Because we have not found another planetary system like our own, we can conclude that our Solar System must be quite unusual
Indicate whether the statement is true or false
FALSE
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Briefly outline the theory or hypothesis which best explains the origin of the solar system
What will be an ideal response?
What change slowly occurs during the main-sequence lifetime of a star?
A) As the solar wind blows material into space, the decreasing mass reduces pressure in the core, which in turn reduces the fusion rate and the luminosity. B) As hydrogen is used up in the core, the fusion rate decreases and reduces the luminosity. C) It gathers more gas from interstellar space, increasing its mass and hence the luminosity. D) Its core temperature slowly increases, increasing the fusion rate and hence the luminosity.
Human beings mostly emit which kind of electromagnetic radiation?
A) ultraviolet B) visible C) microwave D) infrared
For which of the values below is x > x3?
a. x = -1.5 c. x = 1.0 b. x = 0 d. x = 1.5