A book is resting on a table. How many forces would be in the free-body diagram of the book?
A. one
B. two of the same type
C. two of different types
D. three or more of the same type
E. three or more of at least two different types
Answer: C
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Two long straight wires each carry a current of 12 A. One wire lies on the x-axis with its current in the positive x-direction. The other wire lies on the y-axis with its current in the positive y-direction. In the x-y plane, which quadrant (quadrants) has/have points where the magnetic field is zero?
A. I B. II C. II and IV D. I and III E. none
The uncompressed density of a planet in our solar system
a. is greatest for the Jovian planets. b. is greatest for the planets closest to the sun. c. is greatest for the planets furthest from the sun. d. is greatest for the planets with the largest mass. e. is greatest of the planet with the largest radius.
What is the inductive reactance of a 20-mH inductor at a frequency of 60 Hz?
A) 7.5 ? B) 0.13 ? C) 1.2 ? D) 1.2 m? E) 7.5 m?
In the habitable zone, surface water must be at least partially ________ in phase
Fill in the blank(s) with correct word