What is the K-T boundary?
A) a layer of dark sediment in the geological record formed at the same time humans learned to use fire
B) a boundary between rocks containing the oldest life and older rocks that contained no life
C) a boundary between the Earth's crust and the molten rock beneath it
D) a layer of dark sediment in the geological record separating the Cretaceous and Tertiary periods of Earth's history
D
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Dimensional Analysis: Newton's second law, F = ma, relates force F, mass m, and acceleration a. Use this equation to deduce the SI units of force.
A. kg ? m/s B. s2 / (kg ? m) C. m/s2 D. kg ? m/s2 E. m2/s2
In the spectrum of white light which one of the following colors corresponds to the lowest temperature?
A) Yellow B) Blue C) Red D) Green E) Orange
The largest diameter telescopes are used to observe
A) radio waves. B) infrared light. C) visible light. D) ultraviolet light. E) x-rays.
Engineers are designing a curved section of a highway. If the radius of curvature of the curve is at what angle should the curve be banked so that a car traveling at 29.0 m/s will stay on the road without the aid of frictional forces?
A) 23.9° B) 16.7° C) 21.0° D) 26.1°