Midterm 2011 Solutions

673x10 11 3000x108 1602x10 19 6626x10 34 1381x10 23

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Unformatted text preview: ntral pressure, ≈2x1011 N/m2. Explain the difference. Page 11 of 19 Physics 160 Fall 2011 EXTRA WORKSPACE Page 12 of 19 Midterm Exam Physics 160 Fall 2011 EXTRA WORKSPACE Page 13 of 19 Midterm Exam Physics 160 Fall 2011 EXTRA WORKSPACE Page 14 of 19 Midterm Exam Physics 160 Fall 2011 EXTRA WORKSPACE Page 15 of 19 Midterm Exam Physics 160 Fall 2011 EXTRA WORKSPACE Page 16 of 19 Midterm Exam Physics 160 Fall 2011 Midterm Exam Physical constants Quantity Value Units Stefan-Boltzmann constant (σ) Radiation constant (a) Electron mass (me) Proton mass (mp) Neutron mass (mn) Hydrogen mass (mH) Atomic mass unit (u) Avogadro's number (NA) Gas constant (R) Bohr radius (a0) 6.673x10-11 3.000x108 1.602x10-19 6.626x10-34 1.381x10-23 8.617x10-5 5.670x10-8 7.566x1016 9.109x10-31 1.67262x10-27 1.67493x10-27 1.67353x10-27 1.66054x10-27 6.022x1023 8.314 5.292x10-11 N m2 kg- 2 m s- 1 C Js J K- 1 ev K- 1 W m- 2 K- 4 J m- 3 K- 4 kg kg kg kg kg mol-1 J mol-1 K-1 m Solar Solar Solar Solar Solar Solar Earth Earth 1.989x1030 3.839x1026 6.955x108 5800 4.74 G2 V 5.974x1024 6.378x106 kg W m K λ0 for Lyα line (HI n=1 → n=2) λ0 for Hα line (HI n=2 → n=3) 121.6 656.3 nm nm Astronomical unit (AU) Light year (ly) Parsec (pc) Electron volt (eV) Radian π e 1.496x1011 9.46x1015 3.086x1016 1.602x10-19 57.296 3.14159 2.71828 m m m J º Gravitational constant (G) Speed of light (c) Electric charge (e) Planck's constant (h) Boltzmann's constant (k) mass (M) luminosity (L) radius (R) effective temperature abs. bolometric magnitude Spectral Type mass (ME) radius (RE) Page 17 of 19 kg m Physics 160 Fall 2011 Midterm Exam Equations Definition of magnitude: m is the apparent magnitude, f is the flux Distance modulus: m1 – m2 =  ­2.5 log10 (f1/f2) M is the absolute magnitude and d is distance; note that MVega = 0 in all bands M – m =  ­5 log10 (d/10 pc) Bolometric magnitude: Mbol = 4.74  ­ 2.5 log10 (L/L) Bolometric correction: BCV = mbol – V = Mbol  ­ MV Angular separation: θ (radians) = separation/distance θ (“) = separ...
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This document was uploaded on 02/26/2014 for the course PHYS 160 at UCSD.

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