A riverboat travels km downstream in hours. It travels km upstream in hours. Find the speed of the boat and the speed of the stream.

This is because the phenomenon of static electricity requires the separation of positive and negative charges. When two substances are in contact electrons are transferred from one to the other leaving one with an excess positive charge and the other with an equal negative charge.

There are equal numbers of positive and negative charges so an object is electrically neutral. Because the phenomenon of static electricity requires the separation of positive and negative charges. When two substances are in contact electrons are transferred from one to the other leaving one with an excess positive charge and the other with an equal negative charge.

The negative charge on the earth's surface is balanced by the same positive charge in the atmosphere. An atom has a net positive charge if the number of protons is greater than the number of electrons, and a net negative charge if the number of electrons is greater than the number of protons.

To know more about Static electric effects: brainly.com/question/28650063

#SPJ4

A) As there is a temperature rise it increases the value of the equilibrium constant when the forward reaction is endothermic. Equilibrium shifts to right.

B) When pressure is increased the equilibrium shifts towards the forward direction.

In the study of chemical reactions, equilibrium is crucial because it provides information about the reaction's direction. Equilibrium enables us to regulate the parameters of the reaction to favour the production of desired products. Calculating the composition of the final reaction mixture also makes use of it.

The force perpendicularly applied to an object's surface divided by the area over which it is dispersed is known as pressure.

Hence, when the temperature is raised even equilibrium shifts to right, similarly when pressure is increased the equilibrium shifts towards the forward direction.

To know more about Equilibrium, check out:

https://brainly.com/question/517289

#SPJ4

The work done by the friction force on the 8-kg sled is 64 Joule.

The work done by a force on an object is given by:

W = F . s

Where:

F = force

s = distance

Using the equation of motion:

v² = u² - 2 as

where:

v = final speed

u = initial velocity

a = acceleration

In this case v = 0 since the sled finally stops.

Hence,

0 = 4² - 2 as

2 as = 16

as = 8

Using the Newton's 2nd law of motion:

F = m . a

Where:

m = mass of the sled = 8

Substitute F = m . a into the work equation:

W = m . as

Substitute m = 8 and as = 8,

W = 8 x 8 = 64 Joule

Hence, the amount of work done is 64 Joule.

Learn more about work here:

https://brainly.com/question/25816840

#SPJ4

The fisherman enters the boat's front and checks to see how far it has moved is  [tex]\frac{2}{5}[/tex] L

Since the boat is symmetrical, we may be certain that its geometric centre, atx=L/2, is where the boat's centre of mass is located. In light of this, the centre of mass of the system made up of the fisherman and the boat can be determined as follows:

[tex]x_{cm}[/tex]=[tex]\frac{(m/4)(0)+m(L/2)}{m+(1/4)m}[/tex]=[tex]\frac{2}{5}[/tex] L

A boat is a watercraft that comes in a wide variety of shapes and sizes but is typically smaller than a ship, which is defined by its bigger size, shape, cargo hold, or passenger capacity, or its capacity to transport boats.

Typically, small boats are located in protected coastal areas or on inland waterways like rivers and lakes. Some vessels, like the whaleboat, were built specifically for use in offshore conditions. An object small enough to be transported aboard a ship is referred to as a boat in modern naval jargon.

Learn more about boats here:

https://brainly.com/question/17127182

#SPJ4

According to the Big Bang Theory, the early universe was an extremely hot place, and as it expanded, the gas inside of it cooled. Therefore, radiation known as the "cosmic microwave background," or CMB, which is essentially the leftover heat from the Big Bang, should be present everywhere in the cosmos.

The cooled residue known as the Cosmic Microwave Background (CMB) is the first light to ever flow freely through the universe.

The temperature of the cosmic microwave background varies only very slightly from nearly perfect uniformity in all directions due to the regions of slightly higher density that made it possible for galaxies to form.

To learn more about the Big Bang Theory

https://brainly.in/question/4921972

#SPJ4

The ratio of the electrostatic to gravitational force between two electrons 4.17×10 42

To learn more about gravitational force refer to:

https://brainly.com/question/27943482

#SPJ4

Answer:

11.0 m/s

Explanation:

a = (Vf - Vi) / t

Vf = at + Vi = (1.5 m/s²)(4.0 s) + 5.0 m/s = 11.0 m/s

Short Distance -Radar -Parallax -Main-Sequence Fitting -Cephid Variables -Type 1a supernovae -Galactic Redshifts Long Distance

What are the purposes of Cepheid variables?

The Cepheid variable is one of a family of variable stars whose periods—i.e., the length of one cycle of variation—are strongly correlated with their luminosities and are thus helpful in determining the distances between stars and between galaxies.

How do Cepheid variables come into play while calculating distance?

It is assumed that all Cepheids with a particular time have the same absolute magnitude. We may then use the period-luminosity connection to calculate a Cepheid's distance by measuring its apparent magnitude. If a Cepheid is fainter than another with the same period, it must be further away.

Where can one find Cepheid variables?

These Cepheid variable stars are visible in other galaxies. We can really see it well beyond both the Small and Large Magellanic Clouds. However, similar stars might be found in other galaxies.

To know more about cephid variables visit:

https://brainly.com/question/29104660

#SPJ4

With polar ice caps melting due to global warming, there will be enhancement of earth's rotation rate, thus resulting in decrease in the lengths of the day.

This fact is known to us that -

The polar ice caps will melt due to global warming

Water now locked up near the earth’s rotation axis will spread out around the surface of the globe

We have to determine why this will happen and if the length of the day will increase or decrease.

Firstly, let us understand what does rotation mean. Rotation of earth can be described as a phenomenon through which earth can keep on turning on its axis.

Due to global warming, snow glaciers will start melting, especially those present in the earth's rotation axis.

This, in turn, will lead the melted water into different surfaces around the globe.

As a result of global warming followed by increasing temperature and melting of water, the rotation of earth will be more than the current rate of rotation of the earth.

This implies that with increase in rotation of earth, there will be decrease in the length of the day. This is because the days will pass by soon with increased rate of rotation of earth.

Therefore, with polar ice caps melting due to global warming, there will be enhancement of earth's rotation rate, thus resulting in decrease in the lengths of the day.

To learn more about global warming visit https://brainly.com/question/12908180

#SPJ4

The point of destructive interference occurs when the result is within an integer value of +0.5.

distance between the speakers, d = 2.0 m,

frequency, f = 1800 Hz,

speed of the sound, v = 340 m/s,

and distance below the speakers, c = 4 m.

L= [tex]\sqrt{4 + 16}[/tex]

L= 4.47 m.

The wavelength of the sound wave is by:

Wavelength (λ)= V /F.

λ=340/1800

λ= .188 m

constructive interference, perfect destructive interference are

x= (4.7-4)/.188

x= 2.5

The higher frequency and the higher pitch are produced by sounds with shorter the wavelengths. So, long waves the sound are low and short waves sound is high.

To know more about interference visit:-  

https://brainly.com/question/16098226

#SPJ4

A magnetic field is a vector subject that describes the magnetic influence on shifting electric-powered costs, electric currents, and magnetic substances. A transferring charge in a magnetic subject studies a pressure perpendicular to its own speed and to the magnetic subject. A permanent magnet's magnetic subject pulls on ferromagnetic materials along with iron and draws or repels other magnets. in addition, a nonuniform magnetic field exerts minuscule forces on "nonmagnetic" substances with the aid of three other magnetic consequences: Para magnetism, diamagnetism, and antiferromagnetic, despite the fact that those forces are usually so small they can most effective be detected with the aid of laboratory system.

Magnetic fields surround magnetized materials and are created by using electric-powered currents inclusive of those used in electromagnets, and through electric fields varying in time. seeing that both energy and course of a magnetic discipline may also vary with region, its miles are described mathematically by a function assigning a vector to every factor of area, known as a vector subject.

To learn more about Magnetic fields visit here:

brainly.com/question/23094705

#SPJ4

The small deviation of cosmic microwave represent the temperature was uniform with very little fluctuations.

These small deviations represent regions of slightly higher density that made it possible for galaxies to form.

In Big Bang cosmology, the cosmic microwave background (CMB, CMBR) is electromagnetic radiation that could be a remnant from an early stage of the universe, also called "relic radiation".

The cosmic microwave is faint cosmic heritage radiation filling all areas. it's far a vital source of records of the early universe because it's by far the oldest electromagnetic radiation within the universe, dating to the epoch of recombination when the primary atoms were fashioned.

With a conventional optical telescope, the distance between stars and galaxies (the heritage) is absolutely dark (see: Olbers' paradox). but, a sufficiently sensitive radio telescope indicates a faint heritage brightness, or glow, nearly uniform, that is not associated with any megastar, galaxy, or different item. This glow is most powerful in the microwave region of the radio spectrum.

Cosmic microwave is landmark proof of the large Bang origin of the universe. When the universe become younger, before the formation of stars and planets, it turned denser, lots warmer, and full of an opaque fog of hydrogen plasma. because the universe elevated the plasma grew cooler and the radiation filling it extended to longer wavelengths.

Whilst the temperature had dropped enough, protons and electrons blended to shape impartial hydrogen atoms. not like the plasma, those newly conceived atoms couldn't scatter the thermal radiation with the aid of Thomson scattering, and so the universe has become obvious.

Therefore, the small deviation of cosmic microwave represent the temperature was uniform with very little fluctuations.

To learn more about microwave, refer: brainly.com/question/28197648

#SPJ4

Capacitence of each plate is 5.9 x 10^(-12).

An electrical component called a capacitor has two terminals and may store energy in the form of an electric charge. It consists of two electrically conductive plates that are spaced apart by a particular amount. A dielectric, an insulating material, or a vacuum can be used to fill the space between the conductors.The capacitor's capacity to hold charges is referred to as its capacitance. Opposing charge pairs are separated in capacitors to store energy. The most fundamental type is a parallel plate capacitor, which has two metal plates that are spaced apart by a gap. However, capacitors are available in a wide range of forms, sizes, lengths, girths, and materials.

C = ∈A/L

∈ = Permitivity of vaccum = 8.85 x 10^(-12)

A = Area of cross section = 20 x 10^(-4)[tex]m^{2}[/tex]

L = Sepration = 3 x 10^(-3) m

C = 8.85 x 10^(-12) x 20 x 10^(-4) / 3 x 10^(-3)

C = 5.9 x 10^(-12)

To know more about capacitence refer:

https://brainly.com/question/12644355

#SPJ4

The length of an edge of each small cube is [tex]3.445 * 10^{-9} m[/tex].

It is given to us that -

Temperature of the ideal gas = 27.0 degree Celsius

Atmospheric pressure on the gas = 1.00 atmosphere pressure

Molecules of the gas are uniformly spread

Each molecule at the center of a small cube

We have to find out the length L of an edge of each small cube if adjacent cubes touch but don't overlap.

For solving this problem, we have to make use of the formula of Boltzmann equation for ideal gas, which can be represented as -

[tex]PV = NkT[/tex] ---- (1)

where,

P = Pressure on the gas

V = Volume of the gas

N = Number of molecules of the gas

k = Boltzmann constant

T = Temperature of the gas

According to the given information, we have -

P = 1 atm = 101325 Pa

N = 1

k = [tex]1.38 *10^{-23} J/K[/tex]

T = 27°C = 27°C + 273 = 300K

Now, substituting these values in equation (1), we have

[tex]PV = NkT\\= > 101325 * V = 1 * 1.38 *10^{-23} * 300\\= > V = \frac{414 * 10^{-23}}{101325} \\= > V = 4.0858 * 10^{-26} m^{3}[/tex]------- (2)

We know that the volume of a cube in terms of its length is given as -

[tex]V = L^{3}\\ = > L = V^{1/3}[/tex] ----- (3)

Substituting the value of V from equation (2) in equation (1), we have -

[tex]L = V^{1/3}\\= > L = (4.0858*10^{-26} )^{1/3}\\= > L = 3.445 * 10^{-9} m[/tex]

Therefore, the length of an edge of each small cube is [tex]3.445 * 10^{-9} m[/tex].

To learn more about ideal gas visit https://brainly.com/question/28257995

#SPJ4

The arrow is propelled forward by muscular force. The arrow ultimately hits the ground due to the weight of gravity and air resistance.

This explains the reason the arrow was shot: Gravity's downward pull and air resistance have an effect on the arrow, causing it to eventually sink to the ground.

The arrow first moves forward in a straight line, but as gravity pulls it downward, it eventually collapses and comes to rest.

The constant force of attraction that holds everything in mechanics together is gravity, often known as gravitation. It has little impact on defining the intrinsic qualities of everyday items because it is the weakest known force in nature.

To know more about  muscular force, click the below link

https://brainly.com/question/1619698

#SPJ4

Every earthquake creates P waves and S waves. P waves travel away from the focus of an earthquake where the rocks first fractured by compressing and expanding the rocks as they travel through solids, liquids and gases. P waves travel through all parts of the Earth.

Answer:

Explanation:

jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjgggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg

Globalization alludes to the expanded interconnectedness between various regions of the planet. The interaction is a kind of shared trade of values, standards, and contemplations. All of the cooperating societies are profited from the culture.

Globalization has various numerous actual signs as confirmed by the consistent development of items, products, and administrations that cross worldwide boundaries consistently. The Worldwide South which sends its wares into an unpredictable market, and gives modest work to the world's large companies, has long voiced its mistake at the unfairness of inconsistent exchange relations and global administrative associations.

The obtrusive improvement in the South to support the development based economies in the North has a negative relationship with a reasonable climate (Iqbal). Hence, they see firsthand the social and ecological repercussions that a culture of utilization makes on the planet.

To know more about Globalization, visit here:

https://brainly.com/question/15283031

#SPJ4

The magnitude of the gravitational force is 7×10⁻⁷ N and the magnitude of the gravitational force due to Jupiter is 1.35×10⁻6 N.

Gravitational potential energy is the energy which a body posses because of its position.

The gravitational potential energy of a body is given as,

= G = Fr²/Mm

Here, (m) is the mass of the body, (F) is the gravitational force and (r) is the height of the body.

The mass of baby is 4.20 kg and mass of father is 100 kg. The distance between them is 0.200 m. Put the values in the above formula as:

= 6.67 X 10⁻¹¹ =  F (0.200)² / 100 X 4.20

= F = 7 X 10⁻⁷ N

The magnitude of the force on the baby due to Jupiter if it is at its closest distance to Earth, some 6.29×1011 m.

Put the values in the above formula again as:

= 6.67 X 10⁻¹¹ =  F (6.29 X 10¹¹)² / 1.9 X 10²⁷ X 4.20

= F = 1.35 X 10⁻⁶ N

Thus, the magnitude of the gravitational force is 7×10⁻⁷ N and the magnitude of the gravitational force due to Jupiter is 1.35×10⁻6 N.

To know more about Gravitational Potential Energy:

https://brainly.com/question/12896362

#SPJ4

Since the piston is forced to slide in a straight path, it experiences rectilinear translation. Given that it will remain horizontal while traveling in a circular motion, the connecting rod goes through curvilinear translation.

The piston reciprocates up and down in a straight line as the crank turns. Rotational motion into linear motion is converted via a crank and piston arrangement. According to the guide's orientation, the linear motion can be either vertical or horizontal (or in another direction).

Rectilinear motion is a motion in a straight line. In this motion, each particle travels the same distance in a straight line in a parallel fashion. Curvilinear Motion: The motion of a curved line.

To know more about Rectilinear motion visit:-

https://brainly.com/question/28044328

#SPJ4

The velocity of the cart at the bottom of the track is equal to 6.32 m/s.

Kinetic energy can be described as the energy exhibited by a moving body due to its motion. Work will be done by an object in order to change its kinetic energy.

The kinetic energy of a moving body can be determined from the mathematical formula mentioned below:

K.E. = ½mv²     where  ‘v’ and 'm' are the velocity and mass of the object.

Potential Energy can be defined as the stored energy due to its position and is given by P.E = m×g×h where g, m, and h are the gravitational acceleration, mass, and height.

Given, the mass of the cart =, m= 0.250 Kg

The final velocity of the cart, v = 0

The work done = Change in KE =  5.00 J

½mv² -  ½mu² = 5.00

½mu² = 5

(1/2)× 0.25 ×(u)² = 5

u² = 40

u = 6.32 m/s

Learn more about kinetic energy, here:

brainly.com/question/15764612

#SPJ1

Examples of motion energy are moving car, wind energy , planetary motion , free falling object, fan shaft moving, etc.

To understand more about energy -

https://brainly.com/question/18717831

#SPJ4

The answer is "No", sedimentary rocks do not form from heat and pressure at depths. They are formed by compression of ocean sediments.

Detritus rock is a type of sedimentary rock that forms at or near the Earth's surface as a result of the buildup and lithification of sand or as a result of rainfall to form solution at typical surface temps (chemical rock). The majority of rocks exposed on the surface of the Earth are sediment in nature, yet these rocks make up a very small portion of the crust overall, which is primarily composed of metamorphic and igneous rocks.

The weathering of previous rocks, followed by the transit and deposit of the weathered byproducts, produces sedimentary rocks.

To know more about Sedimentary Rocks:

https://brainly.com/question/10709497

#SPJ1

It will take 1.1824 min for the reactant concentration to decrease from 0. 13 m to 0. 088 m.

K = 0.33/min

for first-order reaction

K×t = ln([A0]/[A])

[A0] = 0.13 M

[A] = 0.088 M

t = ln (0.13/0.088)/0.33 = 1.1824 min

A first-order reaction depends on the awareness of the most effective reactant (a unimolecular response). other reactants may be present, however, their attention has no impact on the fee. The fee regulation for a primary order response is --d[A]/dt = okay[A],

Although not affecting the above math, the general public of first-order reactions continues through intermolecular collisions. Such collisions, which contribute the electricity to the reactant, are always 2nd order. The fee of those collisions is, but, masked via the reality that the price determining step stays the unimolecular breakdown of the energized reactant. The half of-existence is impartial of the beginning awareness and is given with the aid of t1/2 = In(2)/k

In organic chemistry, the class of SN1 (nucleophilic substitution unimolecular) reactions includes first-order reactions. for instance, in the reaction of aryldiazonium ions with nucleophiles in an aqueous solution, [ArN2+] + X− → ArX + N2, the fee equation is v0 = ok[ArN2+], wherein Ar shows an aryl group.

To learn more about First order reaction visit here:

brainly.com/question/1769080

#SPJ4

The tension on the aluminum wire is  52.02 N.

The speed of a wave on a string is equal to the square root of the tension divided by the mass per length. The formula used to calculate this speed of a pulse on the rope (the speed of a wave on a string under tension) is given by |v| = √(T/μ) where v is the speed of a wave, T is the tension on the wire, and μ is linear density (μ=m(mass)/L(length)).

Given the density of aluminum (ρ) is  2700 kg/m³, the diameter of the wire is 4.6-mm or 4.6 x 10⁻³ m, and the speed of the wave is 38 m/s.

First, find the area of the aluminum wire,

[tex]A = \frac{\pi d^2}{4}\\A =\frac{ \pi\times (4.6 \times 10^{-3})^2}{4}\\A = \mathrm{1.66 \times 10^{-5}\;m^2}[/tex]

Now, find the linear density of the wire,

[tex]\mu = \rho A\\\mu = \mathrm{2700\;kg/m^3 \times 1.66 \times 10^{-5} m^2}\\\mu = \mathrm{0.045\;kg/m}[/tex]

Substitute the value of linear density in the speed of wave formula to get tension.

[tex]\begin{aligned}34&=\sqrt{\frac{T}{0.045}}\\34^2&=\frac{T}{0.045}\\T&=1,156\times0.045\\&=\mathrm{52.02\;N}\end{aligned}[/tex]

The answer is 52.02 N and option c is correct.

The complete question is -

The density of aluminum is 2,700 kg/m3. If transverse waves propagate at 38 m/s in a 4.6 mm diameter aluminum wire, what is the tension on the wire?

a) 65 N

b) 39 N

c) 52 N

d) 78 N

To know more about the speed of waves:

https://brainly.com/question/15031238

#SPJ4

F equals 3N with respect to the circle's center, moving in the same direction as the centripetal acceleration.

Centripetal force is the force that pushes an item in the direction of its center of curvature. It is fundamental to how a centrifuge operates.

An item travelling in a circle is pushed inward toward what is known as the center of rotation, which is essentially what a roller coaster accomplishes when it travels through a loop. The force that maintains an object moving along a curved route is this pull toward the center, or centripetal force.

To know more about centripetal force visit:-

https://brainly.com/question/11324711

#SPJ4

Equation: The inclination of both the inclination well above horizontal might be estimated using its method

tan(θ) = a/g

If a denotes the block's acceleration & g denotes the velocity brought on by gravitation, wherein denotes this same degree of the slope just above perpendicular.

Here, g = 9.8m/s2 and a = 3m/s2.

The formula is given by replacing those inputs.

Solving for θ gives:

θ = 16.9°

Step 1: We need to use the equation for uniform acceleration to calculate the angle of the incline:

a = g*sinθ

Step 2: Rearrange the equation to solve for θ:

θ = sin-1(a/g)

Step 3: Substitute 3 m/s2 for a and 9.8 m/s2 for g:

θ = sin-1(3/9.8)

Step 4: Use an information to evaluate the angular position:

θ = 14.4°

Step 5: This inclination is 14.4° above that of the horizontal.

To know more about uniform acceleration click here

brainly.com/question/28641931

#SPJ4

The ideal efficiency of the engine 12%

Efficiency  (n)     =     1   -   (Tc / Th)

   n =  1 - (15 / 975)    =    0.985

   n =  1 -  (4 / 13)  =  0.692

   n =  1 - ( 282 / 320)   =   0.12

Even the most efficient heat engines have poor ideal efficiency, typically, it is much below 50%. Consequently, a significant amount of energy is wasted when it is lost to the environment by heat engines. Even though modern cogeneration, combined cycle, and energy recycling schemes are starting to harness this heat for other uses, a significant portion of the fuels produced worldwide are used to power heat engines, wasting up to half of the useable energy produced worldwide. There are three reasons for this inefficiency. The Carnot efficiency is a general term used to describe the temperature-related upper limit on any heat engine's efficiency. Second, due to the inherent irreversibility, some engine types are limited in terms of efficiency.

Learn more about ideal efficiency here:

https://brainly.com/question/11752408

#SPJ4

The combined speed of the pieces of clay of mass 2 kg respectively is 1 m/s.

Speed is the ratio of distance to time.

To calculate the combined speed of the piece of clay, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the combined speed of the piece of clay is 1 m/s.

Learn more about speed here: https://brainly.com/question/4931057

#SPJ1

a. The kilograms of mass that are converted to energy in the explosion is 1.1 × 10^27kg.

b. The ratio of mass destroyed to the original mass of the star is 5.55 × 10^-5.

It should be noted that the total energy is calculated as:

E = Ymc²

where m = mass

c = speed

y = relativistic factor

This will be illustrated as:

1 × 10^44J = 1 × 3.00 × 10^8 m/s

m = 1.11 × 20^27 kg

The mass is 1.1 × 10^27kg.

The ratio of mass destroyed to the original mass of the star will be:

= mass destroyed / original mass

= (1.1 × 10^27) / (2.0 × 10^31)

= 5.55 × 10^-5

Learn more about ratio on:

brainly.com/question/2328454

#SPJ1