What is a chemical change?

A. The appearance of an object changes, but its makeup remains the same.
B. One kind of matter changes into a different kind of matter with different properties. C. the process by which particles leave a liquid and become a gas.

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.

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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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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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.

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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As you recognize , each electron features a unique set of quantum numbers that describes its exact location in an atom.

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.

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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Answer:

-has many of the same properties as potassium.

Explanation:

The magnitude of the force on the 2 micro coulomb charge is 16.22mN.

Force on 2 micro coulombs by 1 micro coulomb is given as

F₁ = k · 1 × 2 × 10⁻¹²/r²

Or, F₁ = 9 × 10⁹ × 2 × 10⁻¹² /2²

Or, F₁ = 4.5 mN

Force on 2 micro coulombs by 3 micro coulomb is given as

F₂ = k · 3 × 2 × 10⁻¹²/r²

Or, F₂ = 9 × 10⁹ × 6 × 10⁻¹² /2²

Or, F₂ = 13.5 mN

As charges are placed on equilateral triangles, it means both forces will be 60 degrees separated from each other.

So, the resultant magnitude is given by

F = √F₁² + F₂² + 2F₁F₂cos60°

or F = 16.22 mN

Therefore, the magnitude of the force on the 2 micro coulomb charge is 16.22 mN.

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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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Complete Question is

A sound wave with intensity

2.0×10−3Wm2

is perceived to be modestly loud. Your eardrum is 5.9 mm in diameter. How much energy will be transferred to your eardrum while listening to this sound for 1 minute? Express answer in Joules.

The energy transferred to the human ear per minute will be : 2.909×10⁻³J.

W=Pt

  =I*A*t

  =1.9×10⁽⁻³⁾×π×(5.7×10⁽⁻³⁾)²/4×60

  =2.909×10⁻³J

the amount of power that is transported beyond a given place of the medium in keeping with unit of time is referred to as the intensity of the sound wave. The extra the amplitude of vibrations of the particles of the medium, the extra the charge at which electricity is transported through it, and the extra severe that the sound wave is.

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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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Level of measurement of the data is the average (mean) of the is: Ordinal scales.

A categorization that specifies the type of information included in the values assigned to variables is called level of measurement or scale of measure. The most well-known categorization was created by psychologist Stanley Smith Stevens and included four levels or scales of measurement: nominal, ordinal, interval, and ratio.

You may find out how accurately variables are recorded using levels of measurement, also known as scales of measurement. A variable in scientific study is something that can have various values across your data collection (e.g., height or test scores).

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Answer:

0 m/s

Explanation:

It is correct answer.

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.

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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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°

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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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.

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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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 ____.

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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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.

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.

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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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.

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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The value of frictional force is 45.6 N

The amount of resistance a steel box experiences when traveling over a steel surface

μ = 0.80

the frictional force is a result

f = μ N

= 0.80[tex]\times[/tex] 57

= 45.6 N

The force that prevents motion when the surfaces of two objects come into contact is known as friction. Friction lessens a machine's mechanical advantage, or, to put it another way, friction decreases the output-to-input ratio.

A car spends one-fourth of its energy-reducing friction. However, friction in the clutch and the tires also contribute to the vehicle's ability to maintain its position on the road.

One of the most important phenomena in the physical universe is friction, which affects everything from machinery to molecular structures to matches.

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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).

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)? " ]

Answer:

Explanation:  v = v₀ + gt = 0 + 9.80665 * 8 = 78.45 m/s

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 capillary minus hydrostatic pressure in the interstitial fluid.

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Kinematics is referred to as the measurement of kinetic energy.

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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Answer:

the weight is different on the moon

Explanation:

Approximately, the student traveled 80.4672 m while looking at his cell phone.

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 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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The average force on the bumper is 1821.455 Newtons.

                     [tex]\begin{aligned}\\\text{kinetic energy} &= \small \frac{1}{2}mv^2\\\\&=\small \frac{1050\,kg\times (0.833\,m/s)^2}{2}\\\\&=\small 364.291\,kg\,m^2/s^2\end{aligned}[/tex]

                     [tex]\begin{aligned}\\\text{work on the car} &= \small Fs\\\\&=\small F\times 0.200\,m\\\\&=\small 0.200F\, m\end{aligned}[/tex]

                               [tex]\begin{aligned}\\\small 0.200F \,m &=\small 364.291\,kg\,m^2/s^2\\\\\small F &=\small 1821.455\, N\end{aligned}[/tex]

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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 isosceles triangle with two sides of 100 cm and one of 20 cm is formed by the threads and the balls.

The electric charge particles that make up the electrostatic force behave as both an attracting and a repulsive force. It is additionally called Columb's force. Charles-Augustin de Coulomb, a French scientist, would be honored by having the Columb attraction bear his name. However, electrostatic force is one of the four fundamental forces of nature. The forces add up to zero.

F=kq2/d2 is horizontally oriented.

Straight down, the gravitational force is mg, and the thread's tension is T.

The horizontal tension balances the electrostatic field, whereas the vertical tension balances gravity.

An isosceles triangle with two sides of 100 cm and one of 20 cm is formed by the threads and the balls.

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