A boat has a velocity 12. km/hr Southward and 16. km/hr Westward. What is its speed and how long does it take to travel 94. km?
What will be an ideal response?
20. km/hr for 4.7 hours
Physics & Space Science
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Which of the following is not a sustainable source of materials?
(a) Ore (b) Plants (c) Municipal waste (d) Microorganisms
Physics & Space Science
Energy used for production of ethanol from corn is _____than the energy output
a. more b. less c. the same
Physics & Space Science
The chemical abundance of population I stars
a. indicates that they were formed before the population II stars. b. indicates that the material they formed from had been enriched with material from supernovae. c. indicates that they contain very few heavy metals compared to halo stars. d. depends on the temperature of the star. e. depends on the mass of the star.
Physics & Space Science
In organic molecules, a chlorine atom will normally form how many bonds?
a. 2 b. 3 c. 4 d. 1 e. 0
Physics & Space Science