Lightning is dangerous to humans because lightning strokes
a. carry large currents c. have no resistance
b. have high voltages d. fry whatever they hit
A
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An initially uncharged hollow metallic sphere with radius of 6 cm has a small object with a charge of +14 µC carefully placed at the center of the sphere through a hole in the latter's surface. With the charge in place, what charge is now present on the outside surface of the sphere?
a. zero b. ?14 µC c. +5 600 µC d. +14 µC e. ?5 600 µC
Sound energy that is not reflected is
A) transmitted. B) absorbed. C) either or both of these
From its definition and property values, calculate the coefficient of thermal expansion, ?, for saturated water at 403 K. Then compare your results with the value in the table.
GIVEN • Saturated water at 400 K FIND • The thermal expansion coefficient, ?, from its definition
The arrangement is composed of four 6.0 mF capacitors. What is the capacitance of the combination?
A. 24.0 mF
B. 4.5 mF
C. 8.0 mF
D. 9.0 mF
E. 12.5 mF