physical middle School

## Answer

**answer 1**

The capacitance of the capacitor is 6.07 * 10^-12 F.

a) Obtain the potential difference between the plates;

V=E*d

Where;

E = electric field intensity

d = distance between plates

Therefore;

V= 4*10^6 * 3.5*10^-3= 14 * 10^3 volts

b) we also know so that we can get the region from it;

E=σ/εo 和 σ = Q/A Derfor

E=Q/(A*εo)=85*10^-9/(A*8.85*10^-12)

A=85*10^-9/(8,85*10^-12*4*10^6)

=2,4 * 10^-3 metros^2

c) for the capacitance is given by:

C=εo*A/d

C=8,85*10^-12*2,4*10^-3/3,5*10^-3

=6,07 * 10^-12. sal

Learn more about capacitance: brainly.com/question/12978582

**answer 2**

Svar: a) 14*10^3V; b) 2,4*10^-3 m^2; c) 6,07*10^-12F

Explanation: To explain this, we need to consider the following expressions:

V=E*d The potential difference across the capacitor is equal to the electric field multiplied by the distance between the plates, then,

V= 4*10^6*3.5*10^-3=14*10^3 volts

We also know that the electric field in a parallel plate capacitor is given by:

E=σ/εo where σ is Q/A (tax/area)

E=Q/(A*εo)=85*10^-9/(A*8.85*10^-12)

A=85*10^-9/(8,85*10^-12*4*10^6)=2,4*10^-3 ris^2

Finally, the capacitance is given by:

C=εo*A/d

C=8,85*10^-12*2,4*10^-3/3,5*10^-3=6,07*10^-12

## Related questions

An object moves along a circular path with constant speed. What is the relationship between the velocity of an object and the direction of the acceleration vector? (a) - The velocity and acceleration vectors point in opposite directions. (b) - The velocity and acceleration vectors are perpendicular. (c) - The velocity vector points in a direction tangent to the circular path. The acceleration is zero. (d) - The velocity vector points to the center of the circular path. The acceleration is zero. (e) - The velocity and acceleration vectors point in the same direction.

### Answer

To solve this problem we need to understand the concept of acceleration.

What is acceleration?

Acceleration is defined as the rate of change of velocity with respect to time. It is given by the formula,

The relationship between the velocity of an object and the direction of the acceleration vector is perpendicular.

When an object moves in a circle, the velocity of the object is always perpendicular to the circle, therefore the velocity will be tangent to the circle. But the acceleration always points to the center of the circle because the centripetal force makes the object move in a circle.

Since the acceleration is toward the center, it is the radius of the circle, and the velocity is the tangent of the circle.

Therefore, the relationship between the velocity of an object and the direction of the acceleration vector is perpendicular.

Learn more about acceleration:

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answer:

b

explain:

When an object moves in a circle, the direction of velocity is in the tangential direction of the circle, and acceleration always points in the radial direction. This means that the velocity is always perpendicular to the acceleration of the object.

So, option (b): the velocity and acceleration vectors are perpendicular, is correct.

If a golf ball and a ping pong ball move with the same kinetic energy, can you tell which is faster? Explain with KE. Similarly, in a gas mixture of large and light molecules with the same average KE, can you see which has the greatest velocity?

### Answer

answer:

Ping-pong, light molecules go faster

explain:

The kinetic energy of an object is defined as

Where

m is the mass of the object

v is its speed

It follows that the velocity can be written as

In this problem, both the golf ball and the ping pong ball have kinetic energy K. However, the golden ball has a greater mass (about 45 g) than the table tennis ball (about 4 g): therefore, since v is inversely proportional to the square root of the mass, the table tennis ball has a greater velocity to achieve the same kinetic energy as a golf ball.

The same argument can be applied to gas mixtures: if there are more light and more massive molecules, and if they all have the same kinetic energy, then this means that the light molecules must have a higher speed, which in turn leads to The equation

A squash ball hits a wall with a speed of 30 m/s and rebounds in the opposite direction with a speed of 26 m/s. The collision takes 20 ms. What is the average acceleration of the ball when it hits the wall?

### Answer

answer:

The average acceleration of the ball during the collision with the wall is

explain:

known data

We will assume that the initial velocity has a negative direction, the final velocity has a positive direction, and the mass.

initial impulse

last push

impulses

Medium power

average acceleration

, so .

so,

A green block of mass m slides to the right on a frictionless floor and collides elastically with a red block of mass M, which is initially at rest. After the collision, the green block remains stationary and the red block moves to the right. How does m compare to M?

### Answer

answer:

rice = rice

explain:

If we say that the mass m of the green block is less than the mass M of the red block, then the green block will bounce and move to the left instead of staying still. Alternatively, if the green block's mass m is greater than the red block's mass M, the green block will keep moving to the right instead of stopping. After the collision, the red block moves to the right due to the exchange of speeds. Therefore, m=M since m stops and M moves to the right

Both planes left the airport at the same time. The first aircraft has a speed of 730 m/h and a course of 65.3°. The other has a speed of 590 m/h and a course of 102°. How far apart are they after 1.7 hours? Answer in meters.

### Answer

answer:

After 1.7 hours the plane will be 741.6959 meters away

explain:

We gave time = 1.7 hours

So if we plot the vectors of the 2D graph, we see that the angle difference is =

The speed of the first plane = 730 m/h

So the distance traveled by the first plane = 730×1.7 = 1241 m

The speed of the second plane = 590 m/h

So the distance traveled by the second plane = 590×1.7 = 1003 m

We denote these distances as the two sides of the triangle, and the distance between the planes as the side opposite angle 58.6.

Using the law of cosines to represent the distance between planes, we see:

r = 741,6959 metros

A parallel plate capacitor with a plate separation of 4.0 cm has a plate area of 6.0 × 10-2 m2. What is the capacitance of this capacitor if a dielectric material with a dielectric constant of 2.4 is placed between the plates?

### Answer

Answer: 32pF

explain:

The capacitance of a parallel plate capacitor is given by the following equation:

Where:

is the electrical constant of the dielectric material in a vacuum

is the area of each plate

is the distance between the two plates

This is the capacitance, when the dielectric is a vacuum.

Now, when we have a dielectric material with a permittivity of , we can calculate the capacitance:

finally:

What is conserved when two bodies collide in a closed system?

### Answer

Answer: impulse

explain:

Momentum (linear momentum) is defined as moving mass and is given by the following equation:

Where is the quality and speed.

Now, according to the law of conservation of momentum:

"If two bodies or bodies are in a closed system and both collide, the total momentum of the two bodies before the collision will be the same as the total momentum of the two identical bodies after the collision."

Of course, the momentum of each object can change after the collision, but the total momentum of the system cannot.

Where does the energy for nuclear fission come from?

### Answer

Answer: None

explain:

UH Huh

Who is credited with developing the theory of electromagnetic waves?

### Answer

Answer: James Clerk Maxwell

explain:

James Clerk Maxwell was the first scientist to treat electricity, magnetism, and light as different manifestations of the same phenomenon. In fact, because this association was considered a scientific milestone in his time (1860s-1870s), Maxwell is widely considered one of the greatest scientists of the 19th century.

Maxwell, a Scotsman, realized that electric and magnetic fields could combine to form electromagnetic waves (which in turn are related to light). Therefore, he summarized this relationship between electricity and magnetism and developed his theory with four equations, which are now called "Maxwell's equations".

What happens when a discharged capacitor is placed in a loop with a resistor and a battery?

### Answer

answer:

The capacitor is charged

explain:

When a capacitor is connected to a circuit consisting of a battery and a resistor, charge (electrons) will begin to flow through the circuit, driven by the electromotive force generated by the battery. especially:

- Electrons will flow from the negative pole of the battery to a plate of the capacitor.

- Electrons will flow from the second plate of the capacitor to the positive pole of the battery.

(It is important to remember that electrons never move through the space between the plates of a capacitor.)

Therefore, the negative charge will accumulate on one plate of the capacitor and the positive charge will accumulate on the other plate: therefore the potential difference between the plates of the capacitor will increase. Due to this increasing potential difference, it becomes increasingly difficult for the battery to "push" the electrons on the negative plate (and away from the other plates), so the current in the circuit will continue to drop.

The process stops when the potential difference across the capacitor gap is equal to the electromotive force. Battery: At this point there is no more current in the circuit and the capacitor is fully charged.

What is the positive or negative charge of each nucleus?

### Answer

Answer: Protons have a positive charge.

the electrons have negative carge

explain:

Why are planets with long orbital periods the last to be discovered?

### Answer

Answer: Because observers on Earth have to wait a long time for the planet to repeat its orbit.

explain:

According to Kepler's third law of planetary motion, "the square of the period of revolution of a planet is proportional to the cube of its semi-major axis (magnitude)."

In other words, this law establishes the relationship between the orbital period of a body (moon, planet, satellite) in space around a larger body and the size of its orbit:

So, in the particular case of a planet orbiting the sun, the greater (the distance between the planet and the sun) the longer the period.

To understand it better:

This usually occurs on planets farther from the sun. Due to their longer periods, the planets take longer than the inner planets to complete a complete orbit around the Sun. So here on Earth we have to wait longer to confirm that the object has repeated its orbit.

This is the reason why astronomers and scientists wait so long to confirm that the observed objects are planets.

How much net work does a 2-kg object do when it accelerates from 0 m/s to 5 m/s?

### Answer

answer:

The net work done by a 2 kg object is

explain:

Hola

Reputation

mass, initial velocity and final velocity

Using the kinetic energy formula, , we can obtain , and .

By definition, net work is the net work done by a 2 kg object accelerating it from 0 m/s to 5 m/s.

What information is needed to determine the energy of an electron in a many-electron atom?

### Answer

Svar: Principal Quantum Number and Azimuthal Quantum Number

explain:

According to current atomic models, it has a central nucleus around which electrons orbit. These orbitals are located at different energy levels, which are related to the distance of the electron from the nucleus.

In this sense, the main quantum number identified by , provides information about the orbital energy level of the electron; while the azimuth quantum number (or orbital quantum number) determines the orbital angular momentum and describes its shape.

It should be noted that the value of always is a positive integer, for example: 1, 2, 3, 4, 5, 6, 7. Although its value theoretically fluctuates between 1 and infinity, until now only atoms with a level of maximum energy of 8. Also determine the total number of energy subshells in a given energy level, which helps determine which subshell the electron belongs to.

What scientific principle causes the different layers of the earth?

### Answer

It is gravity that is responsible for the development of the geological layers of the Earth.

We have different layers of soil.

We have identified the scientific principles that create the different layers of the Earth.

How many layers are inside the earth?

The Earth's structure is divided into four layers: crust, mantle, outer core, and inner core.

According to the question -

The reason there are different layers is because of Earth's gravity. Due to radioactive decay and gravity, molten iron ore was formed and thus a stratification of the Earth into different geological layers occurred. The migration of molten iron toward the center of the earth moves less dense material toward the surface.

Therefore, it is the gravity of the earth that causes the development of the geological layers of the earth.

To answer more questions about soil layers, visit the following links:

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#SPJ2

Answer: The stratification of the Earth in its geological layers is caused by the formation of the iron core of the Earth.

explain:

The arterial and venous ends of the capillaries have the same net osmotic pressure. Right or wrong

### Answer

Answer yes

explain:

Let's start by explaining that the cells that make up a tissue are separated from each other by a space called the interstitium. These spaces are filled with a fluid called interstitial fluid (which is nothing more than plasma from the capillaries, which has a lower protein concentration than plasma).

However, due to its large size, the proteins present in this interstitial fluid cannot easily pass through the walls of the capillaries, which are semipermeable membranes (permeable to water but not to plasma proteins). This is where osmotic pressure comes in, allowing water to enter the capillaries without allowing proteins to pass through.

In this sense, the values of the net osmotic pressure at the arterial and venous ends of the capillaries are equal.

Suppose you make the following assumption: the higher the ball falls, the faster it will travel when it hits the ground because gravity has more time to accelerate it.

If you look at two identical balls dropped from the same height, each hitting the ground with a speed of 3 m/s, does the evidence support this hypothesis?

IN.

Yes, the evidence supports this hypothesis.

B.

No, the evidence contradicts the hypothesis.

C.

The evidence has nothing to do with the hypothesis.

### Answer

answer:

IN

explain:

The answer is not B because the assumption is that the ball accelerates with time, and if the evidence contradicts that assumption, then the ball does not accelerate, which it does. The answer is not C by common sense.

The toy gun uses a spring with a constant force of 285 N/m to push a 9.5-g steel ball. Assuming that the spring is compressed 7.6 cm and that friction is negligible, answer the following questions: (a) How much force is required to compress the spring? (b) How high can the ball be thrown? (c) At what angle can a child aim at a target of the same height as the firearm at a distance of 3.00 meters? (d) What is the maximum range of the firearm at ground level?

### Answer

answer:

a) F = 21,7 N，b) h = 8,84 m，c) θ = 58,5º d) R = 15,75 m

explain:

a) Hooke's law is

x = 7,6 cm (1 m/100 cm) = 0,076 m

m = 9,5 g (1 kg / 1000 g) = 9,5 10-3 kg

F = K×

F = 285 0,076

F = 21.7 Newtons

b) We use conservation of energy

Eo = Ke = ½ kx²

Ef = U = mg t

ir = ef

½ k x² = milligrams per hour

h = ½ k x² / mg

h = ½ 285 0,076² / 9,5 10⁻³ 9,8

h = 8,84 metros

c) Let's calculate how fast the gun leaves

grams = grams

½ k x² = ½ m v²

v = √ (k/m x²)

v = √( 285 / 9,5 10-3 0,076²)

v = 13,16 m/s

v0 = v = 13.16 m/s

Since we have the horizontal distance, we can calculate the travel time

x = voice t

t = sonido / x

t = vo cos θ / x

t = 13.16 cos theta/3

t = 4.39 cos theta

y = t - ½ g t²

0 = vo sen θ t-1/2 9,8 t²

0 = 13,16 sin θt-4,9t2

0 = 13.16 sen θ (4.39 cos θ) - 4.9 (4.39 cos θ)²

0 = 57.78 sen θ cos θ - 94.43 cos² θ

0 = 57.78 sen θ - 94.43 cos θ

tanθ = 94,43 / 57,78

θ = 58.5º

d) The maximum range is

R = vo² sen 2θ/g

R = 13.16² sen 2 58.5 /9.8

R = 15,75 metros

A student weighing 700 N climbs to the top of an 8-m vertical rope with constant speed in 10 seconds. Students disperse the nearest average power against gravity at 1.1 W

87.5 watts

560 watts

875 watts

5600 watts

### Answer

answer:

The average power used by the student to overcome gravity is 560W, a watt is a unit of work, that is, joule/time or kilogram*/

explain:

Pesos = 700N

Power is the work done in (joules) or (N*m) within a certain time (s) to do the work in unit of watts (W)

An astronomer has observed that the wavelengths of light from distant stars shift toward the red part of the visible spectrum. Which of the following is true? - The distance between the Earth and the stars is getting smaller. - The distance between the Earth and the stars remains constant. - The distance between the Earth and the stars is increasing.

### Answer

Changes can be observed due to the effect of electromagnetic waves. The setting "The distance between the Earth and the stars increases" is correct.

What is a wavelength?

The distance between two successive troughs or peaks is called the wavelength. A crest is the highest point and a trough is the lowest point.

Since the electromagnetic radiation has been blueshifted, this means that it is getting closer to us, causing the light waves it produces to come closer and also decrease in wavelength towards the blue.

The Doppler effect describes the phenomenon of changes in wavelength and frequency caused by motion.

Changes can be observed due to the effect of electromagnetic waves. "The distance between the Earth and the stars is increasing."

So "the distance between the Earth and the stars is increasing." This option is correct.

For more information on wavelengths, see the link;

brainly.com/question/7143261

answer:

The distance between Earth and the stars is increasing.

explain:

When we look at an object, its electromagnetic radiation is shifted towards the blue, which means that it is getting closer to us, which causes the light waves it emits to be closer together and the wavelength decreases towards the blue direction, which is called the blueshift. .

Instead, when an object is moving rapidly away from us, the light waves or electromagnetic radiation it emits have been stretched from normal wavelengths to longer wavelengths, toward the red part of the spectrum. This is called a redshift.

This change in wavelength and frequency due to motion (whether the light source is moving closer or further away) is described by the Doppler effect.

So in this case, because the light we perceive from the star has shifted into the red part of the visible spectrum, we can conclude that it is moving away from Earth and that the distance between the star and Earth is increasing.

## FAQs

### How do you find the total charge on a parallel plate capacitor? ›

The amount of charge that moves into the plates depends upon the capacitance and the applied voltage according to the formula **Q=CV**, where Q is the charge in Coulombs, C is the capacitance in Farads, and V is the potential difference between the plates in volts.

**What is the charge on each plate of parallel plate capacitor? ›**

The two plates of parallel plate capacitor are of equal dimensions. They are connected to the power supply. The plate, connected to the positive terminal of the battery, acquires a positive charge. On the other hand, the plate, connected to the negative terminal of battery acquires a negative charge.

**What is the capacitance of a parallel plate capacitor with separation of 4mm? ›**

The capacitance of a parallel plate condenser with a separation of 4 mm between the plates is **7μF**.

**Does a parallel plate capacitor carries a charge? ›**

Two plates of a parallel plate capacitor carry charges **q and -q** and are separated by a distance a from each other. The capacitor is connected to a constant voltage source V0. The distance between the plates is changed to x+dx. Then in steady state.

**What is parallel plate capacitor formula? ›**

The parallel plate capacitor formula is given by:

**C = k ϵ 0 A d**. Where, ϵ_{o} is the permittivity of space (8.854 × 10^{−}^{12} F/m) k is the relative permittivity of dielectric material. d is the separation between the plates.

**What is the formula for parallel capacitors? ›**

Capacitors in Parallel

This is shown below. To calculate the total overall capacitance of a number of capacitors connected in this way you add up the individual capacitances using the following formula: **CTotal = C1 + C2 + C3** and so on Example: To calculate the total capacitance for these three capacitors in parallel.

**How do you calculate the charge of a capacitor? ›**

Q=CV(1−e−t/(RC)). Thus the charge on the capacitor asymptotically approaches its final value CV, reaching 63% (1 - e^{-}^{1}) of the final value in time RC and half of the final value in time RCln2=0.6931RC.

**How to calculate capacitance? ›**

This calculates the capacitance of a capacitor based on its charge, Q, and its voltage, V, according to the formula, **C=Q/V**.

**What is the charge of each capacitor in parallel? ›**

When wired in parallel, each capacitor gets the same voltage. The charge on one of them is then independent of the others being present, so the total charge is **Q=V(A+B+C)**.

**What will happen to the capacity of a parallel plate capacitor? ›**

The capacity of a parallel plate air capacitor is **decreased by filling the space between the capacitor plates by mica dust**.

### What is the capacity of a parallel plate capacitor condenser? ›

The capacity of a parallel plate capacitor is given by **C = K ϵ 0 A d**. Where, K is the relative permittivity of dielectric material.

**Why is charge constant in parallel plate capacitor? ›**

For capacitors connected in parallel, the charge on each capacitor varies but the capacitors in parallel voltage is the same as the voltage source because **each capacitor is connected directly to the battery**.

**What does a parallel plate capacitor consist of 2? ›**

A parallel plate capacitor consists of **two circular plates each of radius 12cm and separated by 5.0mm**. The capacitor is being charged by an external source. The charging current is constant and is equal to 0.15A.

**What is parallel formula? ›**

Two lines are parallel lines if they do not intersect. The slopes of the lines are the same. **f(x)=m1x+b1 and g(x)=m2x+b2** are parallel if m1=m2 f ( x ) = m 1 x + b 1 and g ( x ) = m 2 x + b 2 are parallel if m 1 = m 2 . If and only if b1=b2 b 1 = b 2 and m1=m2 m 1 = m 2 , we say the lines coincide.

**How do you solve capacitor problems? ›**

**The sum of all the capacitance value in a parallel circuit equals to the total capacitance in the circuit**. This is given by the equation C_{T}=C_{1}+C_{2}+C_{3}. . For example: A parallel circuit has three capacitors of value: C_{1} = 2F, C_{2} = 3F, C_{3} = 6F. Then the total capacitance, C_{T} is 2+3+6 = 11 F.

**What is the formula to test a capacitor? ›**

Divide the total of the start wire amps times 2,652 by the voltage you just measured. This total is the capacitance. The complete formula is: **Start Winding Amps x 2,652 ÷ capacitor voltage = microfarads**.

**How do you calculate charge? ›**

It is measured in coulombs (C) and can be calculated using the formula, **Charge (C) = Current (A) x Time (s)**.

**What is the formula for the charge of a capacitor with time? ›**

Simplifying results in an equation for the charge on the charging capacitor as a function of time: **q(t)=Cϵ(1−e−t**RC)=Q(1−e−tτ).

**What are the three methods of calculating capacitance? ›**

Three different measurement methods, or variants thereof, are often employed to find the capacitance; **galvanostatic charging, cyclic voltammetry and impedance spectroscopy**.

**Does a parallel plate capacitor has a capacitance of 100? ›**

A parallel state air capacitor has capacitance of 100 **μF**. The plates are at a distance d apart. If a slab of thickness t (t≤d) and dielectric constant 5 is introduced between the parallel plates, then the capacitance can be. A parallel state air capacitor has capacitance of 100 muF.

### What happens to parallel plate capacitor if the distance is doubled? ›

Doubling the distance between capacitor plates will **increase the capacitance four times**.

**What is the capacity of the parallel plate condenser independent on? ›**

Solution. The capacity of the parallel plate condenser depends on the **separation between the plates**.

**What is the capacity of parallel plate capacitor without dielectric? ›**

The capacity of a parallel plate capacitor with no dielectric substance but with a separation of 0.4 cm is **2μF**.

**What is total charge in parallel capacitance? ›**

When wired in parallel, each capacitor gets the same voltage. The charge on one of them is then independent of the others being present, so the total charge is **Q=V(A+B+C)**.

**What is the total charge on capacitor? ›**

The total charge stored in a capacitor is **zero**.