. It is a measurable quantity that can be converted into different forms, such as mechanical, electrical, thermal, chemical, or nuclear energy. Energy is necessary for all types of physical activities, including movement, growth, and development. It is also necessary for many natural processes, such as photosynthesis and respiration. In addition, energy is used to power many of the technologies we use in everyday life, such as computers and cars.
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4. Which term describes potential energy?
A. stored energy
B. future energy
C. kinetic energy
D. invisible energy
Answers
Answer:
c
Explanation:
A long wave with a period of about 15 minutes will travel across the oceans at a speed of approximately _______.
Answers
The speed of the wave is mathematically given as
v=2266.66m/s
A long wave with a period of about 15 minutes will travel across the oceans at a speed of approximately v=2266.66m/s
Speed of the waveQuestion Parameters:
A long wave with a period of about 15 minutes
Generally the equation for the Wave velocity is mathematically given as
v=\lambda * frequency
Where
f=1/t
Therefore
v=\lambda * frequency
v=\lambda * 1/t
Therefore, with wavelenght of the ocean as 34km
v=34*1000*1/15
v=2266.66m/s
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A velocity selector is used in accelerator mass spectrometry to select particles based on their speed. The velocity selector is composed of orthogonal electric and magnetic fields, such that particles with the correct charge to mass ratio and speed will be unaffected, and other particles will be deflected. If the Electric Field is oriented down, What is the direction of the Magnetic Field
Answers
If the electric field in the velocity selector is oriented downward, the magnetic field should be oriented either into the page or out of the page to ensure that the desired particles with the correct charge-to-mass ratio and speed are unaffected while others are deflected.
In a velocity selector, the electric and magnetic fields are arranged in a specific configuration to select particles based on their speed and charge-to-mass ratio. When the electric field is oriented downward, the magnetic field must be perpendicular to it to achieve the desired effect. The direction of the magnetic field can be determined by applying the right-hand rule, which states that if you point your right thumb in the direction of the velocity of a positive particle, the magnetic field should be oriented such that the magnetic force on the particle is perpendicular to both the velocity and the magnetic field.
Since the electric field is oriented downward, we can assume that the positive particles are moving upward to counteract the electric force. Therefore, if we point our right thumb upward, in the opposite direction of the particle's velocity, the magnetic field should be oriented into the page or out of the page.
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what is the weight of a 3.67kg ball?
Answers
Answer:
mass 3.67 kg, density 600 kg/m3) is fitted
with lead (density 1.14 * 10^4 kg/m3) so that it floats in water with
0.900 of its volume submerged. Find the lead mass if the lead is fitted
to the block’s (a) top and (b) bottom.
Blank is a good way to for me to see where I am going while
dribbling
Answers
Answer:
???
Explanation:
A car has a kinetic energy of 4.32 x 10J when traveling at a speed of 23 m/s. What is its mass?
Answers
Answer
0.163 kg
Explanation:
\(\sf Kinetic \ Energy = \dfrac{1}{2} \ x \ mass \ x \ velocity^2\)
Here we are provided with:
1) Kinetic Energy = 4.32 x 10 Joules ≈ 43.2 Joules
2) Speed/Velocity = 23 m/s
Now, solve for mass:
\(\rightarrow \sf \dfrac{1}{2} \ x \ mass \ x \ velocity^2 = Kinetic \ Energy\)
\(\rightarrow \sf \dfrac{1}{2} \ x \ mass \ x \ (23)^2 =43.2\)
\(\rightarrow \sf mass= \dfrac{43.2 (2)}{23^2}\)
\(\rightarrow \sf mass= 0.163 \ kg\)
The velocity of the pull through the ticker time graph it is going 50 times a second and 0.121 m and 10 dots
Answers
Answer:
0,6
Explanation:
from the picture there are 10 dots. It means that the time needed to make these dot is
10/50 * 1 sec = 0.2 sec
the length (or we can say distance) of 10 dots are 12 cm. we must convert to meter so it become 0.12 m
v = d/t = 0.12/0.2 = 0.6 m/s
. (2 points) What will the escape velocity be when the Sun becomes a red giant with a radius 50 times greater and a mass only 0.9 times that of today?
Answers
v = sqrt(2GM/r)
where v is the escape velocity, G is the gravitational constant, M is the mass of the object (in this case, the Sun), and r is the distance from the center of the object to the point where the escape velocity is being calculated.
When the Sun becomes a red giant with a radius 50 times greater, the new radius (r') will be:
r' = 50 * r
The new mass (M') will be:
M' = 0.9 * M
Substituting these values into the formula, we get:
v' = sqrt(2 * G * (0.9 * M) / (50 * r))
Simplifying:
v' = sqrt(0.036 * GM / r)
So the escape velocity when the Sun becomes a red giant with a radius 50 times greater and a mass only 0.9 times that of today will be about 0.6 times the current escape velocity.
an organ pipe is 80.0 cm long and is open at one end and closed at the other. the frequency of the third mode is 200 hz higher than the frequency of the second mode. what is the speed of sound?
Answers
The speed of sound in the organ pipe is 320 m/s.
To find the speed of sound, we will first determine the frequencies of the second and third modes for a closed pipe organ.
For a closed pipe, the formula for the fundamental frequency (first mode) is:
f1 = v / 4L
where f1 is the fundamental frequency, v is the speed of sound, and L is the length of the pipe.
The second mode (n=3, because only odd harmonics are allowed in a closed pipe) and third mode (n=5) frequencies are:
f2 = 3 * f1
f3 = 5 * f1
We know that f3 - f2 = 200 Hz. Substituting the expressions above, we get:
5 * f1 - 3 * f1 = 200 Hz
2 * f1 = 200 Hz
Now, we can find the fundamental frequency:
f1 = 200 Hz / 2 = 100 Hz
Now we will use the formula for the fundamental frequency of the closed pipe to find the speed of sound:
f1 = v / 4L
100 Hz = v / (4 * 0.8 m)
Solving for v:
v = 100 Hz * (4 * 0.8 m)
v = 320 m/s
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In an experiment to determine the efficiency of a new assistive device for seniors, a kinesiologist sets up an experiement with several weights and pulleys. When he calibrates the scale it registers each weight as three kilograms greater than it actually is. What impact does this have on the experiment
Answers
The experiment will be impacted by an overestimation of the weights due to the scale registering each weight as three kilograms greater than their actual values.
The calibration error of the scale, which registers each weight as three kilograms greater than it actually is, will lead to an overestimation of the weights used in the experiment. This overestimation can have several effects on the experiment and its results.
Firstly, the calculated forces or loads applied by the weights will be higher than their actual values. This can affect the measurements and analysis of the performance of the assistive device. If the device is designed to handle specific loads, the overestimated weights may give a false impression of its capabilities and efficiency.
Secondly, the overestimation of weights can introduce errors in any calculations or comparisons made during the experiment. For example, if the experiment involves comparing the force required to lift different weights, the overestimated weights can skew the results and make it difficult to accurately evaluate the device's efficiency.
To mitigate this impact, it would be necessary to account for the calibration error of the scale and make appropriate adjustments to the recorded weights during the data analysis phase. This would help ensure that the experiment's results and conclusions are based on accurate measurements and reflect the true performance of the assistive device.
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A person who takes 30 mins to bike five miles west to the store and returns home in 30mins via the same routes.
What is the average of speed and velocity?
Answers
Answer: To determine the speed of an object, you need to know the distance traveled and the Time = 4.0 seconds The speed of the cheetah in miles per hour is 63 mph 5. How far can a person run in 15 minutes if he or she runs at an average .
Explanation: I hope that was helpful !
D X Answered-Incorrect. 1 attempt left An object is launched along the incline of angle 30 degrees with horizontal from its bottom level with initial velocity 7. 4 m/s. It reaches height 1. 1 m, comes to momentarily stop and slides back. When it comes back to initial point it has velocity 3. 5 m/s. Find coefficient of friction between object and an incline. 1. 764 X Answered-Incorrect Resubmit 5. E X Answered-Incorrect 2 attempts left A block of mass 3. 3 kg sliding along horizontal rough surface is traveling at a speed 3. 0 m/s when strikes a massless spring and compresses spring a distance 5. 0 cm before coming to stop. If the spring has stiffness constant 500. 0 N/m, find coefficient of friction between block and surface. 0. 879 X Answered-Incorrect
Answers
According to the given statement, the coefficient of friction between the block and the surface is approximately 0.000772.
The coefficient of friction is a measure of the interaction between two surfaces in contact. It represents the amount of resistance or friction between the surfaces. In the given problem, we need to find the coefficient of friction between the block and the surface.
To find the coefficient of friction, we can use the equation:
μ = (k * x) / (m * g)
where:
- μ is the coefficient of friction
- k is the stiffness constant of the spring
- x is the distance the spring is compressed
- m is the mass of the block
- g is the acceleration due to gravity (approximately 9.8 m/s²)
Given values:
- k = 500.0 N/m
- x = 5.0 cm = 0.05 m
- m = 3.3 kg
First, let's convert the distance x to meters by dividing it by 100:
x = 0.05 m
Now, we can substitute the given values into the equation:
μ = (500.0 N/m * 0.05 m) / (3.3 kg * 9.8 m/s²)
Calculating this expression:
μ = 0.025 / 32.34
μ ≈ 0.000772
Therefore, the coefficient of friction between the block and the surface is approximately 0.000772.
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a closed column of water has a diameter of 1.4 m and a depth of 9.6 m. how much pressure is at the bottom of the column? the acceleration of gravity is 9.8 n/kg . answer in units of pa.
Answers
The pressure at the bottom of the column is determined as 94,080 Pa.
What is the hydrostatic pressure of the water column?
The hydrostatic pressure of the water column is pressure exerted due to the vertical column of water and it can be calculated by applying the following formula.
Mathematically, hydrostatic pressure is given as;
P = ρgh
where;
ρ is the density of waterg is acceleration due to gravity h is the vertical height or column of the waterThe given parameters include the following;
the density of water, ρ = 1000 kg/m³the acceleration due to gravity, g = 9.8 m/s² the vertical height or column of the water, h = 9.6 mSubstitute the above parameters and solve for the pressure exerted by the water column.
P = 1000 x 9.8 x 9.6
P = 94,080 Pa
Thus, the pressure exerted by the column of the water depends on the depth of the water or water column.
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5
Drag each tile to the correct box.
Adam takes a bus on a school field trip. The bus route is split into the five legs listed in the table. Find the average velocity for each leg of the trip.
Then arrange the legs of the trip from highest velocity to lowest:
Leg Distance (km) Time (min)
A 18
9
B 25
15
C С 24
8
D
48
12
E
15
7
leg A
leg B
leg C
leg D
leg E
Reset
Next
Answers
2) C
3) E
4) A
5) B
Answer:
1) D
2) C
3) E
4) A
5) B
Explanation:
Hope this help!
What can occur when air rises in a low pressure system?
Answers
When air rises in a low-pressure system, it can lead to the formation of clouds and precipitation, such as rain or snow. The rising air also cools and condenses, releasing latent heat, which can further contribute to the development of the storm.
What happens in a low-pressure system?A low-pressure system is a weather pattern characterized by a region of lower atmospheric pressure compared to the surrounding areas. It is often associated with unsettled and stormy weather.
How are clouds formed?Clouds are formed when moist air rises and cools, causing water vapour to condense into tiny water droplets or ice crystals. This process occurs when the temperature of the air decreases, either because it is rising, or because it is mixing with cooler air.
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If you planned to bike to a park that was five miles away, what average speed would you have to maintain to arrive in about 15 min? (
Answers
The average speed you need to maintain is 0.33 miles per minute.
The average speed is the speed that you maintain throughout the journey. It is obtained as; Total distance covered/Total time taken
If we have the following information from the question;
Distance covered = 5 miles
Time taken = 15 mins
Then it follows that;
Average speed = Distance/time
Average speed= 5 miles/15mins
Average speed = 0.33 miles per minute.
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What is molasses?
dye
sugar
brown candy
brown syrup
I need help fast please I will give you extra points
Answers
Answer: Brown syrup
Explanation:
Answer:
syrup
Explanation:
if the train is accelerating and the bisicle is traveling at a constant velocity, what do you know about their speed?
Answers
When we say that momentum is "conserved," we meanA. The momentum of an object is the same before and after a collision.B. The momentum of the universe increases; it never decreases.C. The momentum of an isolated system is constant.D. If there are no forces acting on an object, its momentum is zero
Answers
A. The momentum of an object is the same before and after a collision.
What is momentum?The word Momentum is defined as the product of the mass of a object and its velocity. Momentum is a vector quantity that is it has both magnitude and direction. Newton's second law of motion says that the time rate of change of momentum is equal to the force acting on the an object.
The conservation of momentum is defined as within some problem area , the quantity of momentum stays constant; momentum is neither created nor destroyed, but just changes through the action of forces as mentioned by Newton's laws of motion.
So we can conclude that option A is the correct answer.
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joshua is attracted toward earth by a 500 -n gravitational force. the earth is attracted toward joshua with a force of zero. 500 n. 250 n. 1000 n. none of the above
Answers
none of the above. According to Newton's third law of motion, for every action, there is an equal and opposite reaction.
In this case, if Joshua is attracted toward Earth by a 500 N gravitational force, then by Newton's third law, Earth is also attracted toward Joshua with an equal and opposite force of 500 N. The gravitational force between two objects is always mutual and equal in magnitude but opposite in direction.
Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object exerts an equal and opposite force on the first object. The forces always occur in pairs and act on two different objects.
For example, if you push against a wall with a certain amount of force, the wall pushes back on you with an equal amount of force in the opposite direction. Another example is the propulsion of a rocket. The rocket pushes exhaust gases backward, and in response, the gases push the rocket forward with an equal force.
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The number of protons is equal to the atomio mass minus the alomo
number
A True
B. False
Answers
_______ is the energy available for a reaction to do work.Question 19 options: Heat Enthalpy Free energy Entropy
Answers
A baseball with a mass of 0.125 kg is hit toward the pitcher at a speed of 45 m/s. The pitcher's glove stops the baseball in 0.05 seconds. Find the magnitude of the impulse applied to the ball.
O .28 NS
O 110 NS
O 2.3 Ns
O 5.6 Ns
Answers
A biker is going uphill, in one hour he traveled just 20km. What is his speed?
Answers
Explanation:
Speed = distance / time
= 20 km / 1 hr
= 20 km/hr
≈ 5.56 m/s
Which best describes solubility? the speed at which a substance dissolves the ability of one substance to dissolve in another the amount of surface area per a given mass the temperature at which subtances become a mixture
Answers
Answer:
The ability of a substance to dissolve into another, called the solvent.
Explanation:
That is why water is called "the universal solvent."
Because it can dissolve almost anything.
The speed and temperature have nothing to do with solubility.
Answer:
the ability of one substance to dissolve in another
Explanation: