________ are great wrinkle marks on Mercury's crust, due to its core contracting
A) Rilles
B) Chaotic terrain
C) Hollows
D) Scarps
E) Craters
D
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Equilibrium: A piano mover raises a 1000-N piano at a constant speed using a very light rope in a frictionless pulley system, as shown in the figure. With what force is the mover pulling down on the rope?
A. 2000 N B. 1000 N C. 500 N D. 250 N E. Depends on the speed of the piano.
A very long straight wire carries a 12-A current eastward and a second very long straight wire carries a 14-A current westward. The wires are parallel to each other and are 42 cm apart. Calculate the force on a 6.4 m length of one of the wires
(?0 = 4? × 10-7 T ? m/A) A) 5.1 × 10-4 N B) 2.2 × 10-4 N C) 5.1 × 10-6 N D) 8.0 × 10-5 N E) 8.0 × 10-7 N
A certain disk can store 600 megabytes of information. If an average word requires 9.0 bytes of storage, how many words can be stored on one disk?
A) 6.7 × 107 words B) 5.4 × 109 words C) 2.1 × 107 words D) 2.0 × 109 words
A plasma will conduct electricity
a. True b. False Indicate whether the statement is true or false