What is the total number of electrons in an atom of an element with an atomic number of 18 and a mass number of 40?.

Two large planets may have high gravitational pull between them because the strength of gravity is partially based upon: mass.

Define the Law of gravitation?

Newton's law of gravitation states that-

Any particle of matter in the universe will gravitate toward any other with a force that varies directly as the product of the masses and inversely as the square of the distance between them

It is expressed as-

                                            F = G(m1m2)/R^2

where,

G is the gravitational constant,

m1 and m2 are the masses

R is the distance

More massive objects will pull apart with a stronger gravitational force because the gravitational force is directly proportional to the mass of both interacting objects. Consequently, the gravitational pull between two objects grows as their respective masses do as well. The force of gravity between two things multiplies by 2 if one of their masses doubles. The force of gravity between two objects is tripled if one of their masses is tripled. The force of gravity between two objects is multiplied by two when their masses are equal, and so on.

To learn more about gravity from the given link

https://brainly.com/question/940770

#SPJ4

When Bob wants to send a message to Alice he uses his copy of her public key to encrypt the message. Alice uses her securely-stored private key to perform the decryption.

Alice and Bob each publish a public encryption key, which allows anyone to send them an encrypted message. But they keep secret the corresponding decryption keys, so that only they can read the messages they receive.

Alice and Bob use a key exchange algorithm such as Diffie-Hellman-Merkle, to securely agree on an ephemeral  session key. They use the keys from step 1 only to authenticate one another during this process.

Learn more about Alice and Bob secret message here:- https://brainly.com/question/14969674

#SPJ4

The amplitude of the voltage across an inductor can be greater than the amplitude of the generator emf in an RLC circuit. Consider an RLC circuit with Epeak = 120 V, R = 15.3 capital omega, L = 1.31 H, and C = 2.09 µ F. The amplitude of the voltage across the inductor at resonance will be 6223.8624 V.

Peak voltage, Eo = 120 V

Resistance, R = 15.3 Ω

Inductance, L = 1.31 H

Capacitance, C = 2.09 μF = 2.09 × 10^-6 F

At resonance, the angular frequency is given by

ωo = 1/(LC)^1/2

= 1/ [(1.31×2.09 × 10^-6)^1/2]

= 0.606×10^3 rad/s

= 606 rad/s

XL = ωoL

= 606×1.31

= 793.86 ohm

Xc = 1/(ωoC)

= 1/(606×2.09 × 10^-6)

= 0.000789×10^6

=793.86 ohm

If there is resonance at the circuit then impedance will be equal to the resistance of the circuit.

So, Z = R = 15.3 ohm

Io = Eo/Z

= 120/15.3

= 7.84 A

Then ===3 across the inductor will be

VL = Io×XL

= 7.84×793.86

= 6223.8624 V

Hence,  the amplitude of the voltage across the inductor at resonance is 6223.8624 V.

To know more about RLC circuit here:

https://brainly.com/question/12993705

#SPJ4      

According to the given statement The maximum force p that can be supported at joint d is -P / √3 .

Pressing two spring ends together is a common visual representation of compression force. The physical shape of the spring gets compacted as compressive pressure is applied to it. The spring immediately extends outward and returns to its original shape when the strain is released.

F[tex]_C_D[/tex] sin 60⁰ = P

F[tex]_C_D[/tex] = 2P / √3.................(Tension)

F[tex]_E_D[/tex] + F[tex]_C_D[/tex] cos 60⁰ = 0

F[tex]_E_D[/tex] = -2P / √3 ×1 / 2 = -P / √3  ..................(Compression)

At joint C

F[tex]_A_B[/tex] = 2P / √3 ..................(Tensile)

F[tex]_B_E[/tex] = -2P / √3 ..................(Compression)

F[tex]_A_E[/tex] + Feb cos 60⁰ = Fec cos 60⁰ + Fed

F[tex]_A_E[/tex] = -2P / √3  × 1/2 + -P / √3 + -2P / √3 × 1/2

F[tex]_A_E[/tex] =  -P / √3

To know more about Compression visit:

https://brainly.com/question/13784481

#SPJ4

The force being exerted by the wall back on the person is equal to 20 N.

According to Newton's third law, when two bodies interact and exert forces on each other, these forces are referred to as action and reaction pairs.

Force can be defined as a push or pull exerted on an object when it interacts with another object. Force acting between two objects is divided into two types: contact force and non-contact force.

Newton’s third law of motion can be described as when one body exerts a force on another body, the first body will experience the same magnitude of the force in the opposite direction.

Therefore, when a person is exerted 20 N force on a stationary wall then the wall will exert 20 N force on the person.

Learn more about Newton's third law of motion, here:

brainly.com/question/23772134

#SPJ1

The time taken to complete its first five revolutions is 1.07 seconds.

We need to know about torque to solve this problem. Torque is the rotational equivalent of linear force. It can be determined as

τ = F x r

where τ is torque, F is perpendicular force and r is radius.

Torque is also can be calculated by the moment of inertia

τ = I . α

where I is moment of inertia and α is angular acceleration.

From the question above, the parameters given are

F = 0.49 N

I = 0.000412 kgm²

d = 9.25 cm

r = 0.04625 m

N = 5 turns

Find the angular acceleration

τ = τ

I . α = F x r

0.000412 . α = 0.49 . 0.04625

α = 55.01 rad/s²

Find the displacement of total revolution (θ)

θ = N . 2π

θ = 5 . 2π

θ = 10π rad

Find the time taken

θ = 1/2 . α . t²

10π = 1/2 . 55.01 . t²

t² = 1.14

t = 1.07 seconds

Find more on :

torque at: https://brainly.com/question/14839816

revolution at: https://brainly.com/question/16533738

#SPJ4

Now When the cannonball's x position is 100 meters and its y position is 25 meters below the launch site, this (75 m above the ground).

An mass-laden object attracted another item with mass. The strength of the force is proportional to the densities of the two surfaces and inverse to the square of the length between the two.

All material particles of matter are subject to gravity, commonly known as gravitation. The pull of gravity tends to pull any two items or particles with nonzero mass toward one another.

To know more about Gravity visit:

https://brainly.com/question/9722860

#SPJ4

The period of a satellite orbiting the moon, 99 km above the moon's surface is 1.96 hours.

Since the satellite is at a distance of 99 km from the surface and radius of the moon is 1740 km, the effective radius of orbit of the satellite will be

R = 1740+99 = 1839 km

Then taking the mass of the moon:

M = mass of moon = [tex]7.348\times10^{22} kg[/tex] kg

Now the time period can be calculated using the formula:

T = 2π√[R³/(GM)]

Where G is the universal gravitational constant with value [tex]6.67\times10^{-11}[/tex]

Substituting all the values we have, the time period of the given satellite of moon will be

T=7068 s =1.96 hours

Learn more about time period here:

https://brainly.com/question/5438962

#SPJ4

It needs to have more gravitational potential energy.

The swing slows down as its kinetic energy decreases. The swing comes to an end once all of its mechanical energy has been transformed into heat energy. It no longer possesses kinetic or potential energy. However, the system's overall energy remains constant.

The kinetic energy of the pendulum bob is now decreasing from this maximum value as it swings past the bottom, and will continue to do so until gravity completely transforms it back into potential energy.

To know more about kinetic energy visit:-

https://brainly.com/question/26472013

#SPJ4

The stationary and at the origin is, a) the pairs ac, bc, and dc have stationary centers of mass, b) The pair at the origin with the stationary center of masses is denoted by the symbol bc, and c) Ad and bd are the pair with the center of mass passing through the origin.

A surface is said to be frictionless if it has a force acting on any object that is almost zero or negligible, meaning that there is no resistance between the surface and the substance, allowing the object to slide and move freely without any friction.

Therefore,

The given data

Coordinates of the four particles are:

[tex]&a=(-4 \mathrm{~m}, 2 \mathrm{~m}) \\[/tex]

[tex]&\mathrm{b}=(4 \mathrm{~m}, 2 \mathrm{~m}) \\[/tex]

[tex]&\mathrm{c}=(-4 \mathrm{~m},-2 \mathrm{~m}) \\[/tex]

[tex]&\mathrm{d}=(4 \mathrm{~m},-2 \mathrm{~m})[/tex]

Having an understanding of the center of mass. The exact center of the tile connecting two particles with equal masses is where their centers of mass are located. Two particles' centers of mass will be stationary if they are moving at equal speeds but in opposite directions. We have taken the two masses in the diagram and compared their velocities to find where their centers of mass are located.

a) system pair calculations with a stationary center of mass

Particles a and c are depicted in the illustration as having the same speed but moving in the opposite direction. This indicates that the centers of mass for pairs a and c are fixed.

Particles b and c are depicted in the illustration as having the same speed but moving in the opposite direction. This indicates that the mass centers of the pairs b and c are stationary.

Particles d and c are depicted in the figure as having the same speed but moving in the opposite direction. This indicates that the centers of mass for the pairs d and c are stationary.

Therefore, the pairs ac, bc, and dc have stationary centers of mass.

b) system pair calculations with the center of mass at rest and the origin

The origin will be crossed by the line formed by the particles b and c. The line connecting particles b and c will have the origin as its midpoint because both are equally spaced from the origin.

Two particles' centers of mass will remain stationary if they are travelling at equal speeds but in opposite directions.

The pair at the origin with the stationary center of masses is denoted by the symbol bc.

c) system pair calculations when the center of mass crosses the origin

If we draw a line connecting the particles a and d, that line will pass through the origin. As an example, take the pair of particles a and d. The origin will be the midpoint of the line connecting particles a and d because both are equally far from the origin.

They will pass through the origin as they move with some speed in the indicated direction. If we draw a line connecting the two particles b and d, that line will be parallel to the y-axis. Their midpoint will be on the x-axis because both are equally spaced from it. They will pass through the origin as they move with some speed in the indicated direction.

Ad and bd are the pair with the center of mass passing through the origin.

To learn more about frictionless surface, refer to:

https://brainly.com/question/25825478

#SPJ4

At its lowest position, the speed of the lowest point on the hoop is √ 8 g R

U = m g h

U = Potential energy

m = Mass

g = Acceleration due to gravity

h = Height

Change in potential energy, ΔU = M g 2R

I = m r²

KE = I ω²

I = Moment of inertia

KE = Kinetic energy

ω = Angular velocity

Rotational kinetic energy of the hoop = Rotational KE of the hoop about its center + Rotational KE of the center of mass

Rotational KE of the hoop about its center = Rotational KE of the center of mass

KE = 1 / 2 M R² ω² + 1 / 2 M R² ω²

KE = M R² ω²

ΔU = KE

M g 2R = M R² ω²

ω = √ 2 g / R

v = r ω

v = 2 R √ 2 g / R

v = √ 8 g R

Therefore, at its lowest position, the speed of the lowest point on the hoop is √ 8 g R

To know more about Rotational kinetic energy

https://brainly.com/question/20261989

#SPJ4

The tension on a 4g string in its third harmonic would be 250N

Because musical instruments create vibrations that match to sound waves in the air, the motion is known as harmonic.

When a force according to Hooke's law is present and there is no friction, the simplest of all vibrations happens. The model we will use to describe vibrations in musical instruments is known as simple harmonic motion.

In order to model oscillations, such as those in wind turbines and vibrations in car suspensions, simple harmonic motion is crucial in research.

Learn more about Simple harmonic motion here:

brainly.com/question/28208332

#SPJ4

The moon pulls a person with a force of 2.4 10 3N. 2.4 × 10 − 3 N . Therefore, the moon's force on the guy is 3.5 x 10-6. 3 5 10 6 times the size of the earth.

The definition of "force" is unambiguous. It is quite acceptable to refer to a force of this level as a push or a pull. It's incorrect to say that an object "has in it" or "contains" a force. A force is experienced by one thing from another. The concept of a force makes no distinction between living creatures and inanimate objects.

A mass-containing object's velocity is altered by a push or pull. An external force is a force that can change a body's resting or moving condition. There is a magnitude and a direction to it.

It is common to utilize Isaac Newton's three principles of motion, which are described in his Principia Mathematica, to demonstrate the idea of force (1687)

= 3.78 x 108 m2 = 6.67 x 10-11N.m2kg27.35 x 1022 kg 70 kg

= 2.40 x 10-3 N

To learn more about Force refer to:

https://brainly.com/question/12970081

#SPJ1

Answer:

The voltage drop across a resistor is the voltage value across a resistor. This is what we call .

The formula to calculate voltage drop is

V= I × R

Explanation:

What is a resistor and the voltage drop accross it?

A resistor, on the other hand is a device that offers resistance to the current flowing through it. If we apply Ohm’s law, the resistor offers a voltage drop across a resistive device and it is given as:

 V(drop) = I × R

where, I = current through the resistor in (A) ampere

R = resistance in (Ω) ohms

V(drop) = voltage drop in (V) volts

To know more about voltage drop calculation click on the link https://brainly.com/question/29524230

#

There are very large numbers of charged particles in most objects. but still then, don't most objects exhibit static electricity because the charges present have equal numbers of positive and negative charges which makies the object electrically neutral.

How do you define static electricity?

A common electric phenomena called static electricity occurs when charged particles are transmitted from one body to another. An attractive force forms between two items, for instance, when two objects are rubbed together, especially if the objects are insulators and the air is dry around them. The one that gains electrons is negatively charged, whereas the one that loses them is positively charged.

                                1 e = 1.6 x 10^-19 C

Bringing two neutral things into physical touch will allow you to separate any positive or negative charges that may be present. Rubbing the two objects together can also increase the charge separation by removing electrons from one object's bonds and transferring them to the other.

Positively charged items are depleted of electrons when they are positively charged, and the opposite is true for macroscopic objects.A closed system's net charge is constant, according to the law of conservation of charge.

Hence, we see that though a large number of particles contain charge sthey do not conduct as they are electrically neutral

To learn more about static electricity from the given link

https://brainly.com/question/821085

#SPJ4

Studies investigated that rocks in their natural environment in shallow layers of Earth's crust are heated there naturally and can become magnetized.

3 foremost minerals (magnetite, pyrrhotite, and ilmenite) are strongly interested in a magnet. Two varieties of rock – serpentine and ironstone are nearly usually magnetic.

As magma or lava cools, those minerals start to shape. At this point, the molten rock has no longer completely solidified, so the magnetic minerals floating inside the molten mass, end up aligned with the magnetic subject.

Water is discovered in interior rocks nearly anywhere, even very deep underneath the earth's floor where it's far particularly warm. The water inside hot rocks may be very warm as well, and when this fluid comes to the earth's floor, it may generate electricity.

Learn more about Rocks here:-https://brainly.com/question/26046551

#SPJ4

A car is accelerated by the work from zero to 50 km/h. accelerating the car from requires 8wW0 of work.

When pressure is applied along a displacement, work is indeed the energy that is either added to or subtracted from an item. In its basic form, it equals equal product of the force's magnitude and the travel distance for a force applied directed in the same direction as the motion.

The joule is the Si derived unit of labor (J). It is described as the work accomplished over a one-meter distance by a pressure of one newton. A produce a satisfactory is something that candidates are asked to bring to a job interview, like an example of their writing or editing.

To know more about work visit:

https://brainly.com/question/18094932

#SPJ4

It takes 55.56 s for the aircraft to stop.

Solution:

t * 36 m/s = 2,000 m. So t = 2,000/36. t = 55.5555555…

We’ll round that to 56 seconds.

Deceleration is calculated by dividing the final velocity minus the initial velocity by the time it takes for this velocity to drop. Constant acceleration is defined as a change in velocity that does not change over time. The car speeds up by 20 miles an hour one minute, and another 20 miles an hour the next.

Average acceleration is constant at 20 mph per minute. Deceleration always refers to acceleration in the direction opposite to the direction of velocity. Delay always slows you down. Negative acceleration, on the other hand, is acceleration in the negative direction in the chosen coordinate system.

Learn more about Deceleration here:-https://brainly.com/question/75351

#SPJ4

The focal length located 38 cm to the left of a lens, the image is formed 22 cm to the right of the lens is the distance between the lens and the focal point.

All this lenses possesses focal point which is the point where all light incident on the lens converges after reflection. This focal point is closer to the pole of the curved lens. The length between this focal point of the curved mirror and the pole of the lens is therefore the focal length of the lens.

Object distance (u) = 38cm

Image distance(v) = 22cm

Focal length(f) =?

Lens formula:

1/f = 1/u + 1/v

1/f = 1/38 + 1/22

Taking the L. C. M of 22 and 38

1/f = (22 + 38) / 836

1/f = 60/836

Taking the reciprocal

f = 836/60

f = 13.9cm

Therefore, Focal length of the lens is 13.9 cm

To know more about focal length, refer: https://brainly.com/question/16819389

#SPJ4

At constant pressure, a fluid is present. Natural convection with the fluid won't happen if the volume doesn't change with temperature. Free convection, commonly referred to as natural convection.

Following the cessation of heating, mixing and conduction brought about by this natural convection eventually provide a nearly homogenous density and consistent temperature. Only forced-convection modes function in the absence of gravity (or other factors that produce a g-force of any kind).

Natural convection, also known as free convection, is a mechanism or type of mass and heat transfer in which fluid motion is produced solely by density differences in the fluid that arise as a result of temperature gradients, not by any external source.

Learn more about natural convection here

https://brainly.com/question/16635311

#SPJ4

The elements that are solid at STP are mentioned below.

An element is considered solid if

At STP 79 elements are solids up to uranium. Only some of them are non solid. Mercury is the only metallic element that is not solid. Mercury and bromine are liquid at STP. All noble gases and chlorine, fluorine, oxygen, nitrogen and hydrogen are gas at STP.

Therefore, the elements that are solid at STP are mentioned above.

To know more about elements that are solid at STP

https://brainly.com/question/1145202

#SPJ4

The time taken to reach the velocity 2v is 2fv/m. Acceleration is the term used to describe the change in a moving object's velocity with relation to time.

The directional speed of an item in motion, as measured by a specific unit of time and observed from a certain point of reference, is what is referred to as velocity.

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.

It is given that the force acting on the particle is F. So from Newton's law of motion;

F = ma

a =f/m

dv/dt = f/m

[tex]\int\limits^2_0{} \, dv \\[/tex][tex]= \int\limits^l_0 {f/m} \, dt[/tex]

2v = f/m * t

t = 2fv / m

Hence the time taken to reach the velocity 2v is  2fv / m

To learn more about velocity refer:

https://brainly.com/question/6504879

#SPJ4

The retention factor for a dye that travels 60 mm if the solvent travels 80 mm is 0.75.

The retention factor, Rf, of a dye is the ratio of the distance traveled by the dye over the solid phase and the distance traveled by the solvent over the solid phase.

The retention factor is a measure of how strongly attracted to the solid phase the dye is.

The higher the retention factor of a dye. the less attracted the dye is to the solid support and vice versa.

Hence, molecules that are more highly charged or more polar will be attracted to polar solid support such as paper more strongly and will have lower Rf values.

The retention factor of the dye will be:

Retention factor = 60 / 80

Retention factor =  0.75

Learn more about retention factor at: https://brainly.com/question/14528070

#SPJ1

On the solenold, increase the number more turns per unit length.

It functions as an electric and magnetic motor that is attached to your car's battery and is intended to take in low current power and start rotating the appropriately named starter gear before turning again to start a ’s electrical reaction and (in time) your full engine.

A grommet functions by establishing an electromagnet surrounds an electromagnet, which would be a vibrating nucleus. The electromagnetic field causes that armature to move, and when it does, it opens valves or switches, converting electrical energy to mechanical energy motion and force.

To know more about Solenoids visit:

https://brainly.com/question/15504705

#SPJ4

Kinetic friction is the name given to the force that exists between moving surfaces.

(Complete Question: In Figure 853, a block with mass m=2.5 kg enters a spring with spring constant k=320 N/ m. By the time the block comes to a stop, the spring is crushed by 7.5 cm. Kinetic friction between floors and blocks has a coefficient of 0.25. What are the blockfloor system's increased thermal energy and the work the spring force performs when the block is in contact with the spring and being brought to rest? How quickly does the block move toward the spring?

To learn more about Friction refer to:

https://brainly.com/question/24386803

#SPJ4

The required apparent frequency is F₀ = 1389.47 Hz

When a wave source and its observer move in close proximity to one another, the phenomenon known as the Doppler Effect occurs. Doppler, Christian Johann's discovery, is the process by which starlight increases or decreases depending on the relative motion of the star.

The Doppler effect occurs because each wave's crest emerges from a location that is closer to the observer than the crest of the previous wave when the wave source is moving in the direction of the observer.

According to the Doppler's Effect of sound waves :

F₀ = [tex]\frac{FV}{V-V_{0} }[/tex]

where : F₀ = the apparent frequency

V = is the sound of a sound wave

F = is the actual frequency of sound

V₀ = is the source velocity

Substituting the values in the formula :

F₀ = [tex]\frac{580 X 55.1}{55.1 - 32.1}[/tex]

F₀ = [tex]\frac{31,958}{23}[/tex]

F₀ = 1389.47 Hz

To know more about application of doppler's effect you may visit the link which is :

https://brainly.com/question/28106478

#SPJ4

Dematerialization occurs when one physical device, such as a smartphone, provides the functions that previously required many physical devices, such as GPS navigators, flashlights, medical devices, credit cards, texting, and cellular phones.

Dematerialization is the process of changing your physical stocks and securities into digital or digital form. The simple timetable is to smoothen the technique of buying, promoting, shifting, and conserving stocks and additionally approximately making it value-powerful and foolproof.

It is the primary requirement to open a Demat account earlier than transacting within the Indian monetary marketplace. The Demat account eliminates all of the dangers that have been related to the keeping of stocks or securities inside the bodily shape.

Learn more about devices here; https://brainly.com/question/2626540

#SPJ4

Yes, diamonds are found at depth of approximately 150-200km below the earth's crust. They are formed under conditions of intense heat and pressure that cause carbon atoms to crystallize.

Diamonds are acknowledged for their intense hardness, unmatched brilliance, and wealthy sentimental price. They're fabricated from almost a hundred% carbon atoms and are so long-lasting that the simplest another mineral that could scratch a diamond's surface is every other diamond.

Each carbon atom in a diamond carries 4 electrons in its outer shell, which might be shared by means of covalent connections with 4 other carbon atoms.

Diamonds are the earth's toughest natural substance. The simplest factor which could scratch a diamond is every other diamond! Diamonds form approximately a hundred miles below the earth and are carried to the surface by way of the volcanic hobby.

Learn more about Diamond here:-https://brainly.com/question/28337867

#SPJ4

Acceleration is the rate of change of speed as a feature of the time.

Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.

Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.

Learn more about acceleration here:- https://brainly.com/question/29110429

#SPJ4

True, The blue line (radius) is perpendicular to the green line (chord).

Perpendicular lines are lines that intersect at a right (90 degrees) angle. This lines are often normal to another line. So a perpendicular line at an angle of 90° to a given line, plane, or surface.

From the given diagram, the blue line (radius) is normal to the green chord.

That is the blue line cuts the green line at 90 degrees, so both lines are perpendicular to each other because the angle between them is 90 degrees.

Thus, we can conclude that the given statement about the blue line (radius) and the green line (chord) is TRUE.

Learn more about Perpendicular line here:

https://brainly.com/question/1202004

#SPJ1

Answer: False

Explanation:

I just took the quiz and the answer was false for the numbers 7.1 and 7.3