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How can matter be exchanged between spheres


Spheres are open systems. Matter and energy are constantly exchanged between the spheres via chemical reactions, radioactive decay, radiation (light&heat), growth and decay of organisms. 

Related Questions

Posted in Physics

Democritus thought that matter was made of tiny particles A. of earth, air, fire, and water. B. that could not be divided. C. that could be divided. D. that were all round and smooth.

Correct answer choice is :


B) That could not be divided.


Explanation:


Democritus was a Greek scholar who lived within 470-380 B.C. He elaborated the theory of the atom, Greek for permanent. Democritus thought that everything in the world was made up of atoms, which were tiny and durable. They assumed that matter was made up of very small particles. They named these particles atoms, which comes from an antique Greek word signifying permanent. These atoms were supposed to be absolutely indivisible and forever.

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Which statement is not true about electrons? Electrons have a negative charge. The orbit of electrons around the nucleus is like a cloud. The path an electron moves on is not very straight. The basic unit of matter is the electron.

Answer:

The basic unit of matter is the electron.

Explanation:

Electrons have a negative charge.

Above statement is true because electron is a negatively charged particle and its charge is given as e = -1.6 \times 10^{-19} C.

The orbit of electrons around the nucleus is like a cloud.

Above statement is true as electron forms a cloud around the nucleus and that cloud is known as orbit of electron.

The path an electron moves on is not very straight.

Above statement is true as Electron moves around the nucleus in closed loop and in this path centripetal force is given by electrostatic attraction force

The basic unit of matter is the electron.

Above statement is not correct as we know that basic unit of matter is not electron but it consist of electron, neutron and proton

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Which statement best describes the geocentric theory? A)The Earth and planets revolve around the sun. B)The stars form concentric spheres around the sun. C)All celestial bodies revolve around the Earth.

Answer:

The correct answer will be option-C.

Explanation:

The geocentric model is the model system which explained the planetary motion of the planets in the solar system.

The geocentric model was proposed by the Ptolemy which stated that earth is present at the center of the solar system and all the celestial bodies including planets and stars revolve around it.

This model system was disproved by Nicolas Copernicus which explained that Sun is present at the center of the solar system and all planets revolve around the sun,

Thus, Option-C is the correct answer.

Posted in Physics

Which of the three states of matter has the highest density? A:solid B:liquid C:gas

The correct answer is A. Solid

Gas has the least density because the atoms and molecules spread to fit the container. Liquids is between solid and gas when it comes to density, while solid has the highest density due to the way the molecules are tightly and closely connected.

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A blank is any disturbance that carries energy from one place to another through matter and space.

Explanation:

A wave is a disturbance that carries energy from one place to another through matter and space.

When we through a stone or a pebble in calm water, then the particles of water moves up and down and this process continues for some time. This implies that there is a disturbance produced in water.

The wave can be described using second-order linear partial differential equation. It is termed as wave equation.

There are many types of waves like the transverse wave and the longitudinal waves.

Posted in Physics

The universe is mostly made up of what? a. interstellar matter b. particles of dust and gas c. stars d. empty space

D. Empty Space

Imagine an apple in the center of a football field. Pretend like that apple is the nucleus of an atom. The electrons would be at the end-zones. The universe is just a butttonne of empty space

Posted in Physics

Pls.. help me with this i really need it.. pls. A gas in a cylinder expands from a volume of 0.110 m3 to 0.320 m3. Heat flows into the gas just rapidly enough to keep the pressure constant at 1.65 x 105 Pa during the expansion. The total heat added is 1.15 x 105 J. (a) Find the work done by the gas. (b) Find the change in internal energy of the gas. (c) Does it matter whether the gas is ideal? Why or why not?

 a)

At constant pressure, the work done for gas to expand is given by:

W = PΔV

⇒W = 1.65 × 10⁵Pa × (0.320 - 0.110)m³= 3.46 × 10⁴J

b)

The total heat (Q) added to the system is used in work done and the remaining energy goes into internal energy.

ΔU = ΔQ-ΔW

⇒ΔU = 1.15 ×10⁵J - 3.46 × 10⁴J = 0.8 × 10⁵ J

c)

It does not matter that the gas is ideal or real because the work done would remain same. It would vary for real gases only at very high pressure.

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The amount of matter in an object is called

The amount of matter in an object is called Mass.

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If all matter can exhibhit wave like properties, why isnt the wave like nature of your car obvious when you drive it through an open garage door

It is not obvious because we can't see the waves, you'd need a machine or ray beam to be able to see the waves.

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Matter that does not conduct energy easily

Insulators do not conduct energy easily

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During nuclear fission and fusion matter that seems to disappear is actually converted into

During nuclear fission and fusion matter that seems to disappear but is actually converted into energy. The amount of energy (E) produced in such a reaction can be calculated using Einstein's formula for the equivalence of mass and energy: E = mc^2. Hope this answers the question.

Posted in Physics

Which of the following statements is a consequence of the equation E = mc2? A. Energy is released when matter is destroyed. B. Mass and energy are equivalent. C. The law of conservation of energy must be modified to state that mass and energy are conserved in any process. D. all of the above

Answer;

B. Mass and energy are equivalent.

Explanation;

-Each of the letters of E = mc2 stands for a particular physical quantity.

E is the energy, m is the mass and c is the speed of light (m/s)

 Energy = mass x the speed of light squared

-The equation E=mc2 explains nuclear fusion, how matter can be destroyed and converted to energy and energy can be converted back to mass. It explains the atomic energy produced by nuclear power plants and the atomic energy released by atomic bombs.

-The equation tells us that mass and energy are related, and, in those rare instances where mass is converted totally into energy, how much energy that will be.

Posted in Physics

A 65kg person throw a 0.045kg snowball forward with a ground speed of 30m/s. A second person, with a mass of 60kg, catches the snowball. Both people on the skate. the first person is initially moving forward with speed of 2.5m/s, and the second person is initially at rest. what are the volocities of the two people after the snowball is exchanged? disregard friction between the skates and the ice

Well, st first we should find initial momentum for the first person represented in the task which definitely must be :
(65+0.045)*2.5
And then we find the final one :  65*x + 0.045*30
Then equate them together : x=2.48 m/s 
So we can get the velocity, which is  is 2.48 m/s
In that way, according to the main rules of conservation of momentum you can easily find the solution for the second person.
Regards!

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Why water is matter?what is the reason

 <a href="https://itunes.apple.com/app/id919087726">photomath</a>

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What is a force that attracts all matter to each other?

Gravity is the force thy attracts all mayter

Posted in Physics

Which of the following depend upon the amount of matter in an object? Only its mass Only its weight Both its mass and its weight Neither its mass nor its weight

As far as I remember, the following which would depend upon the amount of matter in an object is only its mass because weight is a point which is always variable according to the main rules of the gravitational pull. I bet this answer will be helpful for you! Regards!

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