126 J work input is required in each cycle .
Work is the product of the component of the force in the direction of the displacement and the magnitude of this displacement.
Mathematically, the above statement is expressed as follows:
W = (F cos θ) d = F. d
Where,
W is the work done by the force.
F is the force, d is the displacement caused by force
θ is the angle between the force vector and the displacement vector
The dimension of work is the same as that of energy and is given as, [ML2T–2].
Given,
refrigerator absorbs 230 J of heat from the freezer
expels 356 J of heat to the room
work input is required in each cycle = 356 - 230
= 126 J.
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the focal length of a thin lens is 40 mm and its aperture diameter is 10 mm. what is the f-number of this lens?
The f-number is 4
We need to know about f-number to solve this problem. The f-number of an optical system such as a camera lens is the ratio of the system's focal length to the diameter of the entrance pupil . It can be written as
N = f / D
where N is f-number, f is focal length and D is aperture diameter
From the question above, we know that
f = 40 mm
D = 10 mm
By substituting the question above, we know that
N = f / D
N = 40 / 10
N = 4
Hence, the f-number is 4
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in order that the connections inside an outlet box remain accessible, the nec requires that a surface extension from an outlet box cover be made using .
In order that the connections inside an outlet box remain accessible, the NEC requires that a surface extension from an outlet box cover be made using a flexible conduit only.
In the "surface extension" concept, the damper border dimensions are simply increased in relation to the air gap height. The extension coefficient is constant for continuum flow, but the rarefied gas causes the extension to vary on Kn. The elongation increases as Kn rises.
When a box's lid is constructed so that it is unlikely to come off or be removed if its locking mechanism becomes loose, one can create a surface extension from it. The wiring technique must be built for a length that is permitted and allows access to the inside of the box by removing the cover, and it must be set up such that any grounding continuous is independent of the connection between the box and cove.
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Complete Question:
The NEC requires that a box or conduit body be installed at each conductor splice connection point. In order that the connections inside an outlet box remain accessible, the NEC requires that a surface extension from an outlet box cover be made using ____.
A+tennis+ball+bounces+on+the+floor+three+times.+if+each+time+it+loses+22%+of+its+energy+due+to+heating,+how+high+does+it+rise+after+the+third+bounce,+provided+we+released+it+3.1+m+from+the+floor?
If a tennis ball bounces on the floor three times. if each time it loses 22% of its energy due to heating, the height it will rise after the third bounce, provided we released it 3.1 m from the floor is 1.4725 m.
What is energy loss due to heating?
The deliberate or accidental transfer of heat from one material to another is known as heat loss. Radiation, convection, and conduction can all contribute to this. When a component comes in direct touch with another component, whether it is insulated or not, conduction frequently happens. When a pipe, electric heater, or other component has an air barrier surrounding it, convection occurs. When there is no touch and heat is transmitted as waves, radiation results.
given,
Height = 3.1 m
Energy loss = 22%
Let, the total energy be equal to 1 unit
Balance of energy after first collision = 0.78 x 1 unit
= 0.78 unit
Balance after second collision = 0.78 ^2 unit
= 0.6084 unit
Balance after third collision = 0.78 ^3 unit
= 0.475 unit
Height achieved by the third collision will be equal to energy remained
H be the height achieved after 3 collision
0.475 ( m g h) = m g H
H = 0.475 x h
H = 0.475 x 3.1 m
H = 1.4725 m
Therefore,
It will rise up to 1.4725 m after the third bounce.
Complete Question
A tennis ball bounces on the floor three times. if each time it loses 22% of its energy due to heating, how high does it rise after the third bounce, provided we released it 3.1 m from the floor?
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-50 1/2 + 12.3
What's answer
Answer:
-12.7
Explanation:
Answer: -38.2
Explanation: -50 1/2 + 10 = -40 1/2 + 2 = 38 1/2 + 0.3 = 38.2
a computer's power supply converts mains ac to low-voltage regulated dc power for the internal components of a computer. you are building a new computer. you are deciding which type of power supply to install. which of the following definitions best describes a valid type of power supply?
The definition that best describes the given statement is given below:
Dual rail electricity supply includes independent tracks, P C B traces that are used to offset the voltage sags between different circuits, avoiding overloading of any circuit.
A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways, tracks or signal traces etched from copper sheets laminated onto a non-conductive substrate.
Practically all inverters use semiconductors to deliver a controlled power output. If the source does have an ac input, then an input voltage is rectified.
Therefore, it's the right answer.
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The resolution of radio telescopes suffers greatly from the large wavelengths of the light they are observing. What can be done to a radio telescope to improve its angular resolution?.
make its dish bigger to improve its angular resolution
Because the wavelengths of radio waves are so larger than the wavelengths of visible light, radio telescopes must be much larger than optical telescopes. The wavelengths of radio waves range from 3 km to 1 cm, while the wavelengths of visible light range from 4 x 10-7 m (ultraviolet) to 7 x 10-7 m. (red). The degree of detail that can be observed in an area of the sky is measured in terms of angular resolution. More detail can be seen at a given wavelength with a larger telescope. The wavelength of the light or radio waves being observed by the telescope (λ) and the telescope's diameter (D) can be used to compute the angular resolution (θ) of the telescope.
θ = 2.5 × 105 × λ/D
θ = 1.22 × λ/D
The ability of any image-forming tool, such as a optical or radio telescope, a microscope, a camera, or an eye, to differentiate minute features of an object is known as angular resolution, and as such, it is a key factor in determining picture resolution. It is utilized in the application of acoustics to sound waves, antenna theory to radio waves, and optics to light waves.
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A pumpkin is dropped from a 35 m building. What is its initial velocity (vi )?
Answer:
0 m/s
Explanation:
It is correct answer.
which low-energy state of condensed matter is characterized by structural rigidity and resistance to changes of shape or volume? gas
The low-energy state of condensed matter is characterized by structural rigidity and resistance to changes of shape or volume is solid.
Solids are made from the least energetic debris, which vibrate desk bound. As a end result, a solid acquires properties like a awesome form and quantity.
A substance's frozen kingdom of rely is what's called a solid. It is not important for a substance to freeze at a low temperature. as an instance, the tap at your chemistry lab station and the faucets in your property are each product of frozen chrome steel, as are your desk, pencils, pens, cell telephones, and computers. something is solid is frozen.
The molecules of count are more stiff and move less when it's miles in its stable state.
moreover, they are greater immune to shape changes. imagine ice, that's water in its strong kingdom. Ice is a ways extra strong in its structure than liquid water, making it greater hard to shape-alternate.
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I need help getting this done!
I don’t understand how to do this so I need help!
Answer:
1. Net force = 20 N
Direction = Right
Unbalanced
2. Net force = 7 N
Direction = Right
Unbalanced
3. Net force = 25 N
Direction = Left
Unbalanced
4. Net force = 60 N
Direction = Left
Unbalanced
5. Net force = 0
Direction = There is no motion, and it is not moving in any direction, it is at rest.
Balanced
6. Net force = 4 N
Direction = Down
Unbalanced
Explanation below
Hope this helps :)
Explanation:
To calculate net force, we must look at the direction it's pointing and the number of Newtons (N). If the arrow/arrows are pointing in the same direction, add the numbers, and the direction would be where the arrow is pointing (left,right,up,down). If the arrow/arrows are pointing in different directions, subtract the bigger and little number, and the direction would be where the bigger number is pointing (left,right,up,down).
It is only balanced when the net force is equal to zero. If the net force equals a number that's not zero like 1 and continuing on forever then it would be unbalanced.
What is the effect on species diversity of dumping untreated sewage into a waterway?
Raw sewage contains microorganisms that can harm ecological systems as well as make people and animals ill. In addition to bacteria and viruses, raw sewage frequently include germs that are harmful to human health. Additionally, there are additional substances in raw sewage that are just poisonous to fish, shellfish, mammals, and other aquatic life. Consequently, sewage pollution that enters a body of water sets off a negative cascade.
What is diversity?The definition of diversity is the quality of including or consisting of several constituents .The development of workplace diversity models since the 1960s has given rise to a strong commercial rationale for diversity. The initial paradigm for diversity in the United States was based on affirmative action and the equal opportunity employment goals put in place by the Civil Rights Act of 1964. The principle of equal employment opportunity was predicated on the notion that anybody who was intellectually or physically prepared for a particular profession might work toward (and perhaps achieve) getting the stated position without experiencing identity-based discrimination. This compliance-based strategy gave birth to the notion that the only reason a person who was different from the majority group was employed into a corporation was for show.
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determine the magnitude e(r) by applying gauss's law. express e(r) in terms of some or all of the variables/constants q , r , and ϵ0
The correct answer is E(r) = q/(4πr2ε_0)
The charge has now been extended along the z axis, so think about that scenario. Typically, this is referred to as a line charge. A line charge density is typically measured by the lambda variable, which has units of coulombs per metre (in the SI system).
The field lines must lie in planes that are perpendicular to the wire because symmetry requires that the electric field point radially outward from the wire at each point. It is recommended to utilise a cylindrical Gaussian surface with the line charge as its axis for calculating the size of the radial electric field E(r) produced by a line charge with charge density λ. The cylindrical surface's length L ought to cancel out in the expression for E. (r). The equation for E using this situation and Gauss's law (r).
E(r) = q/(4πr2ε_0)
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Because the magnetic field created by moving a current through a wire is both ___________________ and perpendicular to the wire, the field strength can be improved by ________________ the wire?
A parallel, coiling
B parallel, layering
C circular, coiling
D linear, length
Answer:I think the answer is a.
Explanation:
Because the magnetic field created by moving a current through a wire is both parallel and perpendicular to the wire, the field strength can be improved by coiling the wire, therefore the correct answer is option A.
What is a magnetic field?A magnetic field could be understood as an area around a magnet, magnetic material, or an electric charge in which magnetic force is exerted.
because coiling the wire can increase the magnetic field's intensity because the magnetic field produced by running a current through a wire is both parallel to and perpendicular to the wire.
Thus, the correct answers are parallel and coiling respectively, therefore the correct answer is option A.
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a person in good physical condition can put out 103 w of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. neglecting any problems of generator efficiency and practical considerations such as resting time: how many people would it take to run a 3.20–kw electric clothes dryer? (you do not need to enter any units.)
It will take exactly 32 persons to run a 3.20 KW electric clothes dryer
We have a person in good physical condition and can put out 103 W of useful power for several hours at a stretch.
We have to determine how many people would it take to run a 3.20 KW electric clothes dryer.
What is Power ?The rate of doing work is called Power. Mathematically -
P = [tex]$\frac{dW}{dt}[/tex]
According to the question -
A single person can generate 103 W of power.
Power needed by electric clothes dryer - 3.20 KW = 3.20 x 1000 =
3220 W
Therefore, the number of individuals required will be -
n = [tex]$\frac{3220}{103}[/tex] = 31.26 = 32 Persons
Hence, it will take exactly 32 persons to run a 3.20 KW electric clothes dryer.
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hoover dam is about 180 m180 m high, measured from its low‑water surface to the crest of the dam, and about 380 m380 m long. assume that the dam is filled to 85�% of its full height. estimate the total hydrostatic force ????f on the hoover dam.
The total hydrostatic force on the hoovar dam = f=41.56 GN
Dam filled upto height =83% of 180 m =83/100 *180 =149.4 m
Hydrostatic power p= xpg
force acting on dam f= pressure *area =∫p da
=∫₀¹⁴⁹°⁴(xpg) (380dx)
=380pg∫₀¹⁴⁹°⁴xdx
=380*1000*9.8[x²/2]₀¹⁴⁹°⁴
f=380*9.8*1000/2[(149.4)²-0²]
f=4.156*10¹⁰ N
f=41.56 GN
The net hydrostatic pressure (hp) is the hydrostatic pressure in the __________ minus hydrostatic pressure in the __The net hydrostatic pressure (hp) is the hydrostatic pressure in the capillary minus hydrostatic pressure in the interstitial fluid.
Hydrostatic strain is a power produced by the tension of liquid on the slim walls either by the blood plasma or interstitial liquid.The net hydrostatic pressure is the equilibrium of the four Starling powers and decides the net progression of liquid across the slim layer.The net hydrostatic pressure got from the amount of the four powers depicted above decides the liquid stream into or out of the narrow.Development from the circulatory system into the interstitium is inclined toward by blood hydrostatic strain and interstitial liquid oncotic pressure.On the other hand, blood oncotic pressure and interstitial liquid hydrostatic strain tend to promote development from the interstitial into the circulatory system.To know more about hydrostatic , visit :
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a swan on a lake gets airborne by flapping its wings and running on top of the water. if the swan must reach a velocity of 6.00 m/s to take off and it accelerates from rest at a constant rate of 0.350 m/s2, how far will it travel before becoming airborne?
By using uniform motion, the distance traveled by the swan is 51.43 meters.
We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
vo = 0 m/s
vt = 6 m/s
a = 0.35 m/s²
By using second equation, we can find the distance traveled by swan
vt² = vo² + 2a . s
6² = 0² + 2 . 0.35 . s
36 = 0.7 s
s = 36 / 0.7
s = 51.43 m
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starting at a position of 0 m, if the man is moving at a constant velocity of 2 m/s, it will take seconds for him to reach a position of 12 m.
The calculated time is 6 seconds.
Time is defined by physicists as the flow of events from the past through the present and into the future. In essence, a system is timeless if it is unchanging. When describing events that take place in three-dimensional space, time can be thought of as the fourth dimension of reality. Even if time isn't directly connected to energy, it is undoubtedly connected to many other components of energy. For instance, the movement of energy across the universe can affect the direction of time (from the past to the future).
V= 2 m/s
d=12 m
t=?
we know that velocity=displacement / time
time= displacement / velocity
= 12/2
=6 seconds
the calculated time is 6 seconds.
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An atom has an electron in a state with = 5 and = -4. how many distinct values of the orbital quantum number would be compatible with this?
As you recognize , each electron features a unique set of quantum numbers that describes its exact location in an atom.
Specification :In your case, you're given two qunatum numbers, n, the principal quantum number, and ml , the *magnetic quantum number, and are sked to work out how many electrons can share these two quantum numbers in an atom.
The principal quantum number describes the energy state , or energy shell, on which the electron resides. Now, notice that the values the magnetic quantum number can take depend upon the value of l, the momentum quantum number.
Elaborating :For an electron that has n = 5, 4 are often l = {0 ; 1 ; 2; 3 ;4}
As you'll see, the magnetic quantum number can take values from − l all the high to l. If ml = 1, it follows that l could very easily be l = { 1 ;2 ;3; 4}
Finally, the spin quantum number, ms, which describes the electron's spin, can only take one among two values ms = {−1/2 ; + 1/2}
This means that you will have n = 5 ; l = 1 ; ml = 1 :ms = ± 1/2 n= 5 ; l = 2 ;ml=1 :ms= ± 1/2n = 5; l = 3 ;ml=1 :ms = ±1/2 n =5; l= 4 ;ml =1:ms=±1/2
Simply put, two electrons of opposite spins can share one orbital (given by ml=1) per sub shell (given by l).
Therefore, total of 9 electrons which will share those two quantum numbers.
What are the 4 quantum numbers?
In atoms, there are a complete of four quantum numbers: the principal quantum number (n), the orbital momentum quantum number (l), the magnetic quantum number (ml), and therefore the electron spin quantum number .
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The biggest challenge in making a decentralized organization function effectively is:_______
Getting purpose congruence among division managers is the main obstacle to a decentralized company functioning efficiently.
When managers of organizational subunits work to accomplish the objectives stated by upper management, goal congruence is achieved.
Goal congruence occurs when individuals across various organizational levels have the same objective. A well-planned organizational structure results in goal congruence and enables an organization to cooperate to carry out a strategy.
In conclusion, goal congruence is a crucial tool for all organizations to use in order to accomplish their stated objectives. Congruent goals ensure that the organization's strategic goals are met and that all personnel are coordinated and motivated.
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If the density of water a given temperature and pressure is 1000 kg/m^3, what is the specific volume of the water?
The specific volume of the water with a density of 1000 kg/m^3 is: 0.001 m^3/kg
The specific volume formula and the procedure we will use is:
v = 1/ρ
Where:
v= specific volumeρ= densityInformation about the problem:
ρ= 1000 kg/m^3v= ?Applying the specific volume formula we get:
v = 1/ρ
v = 1/1000 kg/m^3
v = 0.001 m^3/kg
What is density?It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.
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2.) _____ is the measurement of kinetic energy (1 point)
Kinematics is referred to as the measurement of kinetic energy.
What is Kinematics?This is referred to as a branch of mechanics which is involved in how objects move in an area and is usually done with the use of different methods such as the use of words, diagrams etc. This is used in the study of the motion without any reference to the force which acts on the body.
On the other hand, kinetic energy is referred to as the energy which is possessed by virtue of its motion while potential energy is the energy possessed by a body by virtue of its position.
The unit of Kinetic energy is Joules and kinematics uses different parameters in the determination of its value such as velocity, acceleration which indicates motion to various extent which is therefore the reason why kinematics was chosen as the most appropriate choice.
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The energy of a photon is _____ proportional to its frequency. a high-energy photon has a _____ frequency and a _____ wavelength.
The energy of a photon of light is directly proportional to its frequency, a ahigh-energy photon has a higher frequency and a short wavelength.
What is wavelength?The length that a periodic wave repeats over in space is referred to as its wavelength in physics.
It is a characteristic of both traveling waves and standing waves as well as other spatial wave patterns. It is the separation between two successively related wave points of the same phase, such as two close-by crests, troughs, or zero crossings. The inverse of the wavelength is known as the spatial frequency. It's commonly represented by the Greek letter, or "wavelength." Also usually referred to as having a wavelength are the sinusoidal wave envelopes, modulated waves, and waves produced by the interference of several sinusoids.
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9. A metal coin has certain properties that can be measured. Which property of a coin is different on the moon than it is on Earth? C F a. mass b. weight c. volume d. density
Answer:
the weight is different on the moon
Explanation:
a plane flies 400 km east from city a to city b in 45.0 min and then 980 km south from city b to city c in 1.50 h. (assume the x axis points east and the y axis points north.) (a) in magnitude-angle notation, what is the plane's displacement for the total trip?
The plane's displacement for the total trip is, -63.2°.
Velocity, v = x/t
Vx = 459 km/2.483 hr = 184.8 km/h
Vy = -909 km/2.483 hr = - 366 km/hr
Magnitude, v =sqrt(Vx^2 + Vy^2) = 410 km/hr
Direction, theta = arctan (-366/184.8) = - 63.2°
What is in plane displacement?Double symmetrical illumination of the object, successively for each illumination direction, is used to measure in-plane displacement as the loading is gradually increased. The impact response of structures is significantly impacted by the in-plane displacements at the supports.
This is so that axial membrane forces along the beam's center line can be introduced by the development of geometrical modifications. Given that the double-hull specimen should have been strengthened by sturdy brackets at the boundaries of the outer and inner plates, this anomaly is likely the result of insufficient experimental restrictions (top and bottom plates).
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a student is driving at a speed of 45 mph on us 1 when he glances at his cell phone for 4.0 seconds to see who s calling him. how far, approximately, did he travel while looking at his cell phone?
Approximately, the student traveled 80.4672 m while looking at his cell phone.
What do you mean by distance?While distance and displacement appear to signify the same thing, they actually have very different definitions and meanings. A scalar quantity known as distance measures "how much ground an object has traversed" while moving. An object's total change in position is referred to as displacement, a vector variable that measures "how far out of place an object is." Therefore it can be understood that distance measures the length between two objects without describing its direction. Hence distance is a scalar quantity(having no direction, it only has magnitude)
45 mph = 0.0201168 kmps
So distance covered in 1 sec is 0.0201168 km
So distance covered in 4s is 4 * 0.0201168 = 0.0804672km = 80.4672m
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The planets never travel in a straight line as they orbit the sun. according to newton's second law of motion, this must mean that _________.
The planets never travel in a straight line as they orbit the sun. according to newton's second law of motion, this must mean that the force is acting on the planets.
What newton's second law of motion?Newton's subsequent regulation is a quantitative depiction of the progressions that a power can create on the movement of a body. It expresses that the time pace of progress of the energy of a body is equivalent in both extent and heading to the power forced on it. The force of a body is equivalent to the result of its mass and its speed. Force, similar to speed, is a vector amount, having both greatness and bearing. A power applied to a body can change the size of the energy or its heading or both. Newton's subsequent regulation is one of the main in all of material science. For a body whose mass m is consistent, it tends to be written in the structure F = mama, where F (force) and a (speed increase) are both vector amounts. On the off chance that a body has a net power following up on it, it is advanced quickly as per the condition. On the other hand, on the off chance that a body isn't sped up, there is no net power following up on it.
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Write the net ionic equation for the precipitation reaction that occurs when aqueous magnesium chloride is mixed with aqueous sodium phosphate. Be sure to include the physical states of all species.
Ionic equation is
[tex]Na^{+} _{3}[/tex](aq) + 2[tex]PO^{3+} _{4}[/tex](aq) + 3[tex]Mg^{+2}[/tex](aq) + 3[tex]Cl^{-} _{2}[/tex] -----> Mg([tex](PO_{4} )_{2}[/tex](s) + 3[tex]Na^{+}[/tex](aq) + 3[tex]Cl^{- }_{2}[/tex](aq)
Here the reaction of aqueous magnesium chloride is mixed with aqueous sodium phosphate.
i.e., Mg[tex](Cl)_{2}[/tex] react with [tex]Na_{3}PO_{4}[/tex]
Here the reaction is the replacement reaction, so when both magnesium chloride reacts with sodium phosphate it forms magnesium phosphate and sodium chloride.
Mg[tex]Cl_{2}[/tex] (aq) + [tex]Na_{3} PO_{4}[/tex] (aq) -------> [tex]Mg_{3} (PO)_{4}[/tex] (s) + Na[tex]Cl_{2}[/tex] (aq)
And the ionic equation is:
[tex]Na^{+} _{3}[/tex] (aq) + 2[tex]PO^{3-} _{4}[/tex] (aq) + 3[tex]Mg^{2+}[/tex](aq) + 3 [tex]Cl^{-}_{2}[/tex](aq)-------> [tex]Mg_{3}(PO_{4} )_{2}[/tex](s) + 3[tex]Na^{+}[/tex](aq) + 3 [tex]Cl_{2}^{-}[/tex](aq)
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What is the appropriate equation for how fast an object freely falls from a position of rest?
Answer:
Explanation: v = v₀ + gt = 0 + 9.80665 * 8 = 78.45 m/s
Based on the positions of sodium and potassium in the table,Tracy can predict that sodium
Answer:
-has many of the same properties as potassium.
Explanation:
four identical metallic spheres with charges of +5.0 µc, +4.2 µc, −3.8 µc, and −2.8 µc are placed on a piece of paper. the paper is lifted on all corners so that the spheres come into contact with each other simultaneously. the paper is then flattened so that the metallic spheres become separated. (a) what is the resulting charge on each sphere? 0.65 correct: your answer is correct. µc (b) how many excess or absent electrons (depending on the sign of your answer to part (a)) correspond to the resulting charge on each sphere? -4.0625e13 incorrect: your answer is incorrect. what is the charge of an electron/proton? electrons are ---select---
Four identical metallic spheres with charges of +8.6 UC, +5.0 PC, -4.2 pc, and -5.6 UC are placed on a piece of paper. The paper is lifted on all corners so that the spheres come into contact with each other simultaneously.
What are metallic spheres?It was a cause single to help charged programmer Gary McKinnon, yet it turned into the springboard for additional cooperation one year after the fact, after Circle principal man Dr. Alex Paterson, became involved. Metallic Circles is the outcome, a 49-minute odyssey that is purposefully separated into just two tracks. This is just valid for a metallic circle. A metallic circle has the property that there can be no static electric field inside it. Consequently, by Gauss' regulation there can be no charge inside it by the same token. The metal liner is utilized as a hindrance against pervasion. Instances of such COPV circles are clear in the accompanying picture where their surfaces are quite stringy by all accounts. Space circle tracked down in Spain.
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this problem checks that you can correctly apply coulomb's law for point charges, . two point-like particles separated by 2 cm have charges
The electrostatic force between the charges is 11.25 x [tex]10^{-11} \;\mu N[/tex].
We have two charges separated by some distance apart.
We have to calculate the magnitude of the force exerted on the charges due to the electromagnetic interaction in μN (10-6 Newtons).
What is the formula to calculate the electrostatic force between two point charges ?The force between two point charges is -
F = [tex]$\frac{1}{4\pi \epsilon_{o} } \frac{qQ}{r^{2} }[/tex]
According to the question -
Q =5 nC = 5 x [tex]10^{-9}[/tex] C
q = 1 nC = [tex]10^{-9}[/tex] C
r = 2 cm = 0.02 m
The force of repulsion between the charges is -
[tex]$\frac{1}{4\pi \epsilon_{o} } \frac{qQ}{r^{2} }[/tex]
[tex]$F =9\times 10^{9} \times \frac{5\times 10^{-9}\times 10^{-9} }{(0.02)^{2} }[/tex]
F = 11.25 x [tex]10^{-5}[/tex] Newtons.
Now , in micro - newtons →
F = 11.25 x [tex]10^{-5} \times 10^{-6}[/tex] = 11.25 x [tex]10^{-11} \;\mu N[/tex].
Hence, the electrostatic force between the charges is 11.25 x [tex]10^{-11} \;\mu N[/tex].
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[ The given question is not complete. The complete question is -
" Two point-like particles separated by 2 cm have charges q1=5 nC and q2=1 nC. Note that the force felt by each charge due to the other is a vector and has both a magnitude and a direction. What is the magnitude of the force exerted on the charges due to the electromagnetic interaction, in μN (10-6 Newtons)? " ]