The least common stars are _______________ stars

Fill in the blank(s) with correct word


upper-main-sequence
upper main sequence

Physics & Space Science

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Which of the following causes mutations in living organisms?

A) natural selection B) a changing environment C) reproduction D) ultraviolet light and toxic chemicals E) the greenhouse effect

Physics & Space Science

A spaceship of triangular shape, having a length three times its width, is capable of relativistic speeds. How fast would it have to move so that to a stationary observer its length would equal its width?

a. 0.333c b. 0.816c c. 0.943c d. 0.650c e. This is not possible.

Physics & Space Science

48 grams of oxygen at room temperature consists of how many moles?

a. 3.0 b. 1.5 c. 0.75 d. more than 3.0 e. less than 0.75

Physics & Space Science

Natural processes tend to increase the __________ of thermodynamic systems

Fill in the blank(s) with correct word

Physics & Space Science