If you were between 40° and 50° North, and you wanted to stand with the average surface winds blowing in your face you would stand facing
A) east. B) northeast. C) north. D) south. E) west.
E
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What percentage of Americans over the age of 6 have trace levels of BPA in their bodies?
a. 93% b. 95% c. 90% d. 83% e. This applies to citizens of other developed countries, but not America.
A skillet is lined with a thin layer of cooking oil followed by a layer of unpopped popcorn kernels. Upon heating the kernels, all pop thereby escaping the skillet. Which of the following physical and/or chemical changes occurred?
A. The water within each kernel is heated to the point that it would turn into water vapor as the kernels popped (physical change). B. The starches within the kernels are cooked by the high temperatures (chemical change). C. Both A and B occur. D. Physical and chemical changes cannot occur without a real chemical reaction taking place.
The average frequency of radiant energy is directly proportional to the
A. Celsius temperature of the emitter. B. kelvin temperature of the emitter. C. Fahrenheit temperature of the emitter. D. all of the above
What is carbon-14 dating useful for in terms of age and type of sample? What will be an ideal response?