If the acceleration of an object is always directed perpendicular to its velocity, then
A) the object is speeding up.
B) the object is slowing down.
C) the object is turning.
D) the object is t rest.
E) this situation would not be physically possible.
C
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The gravitational force between two metal spheres in outer space is 1800 N. How large would the force be if the two spheres were twice as far apart?
A. 7200 N B. 3600 N C. 900 N D. 450 N
Which of these are good insulators?
A) feathers B) wood C) snow D) all the above E) none of the above
The maximum permissible workday dose for occupational exposure to radiation is 18 mrem. A 54-kg laboratory technician absorbs 2.6 mJ of 0.30-MeV gamma rays in a work day
The relative biological effectiveness (RBE) for gamma rays is 1.00. What is the ratio of the equivalent dosage received by the technician to the maximum permissible equivalent dosage? A) 0.27 B) 0.29 C) 0.32 D) 0.35 E) 0.37
The two jovian planets that contain the highest proportions of hydrogen compounds are
A. Saturn and Neptune B. Jupiter and Neptune C. Jupiter and Saturn D. Saturn and Uranus E. Uranus and Neptune F. Jupiter and Uranus