A boy on board a cruise ship drops a 30.0 g marble into the ocean. If the resistive force proportionality constant is 0.500 kg/s, what is the terminal speed of the marble in m/s?
a. 0.147
b. 0.294
c. 0.588
d. 1.18
e. 2.35
c
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The age of a star cluster can be approximated by finding its turnoff point in the distribution of data points that represent stars on the H-R Diagram
a. True b. False Indicate whether the statement is true or false
Which properties affect the location of the habitable zone?
A. Star size B. Exoplanet semi-major axis C. Number of exoplanets in the system D. All of these choices are correct. E. None of these choices are correct.
The electron microscope's main advantage over the optical microscope is which of the following?
a. greater ease of portability b. dispenses with need for a lens c. higher power lens used d. higher resolution possible
What is the braneworld theory?
A) the theory of the inflationary epoch of the universe that happened in its early stages B) the idea that extra dimensions exist around us but we are confined to a membrane with just three spatial dimensions C) the idea that scientists can accomplish anything if they use their brains D) the theory that worlds like Earth were created right at the moment of the Big Bang, and that strings connect them even at present E) the idea that many different worlds exist in an infinite universe