The photoreceptors responsible for color vision are called ______________
Fill in the blank(s) with correct word
cones
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A violet-hot star emits radiation having about twice the peak frequency of radiation from a red-hot star. The surface temperature of the hotter star is about
A) half that of the cooler star. B) twice that of the cooler star. C) the same.
Jane says that the magnitude of the torque exerted by a force of magnitude F is equal to the perpendicular distance from the axis of rotation r multiplied by F, while Jason insists that it is equal to the distance from the axis of rotation r
multiplied by the magnitude of the perpendicular component of the force, F Who is right?
Superconductors are materials that are good conductors of electricity
A. at any temperature B. only at temperatures below the critical temperature C. only at temperatures above the critical temperature
What is meant by a hypothesis?
A) a natural phenomenon that requires explanation B) an explanation for a phenomenon that makes a prediction C) a tentative understanding of a natural phenomenon D) a pseudoscientific idea E) a historical theory that has been proved inaccurate