The following objects are sitting on a table, one meter above the floor. Which object will have the most potential energy?
a. a pea
b. a tomato
c. a grape
d. a watermelon
Answer: d. a watermelon
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Compared to Jupiter and Saturn, Uranus and Neptune
A) are substantially larger B) contain a much higher proportion of hydrogen compounds C) have no ring systems D) are much more massive
What characteristic of sound determines the "pitch" of a musical note?
A) amplitude B) wavelength C) frequency D) phase E) intensity
Two uses of ultrasound are navigation by bats and controlling insects
Indicate whether the statement is true or false
Radiation Doses: A 70-kg researcher absorbs 4.5 × 108 neutrons in a work day, each of energy 1.2 MeV. The relative biological effectiveness (RBE) for these neutrons is 10. What is the equivalent dosage of the radiation exposure for this researcher, in millirem?
A. 1.2 mrem B. 0.39 mrem C. 0.77 mrem D. 3.7 mrem E. 12 mrem