Compared to a recoiling rifle, the bullet that is fired has a greater
A) momentum.
B) kinetic energy.
C) none of the above
Answer: B
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We can model a general cyanine-type dye molecule as if it contained N electrons trapped in a “box”-like potential energy function, where N is some even integer. The energy of a single quanton in a box is given by En = E1n2, where n is an integer and E1 is the energy of the ground (n = 1) energy level. If for a given molecule there are four electrons trapped in the molecule’s “box,” what is the lowest possible total energy of those electrons?
A. Etot = E1 B. Etot = 4E1 C. Etot = 8E1 D. Etot = 10E1 E. Etot = 30E1
The order in which solar energy is converted to the kinetic energy of an automobile is
A) photocells, electrolysis, motor, fuel cells, kinetic energy. B) photocells, electrolysis, fuels cells, motor, kinetic energy. C) electrolysis, fuel cells, photocells, motor, kinetic energy.
A 100-W light bulb is powered by 120 V ac 60.0-Hz household connection. Determine the rms current and the current amplitude
What will be an ideal response?
What evidence supports the theory that elliptical galaxies come from denser clouds?
A) Elliptical galaxies are denser than spiral galaxies. B) Elliptical galaxies are generally larger than spiral galaxies. C) Elliptical galaxies at high redshifts lack young, blue stars. D) Elliptical galaxies have more gas than spiral galaxies. E) Elliptical galaxies have denser stars than spiral galaxies.