Last Updated on July 23, 2022 by amin

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## Why are astronauts weightless in the space station as it orbits Earth?

(B) An astronaut orbiting the Earth does feel weightless **because there is no ground or normal force to counteract the force of gravity**. Thus the astronaut is falling. However since the astronaut is also moving forward super fast he/she continuously falls around the Earth rather than crashing into the Earth. See also how are changes in matter related to changes in energy

## Can we breathe without gravity?

**As long as the air around us is thick enough we can breathe regardless of gravity**. On Earth gravity is what holds our atmosphere. When astronauts go into space they can breath because their space ships and space suits keep the air around them even though gravity is very weak.

## What happens if an orbiting object is given a speed greater than Earth’s escape velocity?

The Moon orbits the Earth and the Earth in turn orbits the Sun. Spacecraft can also orbit the Earth. If an object gains enough speed to attain escape velocity its orbit becomes an open curve called a parabola. If it continues moving faster than escape velocity **its orbit is a flattened curve called a hyperbola**.

## GCSE Physics – What is an Orbit? #86

## Circular Orbits | Astrophysics | Physics | FuseSchool

## Which orbital designation has the highest energy?

s orbitalWithin a given principal energy level the energy of the electrons in the **p orbital** will be more energetic than the electrons in the s orbital. The energy of the electrons in the d orbital will be more than the p orbital.

## How Satellite Works (Animation)

## Why did Ptolemy have the planets orbiting Earth on ʺcircles upon Circlesʺ in his model of the universe?

Why did Ptolemy have the planets orbiting Earth on “circles upon circles” in his model of the universe? **predict future events affecting nature and people**. … It held that the planets moved along small circles that moved on larger circles around Earth and that the combined motion sometimes resulted in backward motion.

## What would happen if a rocket were launched with a speed greater than Earth’s escape velocity?

What would happen if the Space Shuttle were launched with a speed greater than Earth’s escape velocity? **It would travel away from Earth into the solar system.**

## Is orbiting astronauts accelerating?

The astronauts are in the Space Shuttle and the Space Shuttle is in orbit around the Earth. But is it accelerating? **Yes**. It is accelerating because the Earth pulls on it through the gravitational force.

## What Do We Mean By The Orbital Energy Of An Orbiting Object (such As A Planet Moon Or Satellite)??

What do we mean by the orbital energy of an orbiting object (such as a planet moon or satellite)? Orbital energy is **the sum of the object’s kinetic energy and its gravitational potential energy as it moves through its orbit**. … If it does not have escape velocity it will either fall back down or orbit Earth.

## What happens if an orbiting object is given a speed greater than Earthʹs escape velocity quizlet?

What would happen if the Space Shuttle were launched with a speed greater than Earthʹs escape velocity? **It would travel in a higher orbit around Earth.** **It would orbit Earth at a faster velocity.**

## What is the difference between a bound orbit and an unbound orbit around the sun?

What is the difference between a bound orbit and an unbound orbit around the Sun? Your Answer: **An object on a bound orbit follows the same path around the Sun over and over** while an object on an unbound orbit approaches the Sun just once and then never returns.

## What would happen if Earth were twice as far from the sun?

Also that gravitational force had to predict the correct behavior of falling bodies on Earth as observed by Galileo. … In other words if a planet were twice as far from the Sun the force would be **(1/2) ^{2} or 1/4 as large**. Put the planet three times farther away and the force is (1/3)

^{2}or 1/9 as large.

## Why do electrons move to higher energy levels?

An electron will jump to a higher energy level when **excited by an external energy gain such as a large heat increase or the presence of an electrical field** or collision with another electron.

## What happens if rocket doesnt reach escape velocity?

If a rocket goes fast enough and high enough to enter space but does not reach escape velocity **it will enter orbit around the Earth**. The International Space Station and many satellites orbit the Earth.

## Which planet has the lowest escape velocity?

Pluto**Pluto** is the smallest planet so it will have the least escape velocity.

…

Planet Observations | Escape Velocities (km/sec) | Mass Relative to Earth |
---|---|---|

Earth | 11.2 | 1 |

Jupiter | 63.4 | 317.8 |

Mars | 5 | 0.11 |

Mercury |
4.2 | 0.06 |

See also how many smokejumpers are there

## Why are astronauts in space said to be weightless but not massless?

why are the astronauts in space said to be weightless but not massless? **because the force of gravity is extremely small and space in a lack of attraction between bodies that gives away to that astronauts is essentially absent**. they maintain their intrinsic Mass however.

## What is the orbital radius of the moon?

Radius of the moon: **1.7 x 10 ^{6} m**. Orbital radius of the Moon around the Earth: 3.48 x 10

^{8}m.

## When an electron in an atom goes from a higher energy?

When the electron changes levels it decreases energy and the atom emits **photons**. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.

## Is circular an unbound orbit?

C) A bound orbit is circular while an unbound orbit is **elliptical**.

## What would happen if a spaceship launched with less than escape speed?

If you fail to reach escape velocity from the earth you won’t break free of its gravitational well in other words you will **keep orbiting the center of mass of the earth**. If the path of your orbit intersects the surface of the earth then you will you know crash.

## When one object is tidally locked to the larger object it is orbiting it?

Tidal locking is the phenomenon by which a body has the same rotational period as its orbital period around a partner. So **the Moon** is tidally locked to the Earth because it rotates in exactly the same time as it takes to orbit the Earth. That is why we only see one side of the Moon.

## What is a bound orbit?

A bound orbit is **one in which the light object makes many loops around the heavier object**. For example the planets are in bound orbits around the Sun.

## What if Earth was 10x bigger?

If the hypothetical super-Earth were even bigger say 10 times its current mass dramatic changes could start happening in Earth’s interior. **The iron core and liquid mantle** would also be 10 times larger and with more gravity acting on a larger mass the pressure beneath Earth’s surface would increase.

## Do unbound orbits have more orbital energy than bound orbits?

Doubling the distance between two objects halves the gravitational force between them. The escape velocity from Earth is greater for larger rockets than for small ones. Unbound orbits have **more orbital energy than bound orbits**.

## What is called orbit?

An orbit is **a regular repeating path that one object takes around another object or center of gravity**. Orbiting objects which are called satellites include planets moons asteroids and manmade devices. 5 – 12+ Astronomy Geography Physics.

## How can an electron in an atom loses energy to go from a higher energy level to a lower energy level?

How can an electron in an atom lose energy to go from a higher energy level to a lower energy level? **It releases a photon equal in energy to its own energy drop.**

The relationship between the escape velocity and the orbital velocity is defined by **Ve = 2 Vo** where Ve is the escape velocity and Vo is the orbital velocity. And the escape velocity is root-two times the orbit velocity. … If the source mass is earth the escape velocity has a value of 11.2 km / s.

## What is the orbital speed of planet Earth give your answer in km/h and km s?

Earth: **29.78 km/s** (66 615 miles per hour) or a period of about 365.256365 days. Mars: 24.077 km/s (53 853 miles per hour) or a period of about 686.93 days.

## What happens if a gas cloud shrinks?

As the cloud shrinks **its gravitational potential energy is converted to the kinetic energy of individual gas particles falling inward**. These particles crash into one another converting their kinetic energy into thermal energy.

## Why do planets not fall into the sun?

Paradoxically it is the Sun’s gravity that keeps the planets in orbit around it just as the Earth’s gravity keeps the Moon and satellites in orbit around it. The reason they do not just fall into the Sun is that **they are traveling fast enough to continually “miss” it**.

## When an astronaut in orbit are weightless he or she is?

When we say that an astronaut is “weightless ” this can mean one of two things. First that he or she is **so far away from a massive object** (asteroid moon planet star) that the value of the force of gravity on mass m = GMm/(R+h)^{2} is vanishingly small (i.e. h is enormous in comparison to R).

## Is hyperbolic an unbound orbit?

Two types of orbits are possible: bound and unbound orbits around the central body. … Planets asteroids and comets move on such orbits. Objects on unbound orbits will eventually leave the solar system. Typically interstellar dust particles move on unbound hyperbolic orbits **through the solar system**.

## At what height does gravity stop?

Near the surface of the Earth (sea level) gravity decreases with height such that linear extrapolation would give zero gravity at a height **of one half of the Earth’s radius** – (9.8 m·s^{−}^{2} per 3 200 km.) See also why are cartographers important

## Which of the two bowling balls accelerate faster during their fall?

They both fall with the same acceleration. **The lighter bowling ball** accelerates faster.

## What are planetary orbits?

An orbit is **a regular repeating path that one object in space takes around another one**. … Many planets have moons that orbit them. A satellite can also be man-made like the International Space Station. Planets comets asteroids and other objects in the solar system orbit the sun.