A(n) ____ is a commonly accepted set of scientific ideas and assumptions
a. theory
b. paradigm
c. hypothesis
d. natural law
e. model
b
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What is the potential difference VB?VA when I = 0.50 A in the circuit segment shown below?
A. +28 V B. +2.0 V C. ?28 V D. ?2.0 V E. +18 V
A hydraulic device has two pistons, one with a small cross-section area and another piston with a larger cross-section area. If a given force is applied to the small piston, the output force on the larger-area piston will be
A) less. B) the same. C) greater. D) all of the above E) none of the above
Which portion of the electromagnetic spectrum is used in aircraft navigation?
a. infrared waves b. microwaves c. radio waves d. ultraviolet light
An explorer walks into a lab in a science building. She has a compass in her hand and finds that the south pole of her compass points toward the room's east wall when she is nearer that wall and toward the west wall when she is nearer that wall. You could explain this if magnetized metal had been installed in the east and west walls with north poles pointing into the room. If no magnetic material
was installed in the north or south walls of the room, she would expect that a. the south pole of the compass would tend to point toward those walls. b. the north pole of the compass would tend to point toward those walls. c. the compass needle would not point in any particular direction. d. the north pole of the compass needle would tend to point toward the centers of those walls, but the south pole would tend to point toward the sides of those walls. e. the south pole of the compass needle would tend to point toward the centers of those walls, but the north pole would tend to point toward the sides of those walls.