For angular momentum to be conserved, the net force must be zero
Indicate whether the statement is true or false
FALSE
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A fixed container holds oxygen and helium gases at the same temperature. Which of the following statements are correct? (There could be more than one correct choice.)
A) The oxygen molecules have the greater speed. B) The helium molecules have the same average kinetic as the oxygen molecules. C) The helium molecules have the greater speed. D) The helium molecules have the greater average kinetic energy. E) The oxygen molecules have the greater average kinetic energy.
What does the phenomenon of diffraction demonstrate?
A) the wave nature of light B) the polarization of light waves C) the quantization of atomic orbitals D) the particle nature of the photon E) the process of ionization
What in a DC motor reverses the polarity and current each half-cycle?
A) a CRT B) solid ring commutator C) a split ring commutator D) fuse
The half-life of 18N is 0.62 s. What is the decay constant for this isotope?
a. 0.43 s–1 b. 1.1 s–1 c. 1.7 × 10^–11 Ci d. The decay constant is not defined for a half-life of less than one second.