The water flowing over Niagara Falls drops a distance of 50 m. If all the gravitational potential energy is converted to thermal energy, by what temperature does the water rise? The specific heat of water is 4186 J/kg ? K
A) 0.10 C°
B) 0.12 C°
C) 0.37 C°
D) 0.42 C°
B
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Take a cup of water, add sugar, and stir. Continue adding sugar and stirring until the sugar crystals no longer dissolve. Then apply heat to dissolve the remaining crystals. If the resulting solution is allowed to slowly cool, the solution is said to be
a. an unsaturated solution. b. a saturated solution. c. a supersaturated solution. d. none of these.
The Orion region contains young main sequence stars and an emission nebula, but the original molecular cloud they formed out of has been dispersed
Indicate whether the statement is true or false
______ navigation uses a website visitor's browsing or search history to provide content suggestions.
A. Primary B. Subsidiary C. Contextual D. Adaptive
A current-carrying 2.0-cm long segment of wire is inside a long solenoid (radius = 4.0 cm, n = 800 turns/m, current = 50 mA). The wire segment is oriented perpendicularly to the axis of the solenoid. If the current in the wire segment is 12 A, what is the magnitude of the magnetic force on this segment?
a. 22 ?N b. 16 ?N c. 18 ?N d. 12 ?N e. 0 ?N