The energy radiated by the sun has as its primary origin energy produced by ________ reactions.

What will be an ideal response?


fusion
nuclear fusion

Physics & Space Science

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Suppose that Hubble's constant were 20 kilometers per second per million light-years. How fast would we expect a galaxy 100 million light-years away to be moving? (Assume the motion is due only to Hubble's law.)

A) away from us at 20,000 km/s B) away from us at 200 km/s C) away from us at 2,000 km/s D) toward us at 2,000 km/s

Physics & Space Science

The average distance from Earth to the Sun is called the__________

A) astronomical unit B) light-year C) radius of curvature D) focal length

Physics & Space Science

Chunks of rock and metal that orbit the Sun but are much smaller than the planets are referred to as

A) comets B) dwarf planets C) meteors D) asteroids

Physics & Space Science

Light from a gas discharge tube gives a (an) ________ spectrum

A) continuous B) absorption C) blackbody D) emission

Physics & Space Science