A car is traveling at an average speed of 120km/h.how long will it take to travel between two station 525km apart?​

Answer:

PART A

In a solid

The attractive forces keep the particles together tightly enough so that the particles do not move past each other. ... In the solid the particles vibrate in place. Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container.

In a liquid

Particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.

A gas

The particles move rapidly in all directions, frequently colliding with each other and the side of the container. With an increase in temperature, the particles gain kinetic energy and move faster.

PART B

The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces. The more particles that hit the walls, the higher the pressure.

Explanation:

GOOD LUCK!!! :)

Answer:

The change in kinetic energy is zero (0).

Explanation:

Given;

mass of the object, m = 3.0 kg

applied force, f = 6 N

distance through the object is moved, d = 4.0 m

The acceleration of the object is calculated as;

f = ma

a = f / m

a = (6) / 3

a = 2 m/s²

The constant speed through which this object is moved is calculated as;

v² = u² + 2ad

v² = 0 + 2 (2)(4)

v² = 16

v = √16

v = 4 m/s

The change in kinetic energy is calculated as;

ΔK.E = K.E(final) - K.E(initial)

ΔK.E = ¹/₂mv₂² -  ¹/₂mv₁²

v₂ = v₁ = v (since the mass was moved at a constant speed; v)

ΔK.E =  ¹/₂mv² -  ¹/₂mv²

ΔK.E = 0

Therefore, the change in kinetic energy is zero (0).

Answer:

The two solids in the right boxes

Explanation:

The two solids in the right boxes will most likely have the lowest boiling point and this can be inferred from their molecular configuration.

Answer:

Who was Alfred Wegener:  He was a German meteorologist and geophysicist

What did he theorize: he theorized continental drift and he also explained how all 7 continents were once together( aka Pangaea) on earth over millions of years ago.

Hope this helped a little!

Answer:

[tex] 3.278 \times {10}^{6} [/tex]

Explanation:

u = 0.0m/s

t = 34s

a = 9.81m/s²

Using Kinematics,

s = ut + 0.5at²

= 0 + 0.5(9.81)(34)²

= 5,670.18m.

Answer:

This is because there is no acceleration in the horizontal direction

Explanation:

This is because, the only acceleration affecting the object in horizontal and inclined projection is the acceleration due to gravity, which is directed the vertical downward direction. There is a velocity change only in the vertical direction and none in the horizontal direction because, there is no acceleration in the horizontal direction. So, its velocity remains constant.

Answer:

Mass of the melted wax

Explanation:

The mass of the original candle that has been burnt in the closed system is equal to the mass of the melted wax.

Answer:

Could you possible elaborate on the question more?

Answer:

eH?

Explanation:

Answer:

force=337.5N

accelertion=5.63ms^-2

Explanation:

please find the answers in the pictures above maam or sir.

Answer:

The answer is True.

Answer:

The radius is  [tex]r = 0.0170 \ m[/tex]  

Explanation:

From the question we are told that

      The speed at which the race car moves is [tex]v = 0.512 \ m/s[/tex]

       The centripetal acceleration is  [tex]a _r = 15.4 \ m/s[/tex]

Generally the centripetal acceleration is mathematically represented as

           [tex]a_r = \frac{v^2 }{r}[/tex]

=>        [tex]15.4 = \frac{0.512^2 }{ r}[/tex]

=>       [tex]r = 0.0170 \ m[/tex]  

Answer: c a d b

Explanation:

Glaciologists use Glen–Nye Flow Law, to predict the movements of glaciers thus, The pattern they predict in the markers over time would be C D A B.

In some parts of the world, glaciers are an important natural resource because the nature and behaviour of glaciers are an impact the hydrologic, geologic, and ecological systems of their immediate location.

Due to this, Glaciologists monitor and try to predict the movement and morphology of glaciers.

One of the techniques used by "Glaciologists" in the monitoring and prediction of glaciers in the use of markers.

The movement of markers is measured relative to the edges of the valley down which the glacier flows.

Thus, The movement of the markers are then predicted using the Glen–Nye Flow Law.

The pattern they predict in the markers over time would be C D A B.

Learn more about the glacier here;

https://brainly.com/question/17743729

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Answer:

solar panel or wind turbine

Explanation:

Because solar panel gives energy to electricity by sun and wind turbine gives energy through wind and both are renewable

Renewable energy that could be used to power an electric ticket machine that only needs to work during daylight hours is solar energy.

Solar energy is the term for solar radiation that can create heat, trigger chemical reactions, or create electricity. The total solar energy incident on Earth is far greater than the global energy needs at the moment and in the future. This highly distributed source has the ability to meet all future energy demands if properly exploited.

Due to its limitless supply and lack of pollution, solar energy is predicted to become a more appealing renewable energy source in the twenty-first century than the finite fossil fuels coal, petroleum, and natural gas.

Although sunlight is by far the most potent energy source that Earth receives from the Sun, its intensity at the surface of the planet is actually rather modest.

This is primarily due to the massive radial radiation propagating from the far-off Sun. Earth's atmosphere and clouds, which absorb or scatter as much as 54% of the incoming sunlight, cause a comparatively small additional loss.

Learn more about solar energy here:

https://brainly.com/question/9704099

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Answer:

See explanation

Explanation:

From Newton's law; the rate of change of momentum is proportional to the impressed force. Hence;

F.t = mv- mu

F= force

t= time

m= mass

V= final velocity

u = initial velocity

since u = 0, mv= 0

F= MV/t

F= 69.8 × 5.27/0.833

F= 442 N

Impulse = Ft= 442 × 0.833= 368 Ns

Answer:

C. Magnetic fields of atoms aligning

Answer:

c

Explanation:

a pex

Answer:

We could reduce the force or increase the mass of the object.

Explanation:

Using the definition of force, according to Newton's second law,  (F = ma) the acceleration is directly proportional to the force and inversely proportional to the mass. Therefore, if we want to reduce the acceleration of an object we have two options:

In both cases a will decrease.  

I hope it helps you!

Answer:

she improved upon the works of plato

Answer: A she became a teacher at Alexandria

Explanation:

Answer:

The more the number of batteries and coils, the more the electromagnetism.

Explanation:

An electromagnet is a structure formed by passing electricity through a good conductor. Due to the 'Magnetic Effect Of Electric Current', the object functions as an electromagnet, that is, by attracting magnetic objects to it.

This intensity of electromagnetism is greatly dependent on the Electric flow or Current as well as the Number of coils on the electromagnet.

By increasing the number of coils in the electromagnet, you actually increase the electric flow per area or the Magnetic Induction, helping to broaden its magnetic field.

The more batteries you connect to a circuit, the more will be its voltage. Similarly, the more batteries you connect to an electromagnet, the greater will be its strength, due an increased flow of electrons.

Answer:

The kinetic coefficient of friction between box and floor is 0.443.

Explanation:

Let suppose that the box is accelerated uniformly, the acceleration ([tex]a[/tex]), measured in meters per square second, is determined by the following kinematic formula:

[tex]a = \frac{v_{f}-v_{o}}{t}[/tex] (1)

Where:

[tex]v_{o}[/tex], [tex]v_{f}[/tex] - Initial and final speeds of the box, measured in meters per second.

[tex]t[/tex] - Time, measured in seconds.

If we know that [tex]v_{o} = 0\,\frac{m}{s}[/tex], [tex]v_{f} = 2\,\frac{m}{s}[/tex] and [tex]t = 4\,s[/tex], then the acceleration experimented by the box is:

[tex]a = \frac{2\,\frac{m}{s}-0\,\frac{m}{s} }{4\,s}[/tex]

[tex]a = 0.5\,\frac{m}{s^{2}}[/tex]

Based on the body diagram, we proceed to form the equations of equilibrium:

[tex]\Sigma F_{x} = P\cdot \cos \theta -\mu_{k}\cdot N = m\cdot a[/tex] (1)

[tex]\Sigma F_{y} = N - m\cdot g - P\cdot \sin \theta = 0[/tex] (2)

Where:

[tex]P[/tex] - Magnitude of the force exerted on the box, measured in newtons.

[tex]\theta[/tex] - Direction of the force exerted on the box, measured in sexagesimal degrees.

[tex]\mu_{k}[/tex] - Kinetic coefficient of friction between box and floor, dimensionless.

[tex]N[/tex] - Normal force from the floor to the box, measured in newtons.

[tex]m[/tex] - Mass of the block, measured in kilograms.

[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.

Now we proceed to solve the system of equation for the kinetic coefficient of friction between box and floor:

By (1)

[tex]\mu_{k}\cdot N = P\cdot \cos \theta -m\cdot a[/tex]

[tex]\mu_{k} = \frac{P\cdot \cos \theta - m\cdot a}{N}[/tex]

By (2)

[tex]N = m\cdot g +P\cdot \sin \theta[/tex]

And then, we get the resulting expression:

[tex]\mu_{k} = \frac{P\cdot \cos \theta - m\cdot a}{m\cdot g + P\cdot \sin \theta}[/tex] (3)

If we know that [tex]P = 400\,N[/tex], [tex]\theta = 50^{\circ}[/tex], [tex]m = 25\,kg[/tex], [tex]g = 9.807\,\frac{m}{s^{2}}[/tex] and [tex]a = 0.5\,\frac{m}{s^{2}}[/tex], then the kinetic coefficient of friction between box and floor is:

[tex]\mu_{k} = \frac{(400\,N)\cdot \cos 50^{\circ}-(25\,kg)\cdot \left(0.5\,\frac{m}{s^{2}} \right)}{(25\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)+(400\,N)\cdot \sin 50^{\circ}}[/tex]

[tex]\mu_{k} = 0.443[/tex]

The kinetic coefficient of friction between box and floor is 0.443.

The kinetic coefficient of friction between box and floor is 0.443.It is the ratio of friction force and the normal recation force.

It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).

Mathematically it is defined as the product of the coefficient of friction and normal reaction.

The given data in the problem is;

F is the force =400 N

m is the mass of box= 25-kg

u is the velocity starting from rest=0

v is the velocity achieved = 2.0 m/s

t is the time = 4.0 s.

[tex]\rm \mu[/tex] is  the coefficient of kinetic friction between box and floor.

The aceleration is found as;

[tex]\rm a= \frac{v_f-v_u}{t} \\\\ \rm a= \frac{2-0}{4} \\\\ \rm a= 0.5 m/sec^2[/tex]

The normal reaction force is find as;

[tex]N= mg +P sin \theta[/tex]

The cofficient of the kinetic coefficient of friction between box and floor;

[tex]\rm \mu_k = \frac{Pcos \theta - ma }{N } \\\\ \rm \mu_k = \frac{Pcos \theta - ma }{ mg +P sin \theta } \\\\ \rm \mu_k = \frac{400 cos 50^0 - 25 \times 0.5 }{ 25 \times 9.81 +400 \times sin 50^0 } \\\\ \rm \mu_k =0.443[/tex]

Hence he kinetic coefficient of friction between box and floor is 0.443.

To learn more about the friction force refer to the link;

https://brainly.com/question/1714663

Answer:

E=1/2kmv^2

Explanation:

To get the formula...

The dimension of energy is [ M^1 L^2 T^-2]

The dimension of mass [M]=[M^1 L ^0T ^0]

Dimension of velocity[V]=[M ^0 L ^1 T ^−1]

Let [E]=k[M] ^x[V] ^y

K is constant and it remain a dimensionless quantity.

Therefore, M ^1L ^2T ^−2]=k[M ^1L ^0T ^0] x[M ^0L ^1 T ^−1] y

So, x=1,y=2

E= Kmv^2

K=1/2

Therefore E is 1/2kmv^2.

Complete Question

Q. Two go-carts, A and B, race each other around a 1.0km track. Go-cart A travels at a constant speed of 20m/s. Go-cart B accelerates uniformly from rest at a rate of 0.333m/s^2. Which go-cart wins the race and by how much time?

Answer:

Go-cart A is faster

Explanation:

From the question we are told that

       The length of the track is [tex]l = 1.0 \ km = 1000 \ m[/tex]

       The speed of  A is  [tex]v__{A}} = 20 \ m/s[/tex]

       The uniform acceleration of  B is  [tex]a__{B}} = 0.333 \ m/s^2[/tex]

  Generally the time taken by go-cart  A is mathematically represented as

              [tex]t__{A}} = \frac{l}{v__{A}}}[/tex]

=>          [tex]t__{A}} = \frac{1000}{20}[/tex]

=>           [tex]t__{A}} = 50 \ s[/tex]

  Generally from kinematic equation we can evaluate the time taken by go-cart B as

             [tex]l = ut__{B}} + \frac{1}{2} a__{B}} * t__{B}}^2[/tex]

given that go-cart B starts from rest  u =  0 m/s

So

            [tex]1000 = 0 *t__{B}} + \frac{1}{2} * 0.333 * t__{B}}^2[/tex]

=>         [tex]1000 = 0 *t__{B}} + \frac{1}{2} 0.333 * t__{B}}^2[/tex]            

=>         [tex]t__{B}} = 77.5 \ seconds[/tex]  

Comparing  [tex]t__{A}} \ and \ t__{B}}[/tex]  we see that [tex]t__{A}}[/tex] is smaller so go-cart A is  faster

Answer:

Explanation:

In a battery charger (for an auto).

As a replacement for any bulb in an auto.

As a lamp in an emergency exit where the power must be shut off.

As a light that illuminates the back of a truck, turned on when loading the truck.

Answer:

The value of k is -4. Third choice

Explanation:

The Polynomial Remainder Theorem

It states that the remainder of the division of a polynomial f(x) by (x-a) is equal to f(a).

We are given the polynomial:

[tex]p(x)= x^3+kx^2+x+6[/tex]

And we also know x+1 is a factor of p(x). If x+1 is a factor of p(x), then the remainder of the division of p(x) by x+1 is zero.

Applying the remainder theorem for a = -1:

[tex]p(-1)= (-1)^3+k(-1)^2+(-1)+6=0[/tex][tex]-1 + k - 1 + 6 = 0[/tex]

Solving for k:

[tex]k = 1 + 1 - 6[/tex]

[tex]\boxed{k = -4}[/tex]

The value of k is -4. Third choice

Options are;

(a) the red beam

(b) the violet beam

(c) it is the same for both beams

(d) cannot answer this without knowing the light intensity

Answer:

A: Red Beam

Explanation:

The energy of a photon is given by the formula;

E = hc/λ

Where;

h is Planck's constant

c is speed of light

λ is wavelength

From online sources, wavelength of red light is greater than that of violet.

Thus, it means that the value of E for red light will be lesser than that of violet since the denominator under red light will be larger. Therefore, the beam of red light will have the greatest number of photons hitting the surface per second.

The Planck's equation and the definition of power allow you to find the result for which beam has the largest number of photons is:

The energy of a photon is given by the Planck's equation.

          E = h f

Where h is the Planck constant and f the frequency.

The speed of light is related to wavelength and frequency.

           c = λ f

           f = [tex]\frac{c}{\lambda }[/tex]

Let's  substitute

          E = [tex]\frac{hc}{\lambda}[/tex]  

Power is defined as energy per unit of time.

         P = W / t

         P t = W

The wavelength of red light, in the order of 700 nm, is greater than the wavelength of violet light, which is on the order of 400 nm, therefore the energy of a photon of red light is less than the energy of a photon of violet light.

            [tex]E_{red} < E_{violet}[/tex]

The total energy deposited is the number of photons times the energy of each photons.  

         W = [tex]#_{photons} \ E_o[/tex]  

They indicate that the power delivered by the two rays is the same.

        [tex]P_{red} = P_{violet}[/tex]

        #_ {red photons} [tex]E_{o \ red}[/tex]d = #_{photons violet}  [tex]E_{o \ violet}[/tex]  

        [tex]number_{red \ photons} = \frac{E_{violet}}{E_{red}} \ number _{violet \ photons}[/tex]

The amount of energy of the violet photons is greater than the amount of energy of the red photons.

         [tex]\frac{E_{violet}}{E_{red}} > 1[/tex]  

Consequently, to leave the same power, there must be more red photons than violet wavelength photons.

In conclusion, using Planck's equation and the definition of power, we can find the result for which beam has the greatest number of photons is:

Learn more here:  brainly.com/question/5528489

Answer:

i really don't know anything about love ,because i have never experienced  this .but love is just a person feeling and emotion about someone ,that we name as love.

Explanation:

Answer:

bro we cant do this

Explanation:

Answer:

The energy resource brought into a coal power plant is coal.

Found the answer at: https://www.tva.com/energy/our-power-system/coal/how-a-coal-plant-works#:~:text=Coal%2Dfired%20plants%20produce%20electricity,to%20start%20the%20process%20over.

The waste produced by coal power plants is coal ash and the energy produced by coal power plants is electricity.

Answers found at: http://www.groundtruthtrekking.org/Issues/AlaskaCoal/Coal-Ash-Combustion-Wastes.html       and        https://www.tva.com/energy/our-power-system/coal/how-a-coal-plant-works#:~:text=Coal%2Dfired%20plants%20produce%20electricity,to%20start%20the%20process%20over.

The two laws of thermodynamics apply to what I found out in my research because I know that the entropy increase due to the combustion of conventional fuels is much larger than that resulting from that of nuclear fuels, and is therefore much more dangerous. Also, I know that heat is used to burn coal and create energy.

Found answer at: https://www.encyclopedie-energie.org/en/energy-consumption-and-entropy-release-in-the-biosphere/

Explanation:

Hope this helps, i got an okay score on it but better than nothing i guess lol

The answer Is kilometers