At a distance of 14,000 km from the center of Planet Z-99, the acceleration due to gravity is 32 m/s2. What is the acceleration due to gravity at a point 28,000 km from the center of this planet?
A) 8.0 m/s2
B) 16 m/s2
C) 128 m/s2
D) 4.0 m/s2
E) 2.0 m/s2
A
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If a force on an object is aimed opposite the direction of the object's velocity, the force does
a. no work. b. positive work. c. negative work. d. any of the above.
Conversion of Units: The column of Trajan, erected in Rome in 106-113 A.D., is 125 feet tall. What is its height in centimeters? (2.54 cm = 1.00 in.)
A. 1510 cm B. 591 cm C. 2520 cm D. 3810 cm E. 38,100 cm
Which of the following statements is true of the angles of incidence and reflection?
a. They are not related b. They can never be equal c. They are always equal d. They add to 90°.
What length of copper wire (resistivity 1.68 × 10-8 ??m) of diameter 0.15 mm is needed for a total resistance of 15 ??
A) 16 mm B) 16 cm C) 1.6 m D) 16 m E) 160 m