Three identical springs are arranged as shown below
7
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A photon is emitted from a hydrogen atom that undergoes a transition from n = 3 to n = 2 . Calculate the energy and wavelength of the photon. (The ionization energy of hydrogen is 13.6 eV, and h = 6.63 × 10^?34 J/s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^?19 J, and 1 nm = 10?9 m)
a. 1.9 eV, 660 nm b. 1.9 eV, 1050 nm c. 2.3 eV, 550 nm d. 2.3 eV, 660 nm e. 2.3 eV, 1050 nm
The main way astronomers determine the physical and chemical properties of an object in the distant universe is through
A) photography B) spectroscopy C) astrometry D) direct measurement
An ornament of mass 40.0 g is attached to a vertical ideal spring with a force constant (spring constant) of 20.0 N/m. The ornament is then lowered very slowly until the spring stops stretching. How much does the spring stretch?
A) 0.00200 m B) 0.0196 m C) 0.0816 m D) 0.800 m E) 0.200 m
Compounds that occur in gaseous form at room temperature are ______________ compounds
Fill in the blank(s) with correct word