Who is John Snow?
What will be an ideal response?
Father of epidemiology. discovered cholera came from drinking water
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Complete the following statement: The sum of the magnitudes of the currents directed into a junction
a) equals the sum of the magnitudes of the currents directed out of the junction. b) is less than the total current directed out of the junction. c) equals the current that is directed along one of the lines out of the junction. d) is divided equally among the number of lines directed out of the junction. e) is greater than the total current directed out of the junction.
An constant electric field, 
N/C, goes through a surface with area 
m2. (This surface can also be expressed as an area of 10 m2 with the direction of the unit vector
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Two bulbs are shown in a circuit that surrounds a region of increasing magnetic field directed out of the page. When the switch is closed,
A. bulb 1 glows more brightly. B. bulb 2 glows more brightly. C. both bulbs glow equally brightly. D. bulb 1 goes out. E. bulb 2 goes out.
A point charge Q is placed on the x axis at x = -2.0 m. A second point charge, -Q, is placed at x = 1.0 m. If Q = 60 mC, what is the magnitude of the electrostatic force on a 40-mC charge placed at the origin?
a. 16 N b. 27 N c. 32 N d. 11 N e. 3.0 N