In Bohr's model of the atom, electrons
A) only make transitions between orbitals of specific energies.
B) are not confined to specific orbits.
C) are spread uniformly through a large, positive mass.
D) can be halfway between orbits.
E) move from orbit to orbit in many small steps.
A
You might also like to view...
Isobaric work is
A) V ?p. B) p ?T. C) p ?V. D) Q - W. E) Q + W.
Spiral galaxies are mostly found ____
a. in poor clusters where their disk structure will not be disrupted b. isolated in space with only small dwarf galaxies nearby c. in the center of rich clusters where tidal forces can support their arm structure d. in clusters with hot intergalactic gas helping support star formation e. orbiting giant elliptical galaxies in a galactic binary system
If a galaxy is located at a distance of 18 Mpc and is found to have recessional velocity of 1170 km/sec, what is Hubble's constant based only on this galaxy?
a. 65 km/sec b. 75 km/sec c. 55 km/sec d. 85 km/sec e. 95 km/sec
Cygnus X-1 was discovered because it is a(n) ________ source in a(n) ________ system
Fill in the blank(s) with correct word