In deriving the axial electric field for the ring-shaped charge distribution and the electric field from a long line of charge, the component perpendicular to the resulting field is zero because of what physical property? In deriving the axial electric field for the ring-shaped charge distribution and the electric field from a long line of charge, the component perpendicular to the resulting field is zero because of what physical property? positive and negative charges cancel symmetry only net charge is important superposition integration

Answer:

....................

Answer:

20

Explanation:

40/2.0=20.......

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Answer:a

Explanation:

The formation of salt takes place by the sharing of positive ions from a base and negative ions from an acid. Hence, option (a) is correct.

The given problem is based on the concept and fundamentals of Neutralization. The process of neutralization is the name given to the chemical reaction between that takes place between the acid and base.

Thus, we can conclude that the formation of salt takes place by the sharing of positive ions from a base and negative ions from an acid. Hence, option (a) is correct.

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Answer:

a reaction between an acid and a base

Explanation:

Answer:

The answer is A. A reaction between an acid and a base

Explanation:

Answer:

transmission:  the act or process by which something is spread or passed from one person or thing to another

reflection: when light from an object is reflected by a surface, it changes direction. It bounces off the surface at the same angle as it hits it. Smooth, shiny surfaces such as mirrors and polished metals reflect light well.

refraction: change in direction of a wave passing from one medium to another or from a gradual change in the medium

diffraction: various phenomena that occur when a wave encounters an obstacle or opening

Answer:

the type of tire and the type of fuel

Explanation:

Answer:

gravity

Explanation:

Answer:

ome acid rain occurs naturally, but sulfur dioxide and nitrogen oxide emissions from smokestacks combine with rain to make sulfuric and nitric acid in amounts that harm the environment. The region of the United States most harmed by acid rain is the East Coast, including the Appalachian Mountains and the Northeast.

Explanation:

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Answer:

i like trains 45654

Explanation:

Answer:

A) aₓ = -0.717 m / s² ,  B)  a_{y} = -1.024 m / s², C) x = 11.77 m , D) y = -4.6 m ,

E)  d = 12.64 m

Explanation:

For this exercise we will use trigonometry to decompose the acceleration, we are told that

   a = 1.25 m /s²   with an angle tea = 125º in a clockwise direction

A) cos θ = aₓ / a

       aₓ = a cos θ

       aₓ = 1.25 cos (-125)

       aₓ = -0.717 m / s²

B)  sin θ = [tex]a_{y}[/tex] / a

     a_{y} = a sin θ

     a_{y} = 1.25 sin (-125)

    a_{y} = -1.024 m / s²

C) The displacement component

     x = v₀ₓ t + ½ aₓ t²

let's calculate

      x = 5 3 + ½ (-0.717) 3²

      x = 11.77 m

D) the y component of the displacement

      y = [tex]v_{oy}[/tex] t + ½ [tex]a_{y}[/tex] t²

in this case the initial velocity is zero

      y = 0 + ½ (-1,024) 3²

      y = -4.6 m

E) Let's use the Pythagorean theorem

     d =√ (x² + y²)

     d = √ (11.77² + 4.6²)

     d = 12.64 m

Answer:

A and D

Explanation:

Answer:

465 N,East ............

Answer:

it acceleration 7.2m/s²

Explanation:

mass of object = 50kg

force of object = 360N

acceleration = ?

Force= mass × acceleration

acceleration = force/mass

acceleration = 360N/50Kg

acceleration = 7.2m/s²

it accelerate 7.2 m/s²

Answer: B. The resulting current is the difference of the two and has the direction of the larger current.

Explanation: Superposition Theorem states that the result in a particular branch of a linear circuit when a variety of sources are acting at the same time equals the sum of the response of each particular source acting at a time, i.e., if sources are acting on a line circuit, the resulting current in any branch is the sum of all the currents produced if each source is producing it by itself.

To solve by this method:

1) Find current in a particular branch considering one only independent source and deactivating the others;

2) Repeat the first step for all the sources in the circuit;

3) Add all the results: If the current obtained is in the same direction, add them; If it's in the opposite direction, subtract them and obtain the net current;

Therefore, when using superposition, if one current is in one direction and the other produced by other source is in the opposite direction, the net current is the difference between the two abd has the direction of the larger current.

Answer:

b  16 m/s².

Explanation:

Hello.

In this case, the force exerted to the mass of 400 kg at an acceleration of 4 m/s² is:

[tex]F=400kg*4m/s^2=1600N[/tex]

Now, since the mass is decreased to 100 kg (1/4 of 400 kg), and the force remain the same, the new acceleration should be:

[tex]a=\frac{F}{m}=\frac{1600kg*m/s^2}{100kg}\\ \\a=16m/s^2[/tex]

Thus, the answer is b  16 m/s².

Best regards.

Answer:

"When face is placed between the concave mirror and its focus, it produces a magnified image. This enlarged image of face is helpful in makeup as even pores of skin are clearly visible."

The velocity of the nitrogen molecule immediately after the collision (in km/s) is -0.5064 km/s.

When there is no external force acting on the system, the initial momentum before collision is equal to the final momentum after collision.

According to the momentum conservation principle,

m₁u₁ +m₂u₂ =m₁v₁ +m₂v₂

here, u represents the initial velocities, v represents final velocities and m represents the masses.

Given is the mass of nitrogen molecule, m₁ =28u =28 x 1.66×10⁻²⁷kg = 46.48 x 10⁻²⁷kg

the mass of water molecule, m₂ =18u =18 x 1.66×10⁻²⁷kg = 29.88 x 10⁻²⁷kg

initial velocity of nitrogen molecule u₁ = 0.4390 km/s

initial velocity of water molecule u₂ = -0.7690 km/s

final velocity of water molecule v₂ = 0.7016 km/s

Substituting the values into the above expression, we get the final velocity of the nitrogen molecule

46.48 x 10⁻²⁷kg x 0.4390 km/s + 29.88 x 10⁻²⁷kg x (-0.7690 km/s) = 46.48 x 10⁻²⁷kg x v₁ +  29.88 x 10⁻²⁷kg x  0.7016 km/s

v₁ = -0.5064 km/s

Thus, the final velocity of nitrogen molecule is -0.5064 km/s (to left).

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Answer:

Reservoir.

Explanation:

Answer:

Gravity

Explanation:

Due to earths gravity, anything that goes into the air returns back to the surface unless it is given the ability to fly.

Hope this helps!

Answer:

i had this question as well!

Explanation:

Answer:

1. to the Mystic 2. A Theme or social value 3. Something that can be valued 4. Can’t be observed/ Noticed.

Explanation:

Answer:

It’s D

Explanation:

The cells from mitosis are identical to each other and to the parent cell, but the cells from meiosis are not identical to each other or the parent cell. Hence, option (A) is correct.

Chromosome replication and equitable distribution between the two daughter cells occur during the cell division process known as mitosis. Each daughter cell has the same number of chromosomes as the parent cell, making them diploid. Thus, mitosis is sometimes referred to as equational division.

Meiosis is a type of cell division that describes how germ cells divide, resulting in the fission of two nuclei. The two nuclear fissions, known as meiosis 1 and meiosis 2, result in the formation of four sex cells known as gametes. The number of chromosomes in each sex cell is divided in half from that of the parent cell. This type of cell division happens during reproduction when one cell divides into four haploid daughter cells. The nucleus divides into four daughter cells, or nuclei.

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Answer:Type of metal

Explanation:Basically certain types of metal may heat and get cold faster maybe the alumm may collect more sun and heat more and stay that way

Due to the higher thermal conductivity of aluminium, it has higher temperature than gold.

The ability of a material to conduct or transport heat is referred to as thermal conductivity.

Here,

It is not the solid itself that moves in bulk as a result of thermal conductivity; rather, it is molecular agitation and contact.

A region of high temperature and high molecular energy is moved towards a region of lower temperature and lower molecular energy via a temperature gradient.

The density of aluminium is small. It is easily castable, machinable, and formable, and it has a high thermal conductivity and great corrosion resistance.

At 20 °C, gold has an electrical resistivity of 0.022 micro-ohm m and a thermal conductivity of 310 W m-1 K-1.

Aluminium conducts more heat than gold.

Hence,

Due to the higher thermal conductivity of aluminium, it has higher temperature than gold.

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Given parameters:

Mass of block = 5kg

Coefficient of friction = 0.5

g = 10m/s²

Unknown

Minimum force F required to hold the block =?

Solution:

Frictional force is a force that opposes motion.

The minimum force required to hold the block to the wall is the frictional force.

   Frictional force  =  uN

  Where u is coefficient of friction

              N is the normal force

      N = mg

where m is the mass of the body

          g is the acceleration due to gravity

 So,

         Frictional force = umg

                                   = 0.5 x 5 x 10

                                    = 25N

The force required here is 25N

Answer:

The limitations of this this model is the amount of wind being blown to effect the airplane.

Answer:  Highly skilled workers are necessary to run the wind tunnel.

Explanation: I took the quiz on A pex.

Answer:

1. Initial vertical velocity its 0m/s

2. 2.47 seconds

3. 10.12 m/s

4.10.12 m/s

Explanation:

Remember that we have here two parts of a problem, first we know that the ball made a free fall of 30 meters, since the ball was hit horizontally and doesn't state otherwise the vertical velocity is 0. To calculate the time we just use 30 m as our Height and use the formula for vertical distance on free fall:

[tex]H=\frac{g*t^{2} }{2} \\[/tex]

Now we just solve for time:

[tex]t=\sqrt{\frac{2H}{g} }[/tex]

With this we just insert the values we know:

[tex]t=\sqrt{\frac{2H}{g} }\\t=\sqrt{\frac{2*30}{9.81} }\\t=2.47[/tex]

Now we know that the ball was 2.47 seconds in the air, so the ball hti the ground at the second 2.47.

To calculate the velocity of the ball we just need to divide the horizontal distance covered by the time it spent on air:

[tex]v=\frac{d}{t} \\v=\frac{25}{2.47} \\v=10.12[/tex]

The final and initial horizontal velocity of the ball would be the same since nothing states otherwise, of course the hitting of the ground would decrease its velocity but since nothing is said in the problem it is not considered.

1. The initial-vertical velocity of the golf ball is equal to zero because the ball would start its motion from a stationary position (at rest).

2. The time it took the golf ball to hit the ground is 2.47 seconds.

3. The initial-horizontal velocity of the golf ball is 10.12 m/s.

4. The final-horizontal velocity of the golf ball is 10.12 m/s.

Given the following data:

1. The initial-vertical velocity of the golf ball is equal to zero because the ball would start its motion from a stationary position (at rest).

2. To determine the time it took the golf ball to hit the ground:

At maximum height, time is given by the formula:

[tex]Time = \sqrt{\frac{2H}{g} }[/tex]

Where:

Substituting the given parameters into the formula, we have;

[tex]Time = \sqrt{\frac{2\times 30}{9.8} }\\\\Time = \sqrt{\frac{60}{9.8} }\\\\Time =\sqrt{6.12}[/tex]

Time = 2.47 seconds.

3. To determine the initial-horizontal velocity of the golf ball:

[tex]Horizontal\;velocity = \frac{Horizontal\;distance}{Time} \\\\Horizontal\;velocity = \frac{25}{2.47}[/tex]

Initial horizontal velocity = 10.12 m/s.

4. To determine the final-horizontal velocity of the golf ball:

The initial-horizontal velocity and final-horizontal velocity of the golf ball would be the same.

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Explanation:

u=0 m/s

v=9.6 m/s

s= 40.5 m

a=?

V^2=u^2 +2as

9.6^2=0+2×a×40.5

92.16=81a

a=92.16/81

a=1.14m/s^2

Answer:

D. 60

Explanation:

Divide 300 miles by 5

Answer:

resistance = (resistivity.(l/A))

so for the 2 materials we get

r1 = resistivity.(l/r)

r2=resistivity.(2l/(r/2))

so ratio r1/r2=1/4

Explanation:

The resistance is proportional to the length and inversely proportional to the area (which is proportional to the square of the radius). Thus if we are just comparing the two (so the constants will cancel out).

r1 = l/r^2 (r squared).

r2 = (2l)/(1/2r)^2

r2 = 2l/(1/4)r^2

dividing by 1/4 is the same as multiplying to 4, so you are multiplying by 2 and then by 4, thus by 8.

Thus R2 is 8 times more than R1.

Answer:

the beakers measure in milliliters (ml)

the skinny one measures 1 ml per tick mark

the wider one measures 25 ml per tick mark

Answer:

inertia:

a tendency to do nothing or to remain unchanged.

balanced force:

When two forces acting on an object are equal in size but act in opposite directions.

unbalanced force:

When two forces acting on an object are not equal in size.