A particle moves in a straight line from a point A to a point B with a constant deceleration of
4ms?. At A the particle has velocity 32 m s- and the particle comes to rest at B. Find:
a the time taken for the particle to travel from A to B
b the distance between A and B.

The correct answer to this question is D) The field points in two directions at the same place. Electric field lines represent the direction of the electric field at a given point in space.

When two electric field lines cross each other, it means that at that point, the electric field has two different directions. This is only possible if there are two or more charges of different signs in the vicinity, as the electric field lines always point from positive charges to negative charges.

The presence of an electrical conductor or insulator is not relevant in this situation, as they do not affect the direction of the electric field lines. However, it is important to note that conductors can redistribute charges in a way that can affect the electric field, leading to differences in the distribution of electric field lines.

In summary, the presence of two crossing electric field lines implies the existence of at least two point charges of opposite signs. It is a fundamental concept in electrostatics and is used to explain a wide range of phenomena, including electric fields around charges and the behavior of electrical circuits.

Learn more about electric field lines here:

https://brainly.com/question/21661975

#SPJ11

Given:

A ball bouncing eventually comes to stop.

To find:

What kind of a system is this?

Explanation:

An open system is a system where the free exchange of matter and energy with the surroundings takes place.

A closed system is where only the energy of the system is shared with the surrounding. In these kinds of systems, the exchange of matter does not take place.

An isolated system is where neither matter nor energy is exchanged between the system and the surrounding.

When a ball is bouncing, it gradually loses its kinetic energy to the surroundings and eventually comes to stop. But the mass of the ball remains the same. Thus this is a closed system.

Final answer:

The given system is a closed system.

Therefore the correct answer is option B.

Explanation:

If transformations from stabilization are minimal, a double pendulum performs basic geometric motion. The highly nonlinear system, furthermore, becomes radically unstable in its motion as significant displacements are introduced, showing that deterministic processes are not inherently predictable

"The proper way to name the range of cells located in column A row 3 through column C row 7 is A3:C7."

Each worksheet is composed of countless cells, which are rectangular shapes. A cell is the place where a row and a column meet, or the intersection of a row and a column.

A, B, and C are used to identify columns, while digits are used to identify rows (1, 2, 3). Based on its column and row, each cell has a unique name or cell address. The cell address in the example below is C5, because the chosen cell intersects column C and row 5.

Additionally, it is possible to select many cells at once. A cell range is a collection of cells. You will refer to a cell range using the cell addresses of the first and last cells in the range, separated by a colon, rather than a single cell address. Cells A1, A2, A3, A4, and A5 would be included in the range represented by the letters A1:A5.

To know more about cells:

https://brainly.com/question/18722277

#SPJ4

Answer:

V= 5.3 Km/hr

Explanation:

Got the answer from class today

hope it helps :)

The electric field at the surface of the atom is E = 1/(4πR²) * (e/ε₀). At the surface of an atom, the value of the electric field (e) is dependent on the charge of the atom's nucleus and the arrangement of its electrons.

The electric field is defined as the force experienced by a unit charge at a certain point. At the surface of an atom, the electric field can be expressed as a multiple of e/ϵ0, where e is the elementary charge and ϵ0 is the permittivity of free space. The exact value of the electric field at the surface of an atom depends on the specific atom and the conditions it is in. However, it is generally very weak and only detectable through specialized techniques such as scanning tunneling microscopy.
It appears that you're asking about the electric field (E) at the surface of an atom. To calculate this, we'll consider the atom as a uniformly charged sphere.

1. Define the quantities: Let e represent the elementary charge (1.6 x 10^-19 C), ε₀ represent the vacuum permittivity (8.85 x 10^-12 C²/Nm²), and R be the radius of the atom.

2. Calculate the total charge (Q) on the atom: As an example, let's assume we have a positive ion with one missing electron. Therefore, Q = e.

3. Use the electric field formula for a charged sphere: E = Q/(4πε₀R²)

4. Substitute the given values: E = e/(4πε₀R²)

5. Express E as a multiple of e/ε₀: Divide both sides of the equation by e/ε₀:

E/(e/ε₀) = (e/(4πε₀R²)) / (e/ε₀)

6. Simplify the expression: E/(e/ε₀) = 1/(4πR²)

Thus, the electric field at the surface of the atom is E = 1/(4πR²) * (e/ε₀).

For more information on permittivity visit:

brainly.com/question/30403318

#SPJ11

Answer:

Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.

The boundary created between the solar wind and the interstellar wind is called the heliopause.

Heliopause is a shock wave that forms when the solar wind encounters the interstellar medium. The solar wind is a stream of charged particles that flows out from the Sun. The interstellar medium is a thin gas that fills the space between stars. When the solar wind encounters the interstellar medium, it is slowed down and compressed. This creates a shock wave, which is the heliopause.

The heliopause is a very important region of space. It is the boundary between the Sun's influence and the rest of the galaxy. It is also a very dynamic region. The solar wind and the interstellar medium are constantly interacting, which creates a variety of phenomena, such as comets, auroras, and cosmic rays.

Find out more on solar wind here: https://brainly.com/question/30245481

#SPJ1

The work that must be supplied to the refrigerator for it to reject 1000 kj of heat to the room it is placed is 625 kj.

A refrigerator works by absorbing heat from inside and rejecting it to the outside environment. The coefficient of performance (COP) is a measure of its efficiency and is defined as the ratio of the heat removed from the refrigerator to the work supplied to it. In this case, the COP of the refrigerator is given as 1.6.

To find out how much work must be supplied to the refrigerator for it to reject 1000 kj of heat to the room, we can use the equation:

COP = Qc / W

where Qc is the heat rejected to the room and W is the work supplied to the refrigerator.

Rearranging the equation, we get:

W = Qc / COP

Substituting the given values, we get:

W = 1000 kj / 1.6

W = 625 kj

Therefore, the work that must be supplied to the refrigerator for it to reject 1000 kj of heat to the room it is placed is 625 kj. This means that the refrigerator is capable of transferring 1000 kj of heat from inside to outside by consuming 625 kj of work, making it an efficient cooling system.

For more such questions on Work.

https://brainly.com/question/14920200#

#SPJ11

A 200.0 lb pumpkin is dropped from the roof of a 5-story (15 m) building. assuming it starts from rest and ignoring drag forces, with what speed does it impact the ground below is as follow:

The potential energy (P.E.) of an object is the energy it has due to its place, and the higher the object's height, the more potential energy it has. As a result, the pumpkin, with a weight of 200.0 lb, is at a height of

5 x 3.28 = 16.4 meters.

Its gravitational potential energy is equal to the product of the mass of the object, the acceleration due to gravity (9.8 m/s²), and its height above the ground. The gravitational potential energy can be calculated as follows:

Gravitational Potential Energy = mgh

where m is the mass, g is the acceleration due to gravity, and h is the height above the ground.

So, Gravitational Potential Energy

= (200.0 lb) x (1 kg/2.2 lb) x (9.8 m/s²) x (16.4 m)

= 1.867 kJ (rounded to three significant figures)

Now, we know that all of this potential energy will be transformed into kinetic energy (K.E.) when the pumpkin is released and starts falling. The kinetic energy formula is:

K.E. = ½mv²

where m is the mass of the object, and v is the velocity (speed) of the object.

Using the above formula, we can calculate the velocity (speed) of the pumpkin when it reaches the ground below.

K.E. = P.E. (since potential energy equals kinetic energy)

½mv² = mgh

We'll substitute in the numbers we've computed so far and solve for v.

v = √(2gh)

Where v is the speed, g is the acceleration due to gravity, and h is the height above the ground.

So, v = √(2gh) = √(2 x 9.8 m/s² x 16.4 m) = 18.2 m/s (rounded to two significant figures)

Therefore, the speed with which the pumpkin strikes the ground is 18.2 m/s.

To know more about speed visit:

https://brainly.com/question/13943409

#SPJ11

Answer:

260 km/h

Explanation:

Motion is said to be relative when the motion observed by the observer depends on the location (frame) of the observer.

When two objects are moving in opposite directions, the relative motion is obtained by subtraction.

Hence  the plane is moving at (285 - 25) km/h giving 260 km/h

Answer:

Pick something up with your hand and drop it. When you release it from your hand, its speed is zero. On the way down its speed increases. The longer it falls the faster it travels. Sounds like acceleration to me.

But acceleration is more than just increasing speed. Pick up this same object and toss it vertically into the air. On the way up its speed will decrease until it stops and reverses direction. Decreasing speed is also considered acceleration.

But acceleration is more than just changing speed. Pick up your battered object and launch it one last time. This time throw it horizontally and notice how its horizontal velocity gradually becomes more and more vertical. Since acceleration is the rate of change of velocity with time and velocity is a vector quantity, this change in direction is also considered acceleration.

In each of these examples the acceleration was the result of gravity. Your object was accelerating because gravity was pulling it down. Even the object tossed straight up is falling — and it begins falling the minute it leaves your hand. If it wasn't, it would have continued moving away from you in a straight line. This is the acceleration due to gravity.

In this initial experiment the bowling ball drops straight to the ground whereas the feathers float, owing to air resistance.

He alludes to the earlier experiment by Galileo that tested the same hypothesis.

"Galileo’s experiment was simple," he explains. "He took a heavy object, and a light one, and dropped them at the same time to see which fell fastest."

Although Galileo’s experiment proved two similarly shaped objects would fall at the same speed despite being different weights, he didn’t have access to a vacuum chamber in the 17th Century to conduct Professor Cox's more extravagant experiment.

Professor Cox also used the bowling ball and feather to prove a hypothesis put forward by Albert Einstein.

His Special Theory of Relativity argued that items would not be falling but standing still due to lack of force acting on them.

"Isaac Newton would say that the ball and the feather fall because there’s a force pulling them down: gravity,’ Professor Cox said.

"But Einstein imagined the scene very differently.

"The “happiest thought of his life” [as Einstein called it] was this; the reason the bowling ball and the feather fall together is because they’re not falling.

"They’re standing still. There is no force acting on them at all.

"He reasoned that if you couldn’t see the background, there’d be no way of knowing that the ball and the feathers were being accelerated towards the Earth.

"So he concluded they weren’t."

The tweaking of Newton’s earlier theory enabled Einstein to more accurately define his own theory, which regards the relationship between space and time.

hope it helps you

The Carnot refrigerator operates on the principle of transferring heat from a cooler region to a hotter region with the help of external work. The amount of heat that the refrigerator can remove from its inside compartment can be determined using the equation:

QC = W*(TC/TH - 1)



Efficiency (η) = (Tc / (Th - Tc))

Where Tc is the cold temperature (inside the refrigerator) and Th is the hot temperature (kitchen temperature). In this case, Tc = 277 K and Th = 287 K.

First, calculate the efficiency:

η = 277 / (287 - 277) = 277 / 10 = 0.277

Next, we can use the formula for the heat removed from the inside compartment, which is given by:

Qc = W / η

Where Qc is the heat removed and W is the work done. In this case, W = 2250 J.

Finally, calculate the heat removed:

Qc = 2250 / 0.277 ≈ 8103 J

So, the refrigerator can remove approximately 8103 Joules of heat from its inside compartment using 2250 Joules of work.

Learn more about refrigerator here : brainly.com/question/13002119

#SPJ11

The heat that is added to a system but doesn't increase the temperature of the system can be used for other processes such as changing the state of matter, increasing the internal energy of the system or performing work. The heat can also be lost to the surroundings through radiation or conduction. However, the amount of heat lost to the surroundings must be taken into consideration when calculating the total amount of heat added to the system. The heat can be used for other processes or lost to the surroundings.

The heat added to a system can be used for various processes, such as changing the state of matter or increasing the internal energy of the system. For instance, when heat is added to a solid, it can melt into a liquid without increasing the temperature of the system. Similarly, when heat is added to a gas, the gas molecules may move faster, increasing the internal energy of the system without increasing the temperature. The heat can also be used to perform work, such as in engines or turbines.

However, if the system is not insulated, some of the heat may be lost to the surroundings through radiation or conduction, which must be accounted for in the calculation of the total amount of heat added to the system.

To know more about heat, visit here :

brainly.com/question/1429452

#SPJ11

Calibration can be defined as the way an instrument is adjusted such that the measurement the instrument gives after calibration is precise and accurate.

One effective way to calibrate a thermometer is the use of ice water.

A thermometer can be defined as the instrument used to measure the temperature of a person or a substance.

A thermometer should be calibrated regularly in order to maintain a high level of precision and accuracy.

One of the effective ways to calibrate a thermometer is through the use of ice water.

The steps to calibrate a thermometer are given below:

To learn more, visit the link below:

https://brainly.com/question/11288363

Answer:

D

Explanation:

Hope this helped

Answer:

Coerce, compel, constrain

Explanation:

The race car's centripetal acceleration is  14.25 m/\(s^{2}\)

Centripetal acceleration, a = \(V^{2}\)/r

a = \(28.5^{2}\) / 57 = 14.25 m/\(S^{2}\)

Any change in velocity, including changes in speed, direction, or both, is referred to as acceleration. Even if the speed may be constant in uniform circular motion, the direction of the velocity changes continuously, therefore there is always an accompanying acceleration. You personally experience this acceleration every time you round a corner in your car. If you maintain a constant speed during the turn, you will be moving uniformly in a circle. Because both you and the car are changing directions, you sense a sideways acceleration. The more pronounced the acceleration, the sharper the curve and the greater your speed will be. The magnitude and direction of that acceleration will be looked at in this section.

Learn more about Centripetal acceleration here:

https://brainly.com/question/14465119

#SPJ4

The magnet will be a useful tool to pick the paper clips because the magnet can attract the paper clips.

The like poles of magnets repel while unlike poles of magnets attracts. Magnets attracts irons or metallic materials.

The paper clips are mettalic or made of iron and hence the magnet will attract them.

There we can conclude that the magnet will be a useful tool to pick the paper clips because the magnet can attract the paper clips and will help to gather them together for easy picking.

Learn more about magnets here: https://brainly.com/question/14997726

Answer:

B

A

A

B

Explanation:

In the wiring of houses, a parallel circuit is used, otherwise, if the circuit of one of the parts is interrupted, the current will not enter the other circuits.

Answer:

March 15, 1641

Cardinal Maffeo Barberini,

I long awaited for my words to reach you. I sit here in my study, writing to you from Pisa. First I must ask how you are, how everything is. I know that from when you were elected that you would prosper in your studies and long live your prophecy as a Pope. Abiding by the advice you once told me, I hav e continued to further my understanding of the Solar System. From extensive measures of studying I have come to a theory and new model which I will represent as the Heliocentric Model. When considering the sun as the center, the rest around falls into place perfectly, surrounded around a fixed sun. Over the years I have found that much like our moon, Venus goes through phases. However, with this behavior it could only be true that Venus travels around the sun, rather than our beloved Earth. As a Pope I expect at least some defiance, but I respect you always as my good friend. I have taken ideas conveyed by Nicolaus Copernicus published in 1543, although I have learned he has formulated these conclusions much earlier in 1510. Currently many believe our Earth to be the center, the one in which all orbit around which differs from my sun-centered philosophy. Most are indifferent to my theories for now, however I believe this to be considered further and become the basis model of our Solar System.

-Galileo  

Answer:

g= \(\frac{2d}{t^{2} }\)

Explanation:

The length of the acceleration vector is all there is to acceleration magnitude.

To put it another way, writing the magnitude of acceleration indicates how quickly velocity varies. In the standard international (SI) system, the acceleration is measured in units of meters per second square.

According to the equation a = v/t, acceleration (a) is determined by the product of the change in time (t) and the change in velocity (v) (t). In a velocity against time graph, the slope of the line segment is used to compute the magnitude of acceleration.

To do this, select two points on the graph that span the area of interest. Calculate the difference between the initial time and the final time as well as the initial velocity.

To learn more about acceleration magnitude refer to:

https://brainly.com/question/29678420

#SPJ4

The extension of the spring from the equilibrium position, given that a 5.5 N mass is attached to the spring spring is 0.4 m

From Hooke's law, we understood that the force, extension and spring constant are related according to the following formula:

Force (F) = Spring constant (K) × extension (e)

F = Ke

With the above formula, we can obtain the extension of the spring from it's equilibrium position. Details below:

Force (F) = Spring constant (K) × extension (e)

F = Ke

5.5 = 14 × e

Divide both sides by 14

e = 5.5 / 14

e = 0.4 m

Thus, from above calculation, we can conclude that the spring will extend by 0.4 m from the equilibrium positon

Learn more about extension of spring:

https://brainly.com/question/29091421

#SPJ1

The given statement " Gauss's Law is derived from the fact that the net flux, Phi_net, through any enclosed surface around any charge distribution is constant regardless of the size of the enclosed surface" is false.

Gauss's Law is not derived from the fact that the net flux through any enclosed surface around any charge distribution is constant regardless of the size of the enclosed surface. Gauss's Law is one of the four fundamental laws of electromagnetism, and it relates the electric field to the charge distribution in a closed surface.

The correct statement is: Gauss's Law is derived from the fact that the total electric flux through a closed surface is proportional to the total charge enclosed by that surface.

Gauss's Law states that the total electric flux through a closed surface is equal to (1/ε₀) times the total charge enclosed by that surface, and it provides a powerful tool for calculating electric fields in symmetric charge distributions using closed surfaces known as Gaussian surfaces.

To know more about Gauss's Law refer here :-

https://brainly.com/question/14767569#

#SPJ11

The net charge, or the total of the positive and negative charges, is constant in an isolated system because electric charge is a conserved attribute. Electrical charge is transported by subatomic particles. In ordinary matter, the protons in the atoms' nucleus contain positive charge whereas the electrons carry negative charge.

Plate's surface area is 0.13 x 0.13.

= × m²

400 m is the distance between the plates (0.40 mm).

3.0 MV/m is the critical field strength in the case of air.

Let's calculate the voltage when using air as the dielectric.

V = 3××400×V = 1200 V

We now discover capacitance.

C = εA/d

C = (8.854×)(16.9×)/(400×)

= 374× F = 374pF

Let's generate energy.

E = (1/2)(374×)(1200) (1200)

E = 269.28 × J

To learn more about critical please click on below link

https://brainly.com/question/15091786

#SPJ4

compressed0.32 meters

Explanation

Step 1

The force exerted by a spring on objects attached to its ends is proportional to the spring's change in length away from its equilibrium length and is always directed towards its equilibrium position.

so

let

replace and solve for x

the negative symbol indicates the spring is compresed

so, the answer is

0.32 meters

I hope this helps you

Answer:

1. When a substance is heated, the particles gain energy and move apart increasing the volume. This phenomenon is called thermal expansion.

2. When temperature increases, average kinetic energy increases.

Explanation:

Thermal expansion - the tendency of matter to change in volume in response to a change in temperature.

When the temperature of an object increases, the average kinetic energy of its particles increases while, when the average kinetic energy of its particles increases, the object's thermal energy increases.

The thermal energy of an object therefore increases as its temperature increases.