Question

29.The discrete spectrum of hydrogen, the discrete spectrum of helium, and the discrete spectra of other elements show atomic quantization in this way:

A. it shows all of the colors of the rainbow, the entire ROY G. BIV spectrum.

B. a countable set of colors, as opposed to a continuous ROY G. BIV spectrum from a thermal source.

C. absence of infrared or ultraviolet spectral lines.

D. there is more quantum energy in the red end than in the blue end.

30. The quantity Δ x denotes the difference in the x-coordinate between two locations, and it is measureable in meters.

True

False

31.Total mechanical energy is never conserved.

True

False

34.In uniform circular motion, the velocity vector v → is perpendicular to the Δ v → vector.

True

False

Answer 1

Q 29 option B is correct.

Q 30 True , in MKS unit it is measured in meter

Q 31 false, total energy is always conserved.

Q 32 True. ∆v is acceleration vector which is always perpendicular to v.