The general theory of relativity deals with the effects of gravity, but the special theory of relativity does not take gravity into account
Indicate whether the statement is true or false
TRUE
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Astronomers can measure a star's mass in only certain cases. Which one of the following cases might allow astronomers to measure a star's mass?
A) We know the star's luminosity and distance. B) The star is of spectral type G. C) The star is a member of a binary star system. D) The star is of spectral type A.
What is the wavelength of a photon having energy 2.00 eV? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
What will be an ideal response?
Develop the control volume difference equation for one-dimensional steady conduction in a in with variable cross-sectional area A(x) and perimeter P(x). The heat transfer coefficient from the fin to ambient is a constant oh and the fin tip is adiabatic.
GIVEN
• Fin with variable cross-sectional area and perimeter
• Convection coefficient to ambient is constant, ho
FIND (a) Control volume difference equation
SKETCH
What parameters do Hubble's Law relate to each other?
A.) Galaxy rotation speed and luminosity. B.) Galaxy classification and mass. C.) Cepheid star period and luminosity. D.) Galaxy recession velocity and distance. E.) Galaxy mass and distance.