The resistivity of the material of a wire is 1.76 × 10-8 ?m. If the diameter of the wire is 2 × 10-3 m and its length is 2 m, what is its resistance?
A) 112 ?
B) 11.2 ?
C) 1.12 ?
D) 0.112 ?
E) 0.0112 ?
E
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The reaction forces at B (components By and Bz) for the space truss shown below are:
(A) By 5 211.6, Bz 5 23.5 kips
(B) By 5 11.6, Bz 5 223.5 kips
(C) By 5 223.5, Bz 5 11.6 kips
(D) By 5 23.5, Bz 5 211.6 kips
Imagine that the magnet is moving downward instead of upward. 
In this situation, specify the directions of each of the vector quantities described below. Use the answer chart provided above and to the right (note that answers B and E refer to the +y and -y directions, respectively). What is the direction of 
at the origin (point O)?
A. A B. B C. C D. D E. E F. F T. Zero
Rocks solidified from molten material above ground are classified as ______________ igneous rocks
Fill in the blank(s) with correct word
In order to train for a high-g environment, an astronaut is placed in a centrifuge of radius several meters and rotated in a horizontal circle at constant speed. In this situation, in which direction is the net force on the astronaut?
a. The net force is down since gravity cannot be turned off. b. The net force is horizontal toward the center of the circle. c. The net force is between horizontal toward the center of the circle and straight up, the angle depending on the speed and the radius involved. d. The net force is zero since the astronaut is moving at constant speed and thus the force has no direction.