Stars motion within the disk of the Milky Way galaxy are ordered in that they the all go in the same direction, counter-clockwise, as viewed from above (e.g., as viewed from above the north rotational axis of the Sun),
a. True
b. False
Indicate whether the statement is true or false
True
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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
When the chromosphere can be seen during a solar eclipse, it appears:
A) invisible. B) violet. C) blue. D) yellow. E) red.
If a 1 050-kg car was moving at 25 m/s, what would be its kinetic energy expressed in the unusual (for kinetic energy) units of calories? (1 cal = 4.186 J)
a. 3.1E+5 b. 3.3E+5 c. 6.6E+5 d. 7.8E+4 e. 6.3E+3
The SI units of velocity are
a. mi/h b. km/h c. m/s2 d. m/s e. none of the above