A circular loop of wire lies in the plane of the paper. An increasing magnetic field points out of the paper. What is the direction of the induced current in the loop?
A) counter-clockwise then clockwise
B) clockwise then counter-clockwise
C) clockwise
D) counter-clockwise
E) There is no current induced in the loop.
C
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The bluer the light, the ____ each photon contains
a. more energy b. less energy c. less speed d. more speed e. none of the above
Elastic Collisions: A 320-g air track cart traveling at 1.25 m/s suddenly collides elastically with a stationary 270-g cart. What is the speed of the 270-g cart just after the collision?
A. 0.678 m/s B. 0.106 m/s C. 1.36 m/s D. 1.14 m/s E. 2.72 m/s
In producing a uranium bomb, the most difficult step is
A) getting the uranium into gaseous form B) finding and mining the uranium. C) separating the fissionable isotope from the non-fissionable isotope. D) constructing the triggering mechanism. E) keeping it from blowing up during construction.
Living next to a lake near volcanic activity can be deadly. There can be large amounts of CO2 dissolved in the water. An earthquake, landslide, or even rapid cooling can trigger the release of the CO2, causing death nearby. The water of the lake in these cases is
a. an unsaturated solution. b. a saturated solution. c. a supersaturated solution. d. a completely unsaturated solution.