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Cosmology
Cosmology is the area of physics that studies the universe in and of itself. Through the use of incredible and ingenious methods of experimentation, cosmologists attempt to discover how the universe began, how it is developing, and how or if it will end. Questions regarding the Big Bang, dark matter, dark energy, the cosmic background radiation, and the initial formation of the fundamental particles can be placed into this category.
776 Questions
The friction force that acts on objects that are at rest is?
If an object is stationary on a surface then the forces acting on it are the Gravitational force and the Normal force(the force of the surface pushing back against the object). Technically you could be pulling(or pushing) that object from opposite directions with equal forces and it would remain stationary. The important thing to understand is that a stationary object remains stationary so long as the net forces applied to it equal zero.
Is cosmology against the christian belief?
Cosmology, the study of the origin and evolution of the Universe, is not inherently against Christian beliefs. Some Christians integrate scientific findings with their faith, while others may find conflict between certain cosmological theories and their interpretation of scripture. Ultimately, the compatibility of cosmology and Christian belief varies among individuals.
What does the structure of the universe look like?
According to scientists and technology, the structure of the universe seems to be round and flat, so the space can be bent. Another theory would be round and very spacious. Really, no one knows for sure.
3 things that everything in the universe is doing at all times?
Everything in the universe is moving, interacting with other things, and following the laws of physics.
Who discovered that your universe is heliocentric?
The heliocentric model of the universe, with the Sun at the center and the planets orbiting around it, was proposed by Nicolaus Copernicus in the 16th century. Copernicus' work laid the foundation for modern astronomy and challenged the prevailing geocentric view of the universe.
To calculate the circumference of the known universe with the accuracy of one proton, you would need approximately 40 decimal places of pi. This level of precision is necessary due to the proton's extremely small size compared to the vast scale of the universe.
How many minutes have there been in the world?
There have been approximately 31.5 trillion minutes since the beginning of the world.
How many TME dimentions exist in the Universe?
Assuming you mean time dimensions, and not literally TME dimensions (whatever those might be), the answer is pretty definitely one. Hermann Weyl showed that Maxwell's theory of electromagnetism only works if there are 3 spatial dimensions and one time dimension. Max Tegmark, among others, has pointed out that you couldn't reliably predict future behavior if more than one time dimension existed. (E. g., catching a thrown ball would become a difficult to impossible task.)
Is there a vortex in your universe?
In the worldview of Universal Vortical Singularity, the entire observable universe is a spheroidal vortex, and this is empirically observed as the COBE temperature map of the CMBR dipole by the WMAP satellite.
Evidently, vortex phenomena in the universe are ubiquitous from the microcosms to the microcosms.
See a web site at www.uvs-model.com for the entire illustration for vortices of the universe.
Edwin Hubble has been given most of the credit for figuring out that the Doppler redshift from faraway galaxies means that they are receding from us at an incredible rate; and the further away they are, the faster they're receding.
The first to propose what became known as the Big Bang theory (no relation to the TV show of the same name) was Belgian astronomer Georges Lemaître, in 1927. It was given its name by English astronomer Fred Hoyle in 1949, during a radio broadcast meant to downplay and discredit the theory.
Give examples of energy transformations?
Here are some examples of energy transformation:
- Potential energy of a waterfall transforms to kinetic energy, moving the turbines, and then its transformation to electric energy through the turbo-generator system.
- Electrical energy goes through a toaster and turns into thermal energy or heat then sound when the toast is done.
- When you rub your hands together, your hands become warm. Mechanical energy due to motion is changed into heat.
- A television: Electrical energy--> light energy--> sound energy
- A firecracker: Heat to Chemical to Sound/Light. Reason being is that the source of the Chemical PE is heat in the match, which lights the fuse. Chemicals then burst when the heat hits the firecracker, and it creates a crack and it sparks.
- A light bulb: electrical to light and heat
- The energy used to blow a trumpet is transformed into sound.
- Sound: Clang two cymbals together. Part of the energy from the collision is transferred into sound.
- Heat: I skid on my knees on a wooden floor. I will eventually come to a stop, because the energy I used to skid is lost to friction and heat (which help cause those nasty wood burns).
- Kinetic: I jump out of a plane with a parachute. My potential energy is transformed tokinetic energy as I fall.
- Potential: I go up an elevator. My potential energy increases the higher I am from the ground.
- Chemical: Two hydrogen atoms react and form one dihydrogen molecule. Energy is stored in the bond formed between the two atoms.
- Nuclear: Nuclear power plants use nuclear fission and fusion in controlled reactions to generate energy.
Meteors can vary in size, ranging from as small as a grain of sand to as large as a boulder. When a meteor enters the Earth's atmosphere, it heats up and creates the glowing streak of light we see, known as a meteor or shooting star.
How are dark matter and dark energy similar?
No, at present dark matter can't be used as energy.
However, when Marco Polo went to China he observed the them burning black rocks (coal) for heat. This was an unknown and unexpected source of energy in Europe at the time. Undiscovered sources of energy are by definition presently unknown.
Is there such thing as the subatomic universe?
Yes, the subatomic universe refers to particles and forces that exist at a scale smaller than atoms. This includes particles such as electrons, protons, and neutrons, as well as the fundamental forces that govern their interactions, such as electromagnetism and the strong and weak nuclear forces.
Stars emit light due to thermonuclear reactions happening in their cores. Therefore, by definition, stars are luminous and cannot be dark. However, some stars may appear dimmer to us based on their distance, size, or phase in their life cycle.
Where is earth located in the universe?
Earth is located in the Virgo Supercluster of galaxies.
In that supercluster we are in a smaller group of galaxies called the Local Group.
Earth is in the second largest galaxy of the Local Group - the Milky Way.
Earth is located in one of the spiral arms of the Milky Way (called the Orion Arm) about two-thirds of the way out from the center of the galaxy.
In our solar the solar system - a group of eight planets - we are the third planet from the sun.
See link for a pictorial representation of our location.
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Space is not a grid on which there are predesignated coordinates, our position can only be described with reference to the objects around us. with that in mind, we are on the third major planet orbiting a pretty average G2 type star, in a spiral arm about 8 kpc from the centre of a pretty average SBbc galaxy, which is part of a pretty average cluster of galaxies we call the Local Group.
^^ Right who ever said This yall So smart yall desvere a sticker on your forhead for this one
orbiting the sun
in the milky way
In Space.
in the universe
Matter from a nebula that has begun to condense?
As matter from a nebula condenses, it begins to form into clumps due to gravity. These clumps eventually evolve into protostars, as heat and pressure increase at their cores, initiating the process of nuclear fusion. This marks the beginning of a star's life cycle.
Was there acutally a bang to be heard in the big bang?
No because then it wouldn't have been a bang.
The above information is actually incorrect, however is slightly correct in the respect that tecqnically a bang is a loud noise, the big bang should actually be called the big explosian, back to the main topic, the big "bang"would have been silent as space is a large vaccum and does not carry the waves needed to carry sound
as an example we learnt in school last year that in space if two astronaughts microphones broke they would have to phsically touch helmets to communicate as the vaccum of space would not carry the waves between particle (like on earth)
What is the educational requirement for a cosmology?
Cosmology falls under the fields for Physicists and Astronomers. Therefore, the following is written by and according to the U.S. Department of Labor and particular to the education and training required for Physicists and Astronomers.
Because most jobs are in basic research and development, a doctoral degree is the usual educational requirement for physicists and astronomers. Master's degree holders qualify for some jobs in applied research and development, whereas bachelor's degree holders often qualify as research assistants or for jobs in other fields where a physics background is good preparation, such as engineering and technology.
Education and training. A Ph.D. degree in physics or closely related fields is typically required for basic research positions, independent research in industry, faculty positions, and advancement to managerial positions. Graduate study in physics prepares students for a career in research through rigorous training in theory, methodology, and mathematics. Most physicists specialize in a subfield during graduate school and continue working in that area afterwards.
Additional experience and training in a postdoctoral research appointment, although not required, is important for physicists and astronomers aspiring to permanent positions in basic research in universities and government laboratories. Many physics and astronomy Ph.D. holders ultimately teach at the college or university level.
Master's degree holders usually do not qualify for basic research positions, but may qualify for many kinds of jobs requiring a physics background, including positions in manufacturing and applied research and development. Increasingly, many master's degree programs are specifically preparing students for physics-related research and development that does not require a Ph.D. degree. These programs teach students specific research skills that can be used in private-industry jobs. In addition, a master's degree coupled with State certification usually qualifies one for teaching jobs in high schools or at 2-year colleges.
Those with bachelor's degrees in physics are rarely qualified to fill positions in research or in teaching at the college level. They are, however, usually qualified to work as technicians or research assistants in engineering-related areas, in software development and other scientific fields, or in setting up computer networks and sophisticated laboratory equipment. Increasingly, some may qualify for applied research jobs in private industry or take on nontraditional physics roles, often in computer science, such as systems analysts or database administrators. Some become science teachers in secondary schools.
Holders of a bachelor's or master's degree in astronomy often enter an unrelated field where their strong analytical background provides good preparation. However, they are also qualified to work in planetariums running science shows, to assist astronomers doing research, and to operate space-based and ground-based telescopes and other astronomical instrumentation.
Many colleges and universities offer a bachelor's degree in physics. Undergraduate programs provide a broad background in the natural sciences and mathematics. Typical physics courses include electromagnetism, optics, thermodynamics, atomic physics, and quantum mechanics.
Approximately 190 universities offer Ph.D. degrees in physics; more than 60 additional colleges offer a master's as their highest degree in physics. Graduate students usually concentrate in a subfield of physics, such as elementary particles or condensed matter. Many begin studying for their doctorate immediately after receiving their bachelor's degree; a typical Ph.D. program takes about 6 years to complete.
About 75 universities grant degrees in astronomy, either through an astronomy, physics, or combined physics-astronomy department. About half of all astronomy departments are combined with physics departments, while the remainder are administered separately. With about 40 doctoral programs in astronomy, applicants face considerable competition for available slots. Those planning a career in the subject should have a strong physics background. In fact, an undergraduate degree in either physics or astronomy is excellent preparation, followed by a Ph.D. in astronomy.
Many physics and astronomy Ph.D. holders begin their careers in a postdoctoral research position, in which they may work with experienced physicists as they continue to learn about their specialties or develop a broader understanding of related areas of research. Initial work may be under the close supervision of senior scientists. As they gain experience, physicists perform increasingly complex tasks and achieve greater independence in their work. Experience, either in academic laboratories or through internships, fellowships, or work-study programs in industry, also is useful. Some employers of research physicists, particularly in the information technology industry, prefer to hire individuals with several years of postdoctoral experience.
Other qualifications. Mathematical ability, problem-solving and analytical skills, an inquisitive mind, imagination, and initiative are important traits for anyone planning a career in physics or astronomy. Prospective physicists who hope to work in industrial laboratories applying physics knowledge to practical problems should broaden their educational background to include courses outside of physics, such as economics, information technology, and business management. Good oral and written communication skills also are important because many physicists work as part of a team, write research papers or proposals, or have contact with clients or customers who do not have a physics background.
Certain sensitive research positions with the Federal Government and in fields such as nuclear energy may require applicants to be U.S. citizens and to hold a security clearance.
Advancement. Advancement among physicists and astronomers usually takes the form of greater independence in their work, larger budgets, or tenure in university positions. Others choose to move into managerial positions and become natural science managers. Those who pursue management careers spend more time preparing budgets and schedules. Those who develop new products or processes sometimes form their own companies or join new firms to develop these ideas.
For the source and more detailed information concerning your request, click on the related links section (U.S. Department of Labor) indicated directly below this answer section.
This uniform and isotropic radiation can only be explained as photons that could FINALLY travel through our Universe, about 370,000 years after the Big Bang. Prior to that, the density of nucleons and electrons was so high that no photon could travel for very long before blasting into some of these particles that were trying to form an atom. Eventually the density became low enough that photons could avoid these pairs. At this point, photons began to travel through our Universe, and atoms began to form.
The spectrum and isotrophy of the CMBR is explained PERFECTLY by the Big Bang Theory. No other hypothesis can explain it in any other way beyond, "It's just there and I have no explanation WHY it should be."
The theory of cosmology ehich Copernicus proposed is called the what theory?
The theory of cosmology that Copernicus proposed is called the heliocentric theory. This theory placed the Sun, rather than the Earth, at the center of the solar system, with the planets orbiting around it.
What are the two categories you use to classify everything in the universe?
Matter and energy are the two categories used to classify everything in the universe. Matter makes up physical objects, while energy is the capacity to do work or produce heat.
Was the universe made by an explosion?
The Big Bang theory suggests that the universe began expanding from a very high-density and high-temperature state, but it was not an explosion in the traditional sense. It was a rapid expansion of space itself, not an explosion within preexisting space.
The universe is organized according to what?
The universe is organized according to physical laws such as gravity, electromagnetism, and the nuclear forces. These laws govern the behavior of matter and energy at different scales, from atoms to galaxies. This organization allows for the emergence of stars, planets, and life as we know it.
Is mercury dry and have craters like the moon?
First ,the presence of craters on Mercury. Yes these are present and have been confirmed by NASA photographs. These craters are created by similar processes as those on the moon.Mercury has water ice in shadowed craters at its north pole. This was identified by radar examination of the planet in 1994 and later confirmed by NASA photographs.
Similarly water ice has been identified in shadowed craters at the moon's poles.
As a consequence:
- Mercury is not dry, it has ice deposits
- Mercury has craters formed by impacts like those on the moon.
- Some of the craters in both locations are dry (the majority) Others have ice deposits.
