What did Hans Bethe theory propose is the primary source of the Suns energy?

In 1938 German-born physicist Hans Bethe proposed the first satisfactory theory of stellar energy generation based on the fusion of protons to form helium and heavier elements. He showed that once elements as heavy as carbon had been formed, a cycle of nuclear reactions could produce even heavier elements.

What type of theory was Rene Descartes idea that the solar system formed out of a gigantic whirlpool or vortex?

Based on the ideas of Descartes, Immanuel Kant and Pierre Simon Laplace proposed the nebular theory which suggested that a great cloud of gas and dust, called nebula, begins to collapse because of gravitational pull. As the cloud contracted, it spun more rapidly.

What type of theory did the triple star system represent?

This triple star system provides a great test bed for the theory of relativity. If Einstein’s ideas apply to massive objects, the white dwarf/neutron star binary should fall towards the other white dwarf at the same rate.

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Often people will explain thermal energy transfer, or heating, by convection by saying that “heat rises.” To correctly explain this phenomenon, we should say that “heated fluid rises.” Transfer by convection Liquids and gases are not very good conductors of heat.

What particles in addition to electrons make up most solar winds?

The solar wind is a stream of charged particles released from the upper atmosphere of the Sun, called the corona. This plasma mostly consists of electrons, protons and alpha particles with kinetic energy between 0.5 and 10 keV.

Who gave the mechanistic view of the universe?

All three terms refer to the scientific paradigm formulated by René Descartes in the seventeenth century (see Section 1.1. 3), in which the material universe is seen as a machine and nothing but a machine.

What are the four theories of the Solar System?

Five major theories about the formation of the Solar System.

  • The origin of the Solar System. …
  • What are the theories for the origin of the Solar System? …
  • The Accretion theory. …
  • The Protoplanet theory. …
  • The Capture theory. …
  • The Modern Laplacian theory. …
  • The Modern Nebular theory. …
  • Conclusion.

What are the other theories for the origin of the earth?

Alternative theories

  • Tidal theory. …
  • Chamberlin–Moulton model. …
  • Lyttleton’s scenario. …
  • Band-structure model. …
  • Interstellar cloud theory. …
  • Hoyle’s hypothesis. …
  • Kuiper’s theory. …
  • Whipple’s theory.

How did our Solar System form what is the most likely hypothesis?

According to this theory, the Sun and all the planets of our Solar System began as a giant cloud of molecular gas and dust. This could have been the result of a passing star, or shock waves from a supernova, but the end result was a gravitational collapse at the center of the cloud. …

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What are three ways heat can be transferred?

Heat can be transferred in three ways: by conduction, by convection, and by radiation.

  • Conduction is the transfer of energy from one molecule to another by direct contact. …
  • Convection is the movement of heat by a fluid such as water or air. …
  • Radiation is the transfer of heat by electromagnetic waves.

Does warm air rises because of convection?

Natural convection is caused by density differences. Hot air rises because it is less dense than cold air, so air will rise above a heater and sink near a cold window. Forced convection refers to fluids being pushed around by outside forces. … Hot air rises, because it’s less dense than cold air.

What direction is heat transferred in the situation?

And unless people interfere, thermal energy — or heat — naturally flows in one direction only: from hot toward cold. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation. Sometimes more than one may occur at the same time.

Energy sources