A heat engine is any device that changes mechanical work into thermal energy
Indicate whether the statement is true or false
FALSE
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Which photo shows what we call a first-quarter moon? (Note: Assume these photos were taken in the Northern Hemisphere.)
A) 1 B) 2 C) 3 D) 4
Which statement is correct?
A. No systems of multiple exoplanets have been detected. B. No gas giants have been detected orbiting closer than 1 au to their stars. C. No exoplanets have been detected orbiting closer than 1 au to their stars. D. No exoplanets have been detected orbiting binary stars. E. None of these choices are correct.
The adoption of very similar streamlined body shapes by both sharks and dolphins provides evidence for
A) cross-breeding B) convergent evolution C) genetic mutations D) life originating in the oceans
Our Sun should become a planetary nebula in another five billion years
Indicate whether the statement is true or false