The air in a tube open at both ends is sent into its fundamental resonance. One end of the tube is then closed and the air column is again set into its fundamental resonance. The resonant frequency ____ after the end is closed
a. halves
b. stays the same
c. doubles
d. increases by a factor of 1.4
a
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In the hydrogen molecule, H2, the separation between the protons is 10?10 m. If the molecule is in its first rotational energy state, what is the angular velocity of the molecule about its center of mass?
The dominant force at convergent boundaries is
A) compression. B) tension. C) shearing. D) similar to that in normal faulting.
Estimate the transverse tensile strength of the concrete in Problem 12.6.
What will be an ideal response?
Radioactive Decay: A test tube of an isotope having a decay constant of 0.765 × 10-6 s-1 contains 3.0 × 1017 nuclei of this isotope.(a) What is the half-life of this isotope?(b) What is the initial activity (in Bq) of the isotope?(c) What is the activity of the isotope after 12 days?
What will be an ideal response?