What two physical processes balance each other to create the condition?
What two physical processes balance each other to create the condition known as gravitational equilibrium in stars? Gravitational force and outward pressure.
Which of the following lists the layers of the Sun in the correct order from the center outward?
From center outward, which of the following lists the "layers" of the Sun in the correct order? Core, radiation zone, convection zone, photosphere, chromosphere, corona.
What do we mean when we say that the Sun is in energy balance?
What do we mean when we say that the Sun is in energy balance? The amount of energy released by fusion in the Sun's core equals the amount of energy radiated from the Sun's surface into space.
Which of the following lists the stages of life for a low mass star?
Which of the following lists the stages of life for a low-mass star in the correct order? protostar, main-sequence star, red giant, planetary nebula, white dwarf. the core shrinks while the rest of the star expands.
What two forces are balanced in what we call gravitational equilibrium?
gravitational equilibrium is a balance b/w the inward pull of gravity & the outward push of internal gas pressure.
What is the overall fusion reaction that convert mass into other forms of energy in the Suns core?
In the core of the Sun hydrogen is being converted into helium. This is called nuclear fusion. It takes four hydrogen atoms to fuse into each helium atom. During the process some of the mass is converted into energy.
Which two elements make up the Sun?
Oxygen: A critical element Despite the controversy, everyone agrees on the basics: The sun consists mainly of hydrogen and helium, the two lightest elements. It generates energy at its center through nuclear reactions that convert hydrogen into helium.
Why is it called energy balance?
The earth-atmosphere energy balance is achieved as the energy received from the Sun balances the energy lost by the Earth back into space. In this way, the Earth maintains a stable average temperature and therefore a stable climate.
How is your energy balance?
Energy is another word for "calories." Your energy balance is the balance of calories consumed through eating and drinking compared to calories burned through physical activity. What you eat and drink is ENERGY IN. What you burn through physical activity is ENERGY OUT.
Which two processes can generate energy to help a star maintain its internal thermal pressure?
Terms in this set (27)
- nuclear fusion and gravitational contraction. …
- low-mass star. …
- The cloud must radiate much of its thermal energy. …
- the onset of core hydrogen fusion. …
- A main-sequence star is hotter and dimmer than it was as a protostar.
What two forces are balanced in what we call hydrostatic equilibrium quizlet?
Terms in this set (16) The structure of the Sun is a matter of balance between the pressure outward and the force of gravity inward: this balance is known as hydrostatic equilibrium.
What two forces are in balance to create the condition known as hydrostatic equilibrium in the Sun?
Hydrostatic equilibrium, also known as gravitational equilibrium, describes a balance between gravity and pressure.
What is the overall nuclear fusion reaction in the Sun briefly describe the proton-proton chain?
The Sun gets its energy when hydrogen nuclei are fused together to form helium nuclei within the solar core. This hydrogen burning is described by a sequence of nuclear fusion reactions called the proton-proton chain.
What is the overall fusion reaction that takes place in the cores of all main sequence stars?
Main sequence stars are characterised by the source of their energy. They are all undergoing fusion of hydrogen into helium within their cores.
Do we have 2 suns?
Our Sun is a solitary star, all on its ownsome, which makes it something of an oddball. But there's evidence to suggest that it did have a binary twin, once upon a time.
How does the sun make energy?
Solar energy is created by nuclear fusion that takes place in the sun. Fusion occurs when protons of hydrogen atoms violently collide in the sun's core and fuse to create a helium atom. This process, known as a PP (proton-proton) chain reaction, emits an enormous amount of energy.
What are the two sources of energy for the Earth system?
The earth is a vast, complex system powered by two sources of energy: an internal source (the decay of radioactive elements in the geosphere, which generates geothermal heat) and an external source (the solar radiation received from the Sun); the vast majority of the energy in the earth system comes from the Sun.
What are the 3 types of energy balance?
1) Energy going into the body > Energy leaving the body = The body has positive energy balance. 2) Energy going into the body < Energy leaving the body = The body has negative energy balance. 3) Energy going into the body = Energy leaving the body = The body has equal energy balance.
What two forces must be in balance for a star to be stable?
Stars live out their lives in an exquisitely detailed equilibrium, or balance, between two powerful forces — outward pressure and the inward pull of gravity.
Which of the following processes allows these stars to be at the most stable stage of their life?
A star will enjoy most of its life in the main sequence phase. At this point nuclear fusion is turning hydrogen into helium. The star is only stable because the light pressure of this energy balances out the star's gravitational collapse.
What 2 forces are balanced in what we call gravitational equilibrium?
gravitational equilibrium is a balance b/w the inward pull of gravity & the outward push of internal gas pressure.
What two forces are balanced in what we call hydrostatic equilibrium?
Hydrostatic equilibrium, also known as gravitational equilibrium, describes a balance between gravity and pressure. Gravity works to contract while pressure works to expand. Hydrostatic equilibrium is the state where the force of gravity pulling inward is balanced by pressure pushing outward.
What 2 forces are balanced in the Sun?
This is an example of hydrostatic equilibrium, a balance between pressure and gravity.
What two forces are in balance inside the Sun quizlet?
Terms in this set (19) What two forces are in balance inside the Sun? The Sun's gravity inward and the force of gas pressure pushing outward.
When two protons fuse together in the first step of the proton-proton chain what is produced?
In the proton-proton fusion reaction, first two protons fuse. Usually the pair breaks apart again immediately, but once in a while one of the protons is transmuted into a neutron. The resulting proton-neutron pair is deuterium, a type of hydrogen. Also, a positron and a neutrino are emitted.
What is the proton-proton chain reaction describe this process quizlet?
The proton-proton chain takes the similar hydrogen nuclei and fuses them together to form the larger helium nucleus. Nuclear fission takes a larger nucleus and splits it into smaller nuclei.
What forces are balanced in a stable main sequence star like the Sun state what the force is and in what direction the force acts inwards outwards etc?
All main sequence stars (including the Sun) are in hydrostatic equilibrium. That is, the inward force of gravity, which tends to compress the star, is balanced by the outward force due to the pressure.
What does the process of nuclear fusion reaction have to do with the physical size of a star?
When a star begins fusing helium in the core, the energy output increases over that of hydrogen. This greater output pushes the outer layers of the star further out, increasing its size.
Who is the twin of Earth?
Venus Venus: Earth's twin planet?
Does Earth exist in Star Wars?
Earth is both canon and non-canon in 'Star Wars' In the opening crawl of the ride there's a mention of the “Earth system,” which means that in the Star Wars universe the planet indeed exists.