Which internal energy source produces heat by converting gravitational potential energy into thermal energy?

Accretion and Differentitaiton/ both A and B More test answers on https://studyhippo.com/astronomy-ch-9-31920/

The diagram above shows a planet at four positions in its orbit. At which position does it have the greatest gravitational potential energy?

Farthest from the sun More test answers on https://studyhippo.com/mastering-astronomy-chapter-4-2-33505/

The diagram above shows a planet at four positions in its orbit. At which position does it have the greatest total orbital energy? (Orbital energy is the sum of the planet’s kinetic and gravitational potential energy.)

The total orbital energy is the same at all four positions. More test answers on https://studyhippo.com/mastering-astronomy-chapter-4-2-33505/

Which of the following correctly describes how the process of gravitational contraction can make a star hot? A.Heat is generated when gravity contracts, because gravity is an inverse square law force. B.Gravitational contraction involves nuclear fusion, which generates a lot of heat. C.Gravitational contraction involves the generation of heat by chemical reactions, much like the burning of coal. D.When a star contracts in size, gravitational potential energy is converted to thermal energy.

D.When a star contracts in size, gravitational potential energy is converted to thermal energy. More test answers on https://studyhippo.com/astronomy-chapter-11/

3) Why did the solar nebula heat up as it collapsed? A) Nuclear fusion occurring in the core of the protosun produced energy that heated the nebula. B) As the cloud shrank, its gravitational potential energy was converted to kinetic energy and then into thermal energy. C) Radiation from other nearby stars that had formed earlier heated the nebula. D) The shock wave from a nearby supernova heated the gas. E) Collisions among planetesimals generated friction and heat.

Answer: B More test answers on https://studyhippo.com/astr-chapter-8-2-39661/

Why did the solar nebula heat up as it collapsed? A) Nuclear fusion occurring in the core of the protosun produced energy that heated the nebula. B) As the cloud shrank, its gravitational potential energy was converted to kinetic energy and then into thermal energy. C) Radiation from other nearby stars that had formed earlier heated the nebula. D) The shock wave from a nearby supernova heated the gas. E) Collisions among planetesimals generated friction and heat.

B More test answers on https://studyhippo.com/astr-102-test-mc08-satf-39281/

Home Page Gravitational Potential Energy

Gravitational Potential Energy Flashcards, test questions and answers

Discover flashcards, test exam answers, and assignments to help you learn more about Gravitational Potential Energy and other subjects. Don’t miss the chance to use them for more effective college education. Use our database of questions and answers on Gravitational Potential Energy and get quick solutions for your test.

What is Gravitational Potential Energy?

Gravitational Potential Energy is the energy possessed by an object due to its position in a gravitational field. It is directly proportional to the mass of the object and the height from which it has been raised above a reference point; this reference point can be any convenient point such as ground level or sea level. The higher an object is, the more gravitational potential energy it has. Gravitational potential energy can be used for many purposes, such as transportation and generating electricity. For example, when an airplane takes off, kinetic energy converts into gravitational potential energy during its ascent until it reaches cruising altitude. This stored energy is then released during descent allowing efficient movement over long distances. Similarly, hydroelectric dams store water at higher elevations creating gravitational potential energy that can later be converted into electricity through turbines when needed. In addition to being used for practical applications, understanding Gravitational Potential Energy also helps us better understand natural phenomena such as tides and planetary motion around stars like our sun. The Sun’s gravity produces a tidal effect on Earth’s oceans causing them to bulge towards and away from the Sun. Additionally, planets orbiting around stars create periodic changes in their gravitational potential energies which affects their orbital paths and movements around them over time as they gain or lose speed depending on how close or far away they are from their star at any given moment in time due to its gravity field strength changing with distance. Overall, Gravitational Potential Energy plays a major role in everyday life both practically and theoretically making it one of the most important forms of energy available today.