Today, which organisms have the highest biomass?

A) fungi
B) plants
C) animals
D) microbes


D

Physics & Space Science

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If the radius of star A is twice the radius of star B, but both have similar temperatures, how do their luminosities compare?

A: Star A is 2 times as luminous as star B. B: Star A is 4 times as luminous as star B. C: All stars have the same luminosities. D: Star A is 4 times less luminous than star B. E: Star A is 2 times less luminous than star B.

Physics & Space Science

The possibility of extraterrestrial life was first considered

A) after the invention of the telescope B) only during the past few decades C) thousands of years ago during ancient times D) at the turn of the 20th century

Physics & Space Science

A simple pendulum, consisting of a mass m and a string of length L, swings upward, making an angle ? with the vertical. The work done by the tension force is

A) zero. B) mgL. C) mgL cos ?. D) mgL sin ?. E) mgL tan ?.

Physics & Space Science

The use of thermal mass on a direct gain passive solar system _______

a. reduces temperature fluctuations during the day. b. provides foundation support for the collector superstructure c. increases the insolation on the south-facing windows d. increases temperature fluctuations during the night

Physics & Space Science