The combining of two nuclei to form a larger nucleus with the release of energy is nuclear fusion
a. True
b. False
Indicate whether the statement is true or false
True
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Parallel-Plate Capacitor: Two parallel square metal plates, 8.4 cm on each side, are 2.5 mm apart and carry equal but opposite charge uniformly distributed over their facing surfaces. How much excess charge is there on each plate if the electric field between the plates has a magnitude of 2.0 × 106 N/C? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
Absorption lines are produced by ____
a. atoms that become ionized b. electrons that transfer from a high energy level to a low energy level c. electrons that transfer from a low energy level to a high energy level d. the intensity of agitation of atoms in a hot gas e. the motion of an object toward or away from the observer
A longitudinal wave travels on a slinky or any long spring. The wave is represented by the equation x(x, t) = 2.1 cm cos(2000 rad/s t - 40
x). What is the direction of the velocity of the wave?
A. the - x direction B. the + x direction C. the - y direction D. the + y direction
What causes the outward pressure that balances the inward pull of gravity in a star?
a. the outward flow of energy b. the opacity of the gas c. the temperature of the gas d. the density of the gas e. the temperature and the density of the gas