If the energy of a particle in a box in the ground state is E, what is the energy in the state n = 4?
What will be an ideal response?
16E
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The rapid fluctuations of quasars show that the energy emitting portions of these objects must be very small
Indicate whether the statement is true or false
The present standard for time is based on
a. the transition of an electron between two energy levels of the cesium-133 atom. b. Earth's rotation. c. Earth's orbit. d. none of these.
By studying distant galaxies in the 1920s, Hubble made which of the following important discoveries that led us to conclude that the universe is expanding?
A) All galaxies contain billions of stars, and all galaxies have spiral shapes. B) All galaxies were born at the same time, and all will die at the same time. C) All galaxies outside the Local Group are moving away from us, and the farther away they are, the faster they're going. D) All galaxies outside the Local Group are orbiting the Local Group. E) All galaxies outside the Local Group are moving away from us, and all are moving away at nearly the same speed.
In a simple-cubic lattice, the interstitial atoms are positioned at the coordinates _____________.
Fill in the blank(s) with the appropriate word(s).