Three identical springs are arranged as shown below
7
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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
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
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