Answer:
d) 2Fr
Explanation:
We know that the work done in moving the charge from the right side to the left side in the k shell is W = ∫Fdr from r = +r to -r. F = force of attraction between nucleus and electron on k shell. F = qq'/4πε₀r² where q =charge on electron in k shell -e and q' = charge on nucleus = +e. So, F = -e × +e/4πε₀r² = -e²/4πε₀r².
We now evaluate the integral from r = +r to -r
W = ∫Fdr
= ∫(-e²/4πε₀r²)dr
= -∫e²dr/4πε₀r²
= -e²/4πε₀∫dr/r²
= -e²/4πε₀ × -[1/r] from r = +r to -r
W = e²/4πε₀[1/-r - 1/+r] = e²/4πε₀[-2/r} = -2e²/4πε₀r.
Since F = -e²/4πε₀r², Fr = = -e²/4πε₀r² × r = = -e²/4πε₀r and 2Fr = -2e²/4πε₀r.
So W = -2e²/4πε₀r = 2Fr.
So, the amount of work done to bring an electron (q = −e) from right side of hydrogen nucleus to left side in the k shell is W = 2Fr
A key lime pie in a 10.00 in diameter plate is placed upon a rotating tray. Then, the tray is rotated such that the rim of the pie plate moves through a distance of 208 in. Express the angular distance that the pie plate has moved through in revolutions, radians, and degrees. A) Find the angular distance in revolutions, radians and degrees. B)If the pie is cut into 5 equal slices, express the angular size of one slice in radians, as a fraction of .
Answer:
A
The distance in revolutions is [tex]n = 7 \ revolutions[/tex]
The distance in degrees is [tex]\theta =2529 ^ o[/tex]
The distance in radian is [tex]\theta_{radian } = 44.15 \ rad[/tex]
B
[tex]\theta_a = 1.26 \ rad[/tex]
Explanation:
From the question we are told that
The diameter of the pie is [tex]d = 10.00 \ in[/tex]
The distance covered by the rim is [tex]D = 208 \ in[/tex]
The number which the pie is divided into is k = 5
Generally the radius of the pie is mathematically represented as
[tex]r = \frac{d}{2}[/tex]
=> [tex]r = \frac{10}{2}[/tex]
=> [tex]r = 5 \ in[/tex]
Generally the distance covered by the rim is mathematically represented as
[tex]D= 2 \pi r n[/tex]
=> [tex]208 = 2* 3.142 * 5 * n[/tex]
=> [tex]n = 7 \ revolutions[/tex]
Generally converting to degrees
[tex]\theta = n * 360[/tex]
=> [tex]\theta = 7 * 360[/tex]
=> [tex]\theta =2529 ^ o[/tex]
Generally converting to radian
[tex]\theta_{radian } = \frac{\theta * \pi}{180 }[/tex]
=>[tex]\theta_{radian } = \frac{2520 * 3.142 }{180}[/tex]
=>[tex]\theta_{radian } = 44.15 \ rad[/tex]
Generally the angular size of one piece of the pie is
[tex]\theta_a = \frac{2 * \pi }{ k}[/tex]
=> [tex]\theta_a = \frac{2 * 3.142}{ 5}[/tex]
=> [tex]\theta_a = 1.26 \ rad[/tex]
(a) The angular distance is 0.168 revolution, 1.056 radians and 60.5⁰.
(b) The angular size of one slice in radians is 2π radian.
The given parameters;
diameter of the pie, d = 10 mradius of the pie, r = 5 mdistance traveled by the rim, d = 208 in = 5.28 mThe angular distance traveled by the pie plate is calculated as follows;
2πr = 5.28
[tex]2\pi = \frac{5.28}{r} \\\\2 \pi = \frac{5.28}{5} \\\\2\pi = 1.056 \ rad\\\\\frac{1 \ rev}{2\pi \ rad } \times 1.056 \ rad = 0.168 \ rev[/tex]
[tex]1.056 \ rad \times \frac{360^0}{2\pi \ rad} = \ 60.5^0[/tex]
Thus, the angular distance is 0.168 revolution, 1.056 radians and 60.5⁰.
The circumference of the pie is calculated as follows;
C = 2πr
C = 2π x 5
C = 10π
Diving the pie into 5 equal slice;
[tex]Fraction \ of \ one \ part \ in \ radian= \frac{10\pi}{5} = 2\pi\ radian[/tex]
Thus, the angular size of one slice in radians is 2π radian.
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Darius' boat sails into the harbor with a speed of 80m/s. After 20 seconds, Darius' boat has come to a stop at the dock. What is his boat's acceleration?
Answer:
The boat's acceleration is 4 m/s²
Explanation:
This question seeks to test the knowledge of acceleration and how to calculate acceleration when the speed is provided. Hence, the formula for acceleration would be used here.
Acceleration (m/s²) = speed (in m/s) ÷ time (in seconds)
Acceleration = 80 m/s ÷ 20 secs
Acceleration = 4 m/s² or 4 ms⁻²
The boat's acceleration is 4 m/s²
The mechanical advantage of a lever is 4 . what does it mean?
Answer:
It means...
Explanation:
The mechanical advantage of a machine is 4. Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 4 means that for example if you apply 100 N then your machine will multiply that force and generate 400 N.
Answer:
The mechanical advantage of a lever is 4 means that the lever can lift a load which is four times greater than the applied effort.
Hope I helped!
Best regards! :D
~[tex] \text{TheAnimeGirl}[/tex]
When does the difference between two vectors equal to zero ?
Answer: Yes, two vectors of equal magnitude that are pointing in opposite directions will sum to zero
Explanation: Two vectors of unequal magnitude can never sum to zero. If they point along the same line, since their magnitudes are different, the sum will not be zero.
In Alamogordo, New Mexico, falling rocks are a hazard along US Highway 82. If a rock falls from a cliff with 157 N of force,what was the mass of the rock?
Answer:
Mass, m = 16.02kg
Explanation:
Given the following data;
Force, F = 157N
Since it's a free fall, acceleration, a = g = 9.8m/s² (acceleration due to gravity).
To find the mass;
Force is given by the multiplication of mass and acceleration.
Mathematically, Force is;
[tex] F = ma[/tex]
Where;
F represents force measured in Newton.m represents the mass of an object measured in kilograms.a represents acceleration measured in meter per seconds square.Making mass (m) the subject of formula, we have;
[tex]Mass (m) = \frac{F}{a}[/tex]
Substituting into the equation;
[tex]Mass (m) = \frac{157}{9.8}[/tex]
Mass, m = 16.02kg
Therefore, the mass of the rock is 16.02kg.
HELPP!! Does anybody have the answer key to Lab Report: Conservation of Linear Momentum for my online class for physics?? WILL GIVE 80points
Answer:
Try copy and pasting the intructions it into google, and it should pop up if it exists.
Hope this helps.
Explanation:
Answer:
Send me the download of the lab and I will complete it for you
Which of the following are examples of Multiple Intelligences:
•being good at sales
•being good at rapping or beatboxing
•being good at math
•all the above
Answer: All of the above.
Explanation:
Which of these determines an objects ability to sink or float in water?
Group of answer choices
1A. Density
B. Volume
C. Mass
D. Weight
Answer:
C. Density
Explanation:
Can include a single word part on one side , with the meaning on the other side . Stephen can test himself or can enlist the help of someone else to hold them up to test him
Incomplete question; Full question read;
Type the correct answer in the box. Spell all words correctly. Stephen is a student who wants to test his knowledge of medical terminology. Which option could he use?
For medical terminology, ___________ can include a single word part on one side, with the meaning on the other side. Stephen can test himself or can enlist the help of someone else to hold them up to test him.
Answer:
Flashcard
Explanation:
It is interesting to note that a flashcard is an effective memory and teaching aid. It usually has a question on one side, and the other side contains the answer.
Hence, Stephen can build his knowledge of medical terminology by making use of a flashcard himself or can enlist the help of someone else to hold them up to test him.
6. A light ray strikes a reflective plane surface at an angle of 560 with the surface.
a) Find the angle of incidence.
b) Find the angle of reflection.
c) Find the angle made by the reflected ray and the surface.
d) Find the angle made by the incident and reflected rays.
Answer:
deez nouts
Explanation:
whats the net force
Answer:
13 N to the left
Explanation:
the right side adds up to 1550 13 less than the other side. the box will then be pushed left with 13 newtons of force.
Which forces keep the bottle moving
round and round?
Answer:
Centripetal force
Explanation:
The force that keeps a bottle moving round and round in circular motion is centripetal force.
Centripetal force is an inward directed force that keeps a body in circular motion. This force keeps a body moving along a circular path.
To find the force, we use the expression below;
F = [tex]\frac{mv^{2} }{r}[/tex]
F is the centripetal force
m is the mass of the body
v is the velocity
r is the radius
Vector A⃗ points in the negative y direction and has a magnitude of 5 km. Vector B⃗ has a magnitude of 15 km and points in the positive x direction. Use components to find the magnitude of
a) A+B
b) A-B
c) B-A
Give Example of mental flexibility
Answer:
If you ring the doorbell and no one opens the door, you'll infer that no one is home rather than continuing to ring the doorbell to an empty house. Being able to understand this and look for another solution is another example of mental flexibility.
Explanation:
An object on Earth weighs 150 N. What is its mass?
15 g
150 kg
150 g
15 kg
Answer:
15kg
Explanation:
mass = weight / gravitational field strength
mass = 150 / 9.8 = 15kg (nearest whole no)
The mass of the object on earth whose weight is 150 N will be 15.3 Kg
What is Mass?Mass is the amount of matter present inside a body. It is defined as the product of density and volume. It remains constant through out the universe. Mathematically -
M = ρV
where -
M is Mass
ρ is density
V is volume
Given is your weight on earth which is equivalent to 150 N.
We know that the weight of of an object is a force exerted by the earth towards its center. It can be written as -
W = mg
Weight of the object = [W] = 150 N
Acceleration due to gravity on earth = [g] = 9.8 m/s²
Substituting the values -
150 = m x 9.8
m = 150/9.8
m = 15.3 Kg
Therefore, the mass of the object on earth whose weight is 150 N will be 15.3 Kg.
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The energy released or absorbed by a substance during a change of state
Answer:
Specific latent heat or specific vaporation vaporization heat
on:
Uses mass only do to no temperature change only state
What is SI unit for distance
Answer:
meter
The SI unit of distance and displacement is the meter [m].
Explanation:
have advancedd
Answer:
meter
Explanation:
it is meter I hope this is helpful
A car is traveling with a velocity of 5.5 m/s and has a mass of 1200 kg. What is the kinetic energy?!
Answer:
18150 JExplanation:
The kinetic energy of the car can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the Mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 1200 \times {5.5}^{2} \\ = 600 \times 30.25[/tex]
We have the final answer as
18150 JHope this helps you
A subway car moves at a constant speed of 10 m/s over a period of 10 s. What is the instantaneous speed halfway through this motion
Answer: 10 m/s
We're told the speed is constant, so it's not changing throughout the time period given to us. So throughout the entire interval, the speed is 10 m/s.
What is the value of the initial horizontal velocity?
Answer:
9.8 m/s/s
Explanation:
The horizontal velocity of a projectile is constant (a never changing in value), There is a vertical acceleration caused by gravity; its valueis 9.8 m/s/s, down, The vertical velocity of a projectile changes by 9.8 m/s each second, Thehorizontal motion of a projectile is independent of its vertical motion.
Answer:
the horizontal component of the velocity, however, retains its initial value v0x=+115 m/s throughout the entire descent.
Explanation:
since the plane also travels at a constant horizontal velocity of +115 m/s, it remains directly above the falling package.
The psychologist who believed that behaviors that are followed by favorable consequences tend to be repeated was __________.
A.
James B. Watson
B.
B. F. Skinner
C.
Edward Thorndike
D.
Franz Mesmer
Answer:
the answer is B
Explanation:
The development of the theory of reinforcement by B. F. Skinner (Burrhus Frederick Skinner) and his behaviors support for its application to learning contributed to the emergence of the behaviorism and programmed instruction movements. Thus, option B is correct.
What psychologist believed that behaviors by favorable?Small instructional frames, self-pacing, active learner reaction to inserted questions, and fast feedback regarding behaviors the accuracy of a response are all characteristics of programmed instruction.
In essence, individualized education substitutes methodical or pre-programmed materials for the behaviors. Individualized teaching can be delivered by print, computer, or other medium as long as it is founded on the ideas mentioned above.
Therefore, The psychologist who believed that behaviors that are followed by favorable consequences tend to be repeated was B. F. Skinner.
Learn more about behaviors here:
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A 60 kg adult and a 30kg child are passengers on a rotor ride at an amusement park as shown in the diagram above. When the rotating hollow cylinder reaches a certain constant speed, v, the floor moves downward. Both passengers stay "pinned" against the wall of the rotor, as shown in the diagram below.
The magnitude of the frictional force between the adult and the wall of the spinning rotor is F. What is the magnitude of the frictional force between the child and the wall of the spinning rotor?
Answer:
fr ’= ½ F
Explanation:
For this exercise we use the translational equilibrium equation, on the axis parallel to the wall
fr - W = 0
fr = W
for the adult man they indicate that the friction force is equal to F
F = M g
we write the equilibrium equation for the child
fr ’= w’
fr ’= m g
in the statement they tell us that the mass of the adult is 2 times the mass of the child
M = 2m
we substitute
fr ’= M / 2 g
fr ’= ½ Mg
we substitute
fr ’= ½ F
therefore the force of friction in the child is half of the friction in the adult
anybody wana play imvu or 2k
calculate the Kinetic energy given the Velocity is 5 m/s and the mass = 20 kg
Answer:
250 Joules
Explanation:
The formula is KE = 1/2m*v^2
Attachment Lab:Conservation of Linear Momentum
Answer:
This is what I got the teacher hasn’t graded it yet so sorry if it’s not right
Explanation:
What is the role of friction when ; a boats engine stops
The water exerts a net drag force on the boat, and tends to make the boat move along with the average water flow, or stay put if the water isn't going anywhere. The water will heat up slightly as energy from the big motion ...
Which are the basic physical sciences?
Answer:The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.
Answer:
Chemistry, physics, astronomy and earth science.
Explanation:
The four main categories of physical sciences are chemistry, physics and earth science and astronomy. Life sciences deal with living organisms and behavioral sciences deals with the interactions between organisms in the natural world.
which would have more momentum an elephant standing in one place or a small bird slowly flying through the air
Answer:
Elephant
Explanation:
has a larger mass which equates to greater momentum
Which characteristic is not a characteristic of plastic? A. Polymers are substances that have relatively large molecules. B. Oil and gas are the starting materials for making all polymers. C. Fabrics such as cotton and silk are synthetic polymers D. All polymers are obtained from living organisms
Answer: option C.
Fabrics such as cotton and silk are synthetic polymers
Explanation:
Fabrics such as cotton and silk are synthetic polymers because cotton and silk are natural polymers meaning they are gotten from natural source. Cotton is gotten from cotton plants and it is composed of cellulose which is a carbohydrates.
Silk also is gotten from animals I.efrom insect fibre or the cocoons of the larvae of the mulberry silkworm which is a polymer.
What is the elastic potential energy of a spring that is compressed a distance of 0.35 m and has a spring constant of 71.8 N/m?
Answer:
P.E = 4.398 Joules.
Explanation:
Given the following data;
Spring constant, k = 71.8N/m
Displacement, x = 0.35m
To find the elastic potential energy;
The elastic potential energy of an object is given by the formula;
[tex] P.E = \frac {1}{2}kx^{2}[/tex]
Substituting into the equation, we have;
[tex] P.E = \frac {1}{2}*71.8 *(0.35)^{2}[/tex]
[tex] P.E = 35.9 * 0.1225 [/tex]
Elastic potential energy = 4.398 Joules.
Therefore, the elastic potential energy of the spring is 4.398 Joules.
